Add Drop Multiplexing By Dispersion Inverted Interference Coupling

Size: px
Start display at page:

Download "Add Drop Multiplexing By Dispersion Inverted Interference Coupling"

Transcription

1 JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 20, NO. 8, AUGUST Add Drop Multiplexing By Dispersion Inverted Interference Coupling Mattias Åslund, Leon Poladian, John Canning, and C. Martijn de Sterke Abstract We demonstrate experimentally a previously proposed add drop multiplexer in a two-moded structure with a symmetric Bragg grating. The strong dispersion in the forward direction outside the reflective region of the grating is used to create a phase change for frequencies between the bandgaps of the supermodes of a twin core fiber. The phase change in transmission inverts the interference pattern at the end of the device. Signals within a narrow wavelength range couple out to one core; all other wavelengths couple out to the opposite core. Preliminary experimental results show a crosstalk ratio of 15 db. Index Terms Couplers, gratings, multimode waveguides, wavelength-division multiplexing. I. INTRODUCTION ADD DROP multiplexer devices allow access to single wavelength channels and are crucial devices in wavelength-division-multiplexed (WDM) networks [1]. Ideally, such devices have a low component count and require no fiber pig-tailing, thus allowing for low-cost manufacturing. Multiplexers based on Bragg grating technology enable the most spectrally efficient filter responses because of their spectrally steep edges. The most commonly deployed methods use the narrow bandwidth reflective properties of gratings to separate wavelength channels [1]. However, in practice, these devices require additional optical components, such as circulators, to separate input and reflected signals. There is, therefore, an interest in novel structures that can reduce manufacturing complexity and component count. This is most easily achieved in all-fiber devices. Some all-fiber designs already exist [2] [4]. All-fiber devices based on Bragg gratings and couplers can be divided in two categories: the Mach Zender interferometer with Bragg gratings outside the coupling regions [2] and devices with Bragg gratings imprinted inside the coupling region. The former device is interferometric with two separate fibers as the optical paths. The paths require careful and complex balance, which must be maintained throughout the lifetime. This instability is avoided by using an integrated planar waveguide Mach Zender [5] at the manufacturing expense mentioned earlier. The second category of devices, grating imprinted couplers, can be divided into two subcategories: the grating frustrated Manuscript received November 26, 2001; revised April 1, This work was supported by the Australian Research Council and by Ericsson Australia Pty Ltd. M. Åslund, L. Poladian, and J. Canning are with the Optical Fiber Technology Centre, University of Sydney, Sydney, Australia ( oftc.usyd.edu.au). C. M. de Sterke is with the School of Physics, University of Sydney, Sydney, Australia. Digital Object Identifier /JLT coupler [3] and the grating assisted coupler [4]. In this paper, we introduce a third subcategory, the dispersion inverted interference coupler. The device is based on the idea proposed in [6] in the context of a two-moded planar waveguide device. These devices are compared and discussed in Section II. In Section III, we show how we experimentally verified the proposed principle. In Section IV, we discuss the experimental results. We also demonstrate that the concept applies to any structure with two interfering modes. II. BRAGG GRATING IMPRINTED COUPLERS Devices with Bragg gratings imprinted in the coupling region can be divided into two types: symmetric or asymmetric. In the symmetric type, the grating is uniform across both cores, which are identical, and it does not matter for the functionality of the device into which core the signals are launched. In the asymmetric type, the grating is not uniform in both cores, and it is important for the functionality of the device into which core the signals are launched. Let us first consider the grating frustrated coupler [3], which is an asymmetric device. It consists of a matched directional coupler (two cored coupling region) with a Bragg grating written in the opposite core from where the input light signals are launched. At wavelengths unaffected by the grating dispersion, the light couples out fully to the opposite core from where the signal enter. In contrast, at wavelengths affected by the grating dispersion, the coupler becomes mismatched and the light remains in the input core. The grating dispersion effect is often enhanced by using dissimilar cores, which are only matched and couple over fully for a wavelength range relatively close to the Bragg wavelength [7]. If the signals are launched into the core with the grating, they are just reflected back into the core where they came from, as can be confirmed from the coupled mode equations given in [8]. The asymmetry of this device prevents it from being used as an add drop multiplexer; it has only a drop function and does not have an add function. It is not considered any further in this paper. Let us now consider symmetric grating imprinted couplers: the grating assisted coupler [4] and our new proposed device, the dispersion inverted interference coupler. They both consist of a coupling region with a grating written uniformly across both waveguides. Both devices are explained using the supermodes [9] of the twin-core structure since the formalism works well for symmetric devices. As the supermode method is not commonly used, we start our device descriptions with a brief review of the supermode method /02$ IEEE

2 1586 JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 20, NO. 8, AUGUST 2002 Fig. 1. Transverse symmetrical fields of the even and odd supermode (solid lines) of a twin-core structure (dashed circles). Fig. 3. Accumulated phase at the end of the grating structure for the two supermodes as a function of wavelength (solid line: fundamental supermode; dashed line: second-order supermode). Gray boxes mark the position of each supermode s rejection band. Fig. 2. Interference beating of symmetrical supermodes during propagation (matched directional coupling). A schematic of the transverse electric fields of an even and odd supermode of a symmetrical twin-core fiber is presented in Fig. 1. The dashed circles represent the two cores. The solid curves indicate the supermode profiles on the central axis connecting the cores. Light launched into one core excites both supermodes equally. During propagation, there is no power transfer between the supermodes. However, because the two supermodes have different propagation constants, they go in and out of phase during propagation and interfere with a period equal to their beat length, so that the optical power transfers between the cores; see Fig. 2 (matched directional coupling). A return to the original interference pattern occurs every time the accumulated difference in phase between the supermodes is a multiple of 2. The essential physical difference between the grating assisted coupler [4] and the dispersion inverted interference coupler is the length and strength of the grating; the essential functional difference is that one works in reflection and one in transmission. To understand why they work so differently, it is necessary to remember that each supermode reflects light at a Bragg wavelength ( ), which is proportional to the effective index ( ) of the supermode (, where is the grating period). Hence, there are two different rejection bands, one for each supermode. The width of each rejection band is proportional to the refractive index modulation of the grating. The two quantities and give an intuitive relation between the center separation and the widths of the rejection bands. In the grating assisted coupler,. Thus the rejection bands of the supermodes essentially coincide. In contrast, in the dispersion inverted coupler,, so the supermodes have well-separated rejection bands. The grating assisted coupler can now be understood as an add drop multiplexer working in reflection. The reflected light from wavelengths within both rejection bands (coinciding region) couples out to the opposite core from where they entered [4]. The dispersion inverted interference coupler works in transmission. To clarify the dispersion and interference effects taking place, we show first the accumulated phase for the two supermodes over the length of the grating structure used in the experiments in Fig. 3 as a function of wavelength. The diagram shows the calculated phase accrued over the length of the device for each supermode. The solid line represents the phase of the fundamental mode and the dashed line the phase of the second order mode. is a constant. The results are based on estimations of the grating strength and effective index of the two supermodes (see Section III for grating and waveguide estimations). It shows the deviations from a straight line leading up to and away from each mode s rejection band, marked with gray boxes. In the wavelength region between the two rejection bands, both supermodes experience strong dispersion, but of opposite sign. However, the grating-induced dispersion on the shorter and longer wavelength sides of the two bandgaps is of the same sign. This difference is very important for the functionality of the device, as the only important factor is the accumulated difference in phase between the modes. This is highlighted in Fig. 4, which shows the difference in phase between the two supermodes; the rejection bands are marked with gray boxes. Most wavelengths propagate unperturbed through the grating structure, and for those wavelengths, the supermodes accrue a constant difference in phase (indicated by the dashed line at ). The only features, in practice, that deviate from the constant difference in phase between the supermodes are grating induced. Consequently, the grating parameters are adjusted so that at the end of the grating, the accumulated

3 ÅSLUND et al.: ADD DROP MULTIPLEXING 1587 Fig. 4. Difference in phase at the end of the grating structure for two supermodes as a function of wavelength. Gray boxes mark the position of each supermode s rejection band. Fig. 6. A cross-section of the twin core fiber used in the experiment. Fig. 5. Grating-induced group delay of device as a function of wavelength. Gray boxes mark the position of each supermode s rejection band. grating-induced difference in phase in the wavelength region between the supermodes equals. This grating-induced phase shift will invert the interference pattern, and light will couple out to the opposite core. In other words, wavelengths between the two rejection bands experience one more intensity maximum over the length of the grating (see Fig. 2). In an earlier paper [6], we theoretically designed an add drop multiplexer within a two-moded planar waveguide based on this principle. In this paper, we verify experimentally the predicted effect, and also show that the supermodes of a twin core structure can be used in this fashion. In Fig. 5, the group delay due to the presence of the grating is shown. Gray boxes mark the position of the rejection band of each supermode. In the middle of the drop band, there is zero group delay, but as the grating is unapodized there is some ripple present. III. EXPERIMENT All experiments were carried out in a twin-core fiber instead of in directional couplers, as it was readily available (estimated data: core center separation 13.3 m, core diameter 6.8 m, cladding refractive index 1.443, and core refractive index 1.449). A photograph of the twin-core fiber cross-section using transmitted white light can be seen in Fig. 6. The gratings were directly written through a phase mask ( nm, mm) by translating an ultraviolet (UV) beam (frequency-doubled continuous-wave Ar kj/cm, nm) along the fiber. The fiber was hydrogen loaded (170 atm, 80 C, 72 h) before grating writing proceeded. The measurement setup is shown in Fig. 7. It allows free choice of supermode excitation/collection, polarization, and relative phase difference between the modes at the end of the twin-core fiber. The choice of mode excitation is provided by butt coupling to and from the twin cored fiber with standard si1ngle-mode fiber mounted on three axis positioning stages (labeled A and E in the figure). The choice of polarization is provided by an in-line polarizer before the input butt-coupling takes place. The control of the relative phase difference between the modes is determined by cutting back a section of the twin-core fiber without a grating in it for rough adjustment and stretching the remaining section of fiber between stages B and C without a grating with a micrometer precision controlled stage (labeled B in the figure) for fine tuning. The near field of the output of the twin-core fiber can be monitored before grating writing commences, to ensure that the UV light illuminates the cores uniformly so that no core shields the other. The near field is then imaged onto a vidicon camera by replacing the fiber on stage A with a lens. Though great care was taken, it cannot be guaranteed that the fiber was free from slight twisting due to limitations with the fiber holders and the elliptical shape of the fiber. The transmission properties were measured using the amplified spontaneous emission from an erbium-doped fiber amplifier as source and collecting the transmitted power with an optical spectrum analyzer. A weak grating was first written, thus minimizing dispersion effects, to determine the separation of the rejection band. The wavelength separation was found to be 0.23 nm, which corresponds to a and a beat length in the fiber of mm. The sought dispersion effect is proportional to the product of the grating length and strength. This gives some freedom in the choice of parameters. For spectral clarity, we chose to write the gratings as long as possible ( mm) to allow the rejection bands to be as narrow as possible. A reliable measure of the actual rejection depth as a measure of the grating strength for each supermode could not be measured due to interference effects between the supermodes. After three attempts with varying writing speeds, we found the correct grating strength. The fiber was cleaved just before the start

4 1588 JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 20, NO. 8, AUGUST 2002 Fig. 7. Measurement setup. A and E are xyz-positioning stages, B is a z-positioning stage, and C and D are fixed fiber mounts. Fig. 8. Spectral transmissivity for the drop (solid line) and the throughput port (dashed line). of the grating on one side, and 100 mm beyond the grating on the other side, to allow cutback and stretching for phase adjustment. The fiber was subsequently cleaved to a length approximately 1 mm short of an interference peak, which was found by monitoring the near field. This allowed the phase difference between the modes to be fully adjusted by stretching to give an interference maximum. IV. RESULTS AND DISCUSSION The typical transmission results for gratings with near optimum strength are displayed in Fig. 8. The dashed line represents the transmissivity of the throughput port, and the solid line represents the transmissivity of the drop/add port. The two gray boxes mark the locations for each of the supermode rejection bands. The maximum rejection of the throughput port is 15 db, and the maximum transmissivity of the drop/add port is 18 db. These results should be compared with the optimal theoretical results in Fig. 9, where the dashed line represents the transmissivity of the throughput port and the solid line represents the transmissivity of the drop/add port. Fig. 9 was constructed as follows. As discussed earlier, we took the experimentally measured Bragg wavelengths to find the effective indexes of the supermodes. Using the length of the grating, we then used our theoretical model [6] to identify the value of leading to the highest extinction ratio, which was found to be. The resulting spectral response is shown in Fig. 9. Note that the rejection ratio in this figure is 100%, which is higher than in [6]. This is possible as the exit modes are equally excited by the supermodes, which was not the case in [6]. Further, the previous statement for dispersion inverted interference devices is verified as. Fig. 9. Theoretical spectral transmissivity for the add/drop (solid line) and the throughput port (dashed line). The essential features of the experimental response of the device follow the theoretical predictions very closely, and the difference is attributed to poor fiber geometry. There was evidence for poor fiber uniformity, as interference effects with multiple periodicities were taking place over the whole spectrum. This suggested that the two cores had different propagation constants and/or possibly supported another set of supermodes. The central dip in the drop channel of Fig. 8 is probably from reflecting cross-coupling from one supermode to the other due to asymmetrical grating writing. It can be removed in principle by writing a transversally uniform grating. The response of the device is in principle fully symmetric, so the drop or add ports should be interchangeable, and indeed in practice we found this to be qualitatively true. Subsequent aging of the theoretical device will decrease the rejection ratio by reducing the phase difference. When the grating strength of the theoretical device has dropped by 2%, the rejection level of the throughput port has reduced to 20 db from 100%, and the rejection bandwidth at 10 db rejection level is reduced by 2.5%. To simplify device fabrication, the cores should be closer together, thus shortening the grating length restrictions. In the end, the twin-core region should be made by fusing two photosensitive fibers together to form a purpose-made twin-core directional coupler of suitable length. Fine-tuning of the relative phase between the modes could then be accomplished by UV-tuning of the short twin-core region leading up to or away from the grating section. The known effect of slight mismatch between cores of an directional coupler is not a serious impediment to applications in the telecom industry; and that effect on our device is equivalent and should therefore not be a serious constraint.

5 ÅSLUND et al.: ADD DROP MULTIPLEXING 1589 The main practical limitation of the device is that the spectral response is confined to the region between the two rejection bands, which is given by the difference in effective index of the supermodes. However, the performance of the device is not affected by the detailed shape of the spectral response of the grating. Therefore, the usual design tools can be brought to bear to improve the filtering characteristics of the device. V. CONCLUSIONS We have presented experimental results showing a new way to manufacture an all-fiber optical add drop multiplexer. The device is located inside the twin-core region of a fiber and relies on Bragg grating dispersion inverted interference in the forward direction for its functionality. Initial results show a 15-dB spectral efficiency. REFERENCES [1] G. E. Keiser, A review of WDM technology and applications, Opt. Fib. Technol., vol. 5, no. 1, pp. 3 39, Jan [2] F. Bilodeau, D. C. Johnson, S. Theriault, B. Malo, J. Albert, and K. O. Hill, An all-fiber dense-wavelength-divison multiplexer demultiplexer using photoimprinted Bragg gratings, Photon. Technol. Lett., vol. 7, pp , Apr [3] J. L. Archambault, P. St. J. Russell, S. Barcelos, P. Hua, and L. Reekie, Grating-frustrated coupler: a novel channel-dropping filter in single-mode optical fiber, Opt. Lett., vol. 19, no. 3, pp , Feb [4] I. Baumann, J. Seifert, W. Novak, and M. Sauer, Compact all-fiber add drop multiplexer using fiber Bragg gratings, Photon. Technol. Lett., vol. 8, pp , Oct [5] R. Kashyap, G. D. Maxwell, and B. J. Ainslie, Laser-trimmed 4-port bandpass filter fabricated in single-mode photosensitive Ge-doped planar wave-guide, Photon. Technol. Lett., vol. 5, pp , Feb [6] M. Åslund, L. Poladian, J. Canning, and C. M. de Sterke, Add drop multiplexing by grating-induced dispersion in multimode interference device, Photon. Technol. Lett., vol. 13, pp , Sept [7] L. Dong, P. Hua, T. A. Birks, L. Reekie, and P. S. Russell, Novel add/drop filters for wavelength-division-multiplexing optical fiber systems using a Bragg grating assisted mismatched coupler, Photon. Technol. Lett., vol. 8, pp , Dec [8] A.-C. Jacob-Poulin, R. Valle, S. LaRochelle, D. Faucher, and G. R. Atkins, Channel-dropping filter based on a grating-frustrated two-core fiber, J. Lightwave Technol., vol. 18, pp , May [9] A. W. Snyder and J. D. Love, Optical Waveguide Theory. London, U.K.: Chapman and Hall, Mattias Åslund, photograph and biography not available at the time of publication. Leon Poladian, photograph and biography not available at the time of publication. John Canning, photograph and biography not available at the time of publication. C. Martijn de Sterke, photograph and biography not available at the time of publication.

All-Fiber Wavelength-Tunable Acoustooptic Switches Based on Intermodal Coupling in Fibers

All-Fiber Wavelength-Tunable Acoustooptic Switches Based on Intermodal Coupling in Fibers 1864 JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 20, NO. 10, OCTOBER 2002 All-Fiber Wavelength-Tunable Acoustooptic Switches Based on Intermodal Coupling in Fibers Hee Su Park, Kwang Yong Song, Seok Hyun Yun,

More information

Title. Author(s)Saitoh, Fumiya; Saitoh, Kunimasa; Koshiba, Masanori. CitationOptics Express, 18(5): Issue Date Doc URL.

Title. Author(s)Saitoh, Fumiya; Saitoh, Kunimasa; Koshiba, Masanori. CitationOptics Express, 18(5): Issue Date Doc URL. Title A design method of a fiber-based mode multi/demultip Author(s)Saitoh, Fumiya; Saitoh, Kunimasa; Koshiba, Masanori CitationOptics Express, 18(5): 4709-4716 Issue Date 2010-03-01 Doc URL http://hdl.handle.net/2115/46825

More information

Optical add drop multiplexers based on the antisymmetric waveguide Bragg grating

Optical add drop multiplexers based on the antisymmetric waveguide Bragg grating Optical add drop multiplexers based on the antisymmetric waveguide Bragg grating Jose M. Castro, David F. Geraghty, Seppo Honkanen, Christoph M. Greiner, Dmitri Iazikov, and Thomas W. Mossberg A novel

More information

AMACH Zehnder interferometer (MZI) based on the

AMACH Zehnder interferometer (MZI) based on the 1284 JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 23, NO. 3, MARCH 2005 Optimal Design of Planar Wavelength Circuits Based on Mach Zehnder Interferometers and Their Cascaded Forms Qian Wang and Sailing He, Senior

More information

Optical Polarization Filters and Splitters Based on Multimode Interference Structures using Silicon Waveguides

Optical Polarization Filters and Splitters Based on Multimode Interference Structures using Silicon Waveguides International Journal of Engineering and Technology Volume No. 7, July, 01 Optical Polarization Filters and Splitters Based on Multimode Interference Structures using Silicon Waveguides 1 Trung-Thanh Le,

More information

A Novel Vertical Directional Coupler Switch With Switching-Operation-Induced Section and Extinction-Ratio-Enhanced Section

A Novel Vertical Directional Coupler Switch With Switching-Operation-Induced Section and Extinction-Ratio-Enhanced Section JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 20, NO. 9, SEPTEMBER 2002 1773 A Novel Vertical Directional Coupler Switch With Switching-Operation-Induced Section and Extinction-Ratio-Enhanced Section Sung-Chan

More information

Optical Communications and Networking 朱祖勍. Sept. 25, 2017

Optical Communications and Networking 朱祖勍. Sept. 25, 2017 Optical Communications and Networking Sept. 25, 2017 Lecture 4: Signal Propagation in Fiber 1 Nonlinear Effects The assumption of linearity may not always be valid. Nonlinear effects are all related to

More information

Bragg and fiber gratings. Mikko Saarinen

Bragg and fiber gratings. Mikko Saarinen Bragg and fiber gratings Mikko Saarinen 27.10.2009 Bragg grating - Bragg gratings are periodic perturbations in the propagating medium, usually periodic variation of the refractive index - like diffraction

More information

Novel Full-Cycle-Coupler-Based Optical Add Drop Multiplexer and Performance Characteristics at 40-Gb/s WDM Networks

Novel Full-Cycle-Coupler-Based Optical Add Drop Multiplexer and Performance Characteristics at 40-Gb/s WDM Networks 1828 JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 21, NO. 8, AUGUST 2003 Novel Full-Cycle-Coupler-Based Optical Add Drop Multiplexer and Performance Characteristics at 40-Gb/s WDM Networks Christos Riziotis,

More information

Polarization Mode Dispersion compensation in WDM system using dispersion compensating fibre

Polarization Mode Dispersion compensation in WDM system using dispersion compensating fibre Polarization Mode Dispersion compensation in WDM system using dispersion compensating fibre AMANDEEP KAUR (Assist. Prof.) ECE department GIMET Amritsar Abstract: In this paper, the polarization mode dispersion

More information

CHIRPED FIBER BRAGG GRATING (CFBG) BY ETCHING TECHNIQUE FOR SIMULTANEOUS TEMPERATURE AND REFRACTIVE INDEX SENSING

CHIRPED FIBER BRAGG GRATING (CFBG) BY ETCHING TECHNIQUE FOR SIMULTANEOUS TEMPERATURE AND REFRACTIVE INDEX SENSING CHIRPED FIBER BRAGG GRATING (CFBG) BY ETCHING TECHNIQUE FOR SIMULTANEOUS TEMPERATURE AND REFRACTIVE INDEX SENSING Siti Aisyah bt. Ibrahim and Chong Wu Yi Photonics Research Center Department of Physics,

More information

Keysight Technologies Using a Wide-band Tunable Laser for Optical Filter Measurements

Keysight Technologies Using a Wide-band Tunable Laser for Optical Filter Measurements Keysight Technologies Using a Wide-band Tunable Laser for Optical Filter Measurements Article Reprint NASA grants Keysight Technologies permission to distribute the article Using a Wide-band Tunable Laser

More information

Supplementary Figures

Supplementary Figures Supplementary Figures Supplementary Figure 1: Mach-Zehnder interferometer (MZI) phase stabilization. (a) DC output of the MZI with and without phase stabilization. (b) Performance of MZI stabilization

More information

Silicon Photonic Device Based on Bragg Grating Waveguide

Silicon Photonic Device Based on Bragg Grating Waveguide Silicon Photonic Device Based on Bragg Grating Waveguide Hwee-Gee Teo, 1 Ming-Bin Yu, 1 Guo-Qiang Lo, 1 Kazuhiro Goi, 2 Ken Sakuma, 2 Kensuke Ogawa, 2 Ning Guan, 2 and Yong-Tsong Tan 2 Silicon photonics

More information

Optical Fibers p. 1 Basic Concepts p. 1 Step-Index Fibers p. 2 Graded-Index Fibers p. 4 Design and Fabrication p. 6 Silica Fibers p.

Optical Fibers p. 1 Basic Concepts p. 1 Step-Index Fibers p. 2 Graded-Index Fibers p. 4 Design and Fabrication p. 6 Silica Fibers p. Preface p. xiii Optical Fibers p. 1 Basic Concepts p. 1 Step-Index Fibers p. 2 Graded-Index Fibers p. 4 Design and Fabrication p. 6 Silica Fibers p. 6 Plastic Optical Fibers p. 9 Microstructure Optical

More information

Fiber loop reflector as a versatile all-fiber component

Fiber loop reflector as a versatile all-fiber component Fiber loop reflector as a versatile all-fiber component B.P. Pal 1, * G. Thursby, * Naveen Kumar, ** and M.R. Shenoy ** * Department of Electronic and Electrical Engineering University of Strathclyde,

More information

Stable dual-wavelength oscillation of an erbium-doped fiber ring laser at room temperature

Stable dual-wavelength oscillation of an erbium-doped fiber ring laser at room temperature Stable dual-wavelength oscillation of an erbium-doped fiber ring laser at room temperature Donghui Zhao.a, Xuewen Shu b, Wei Zhang b, Yicheng Lai a, Lin Zhang a, Ian Bennion a a Photonics Research Group,

More information

UNIT - 7 WDM CONCEPTS AND COMPONENTS

UNIT - 7 WDM CONCEPTS AND COMPONENTS UNIT - 7 WDM CONCEPTS AND COMPONENTS WDM concepts, overview of WDM operation principles, WDM standards, Mach-Zehender interferometer, multiplexer, Isolators and circulators, direct thin film filters, active

More information

Integrated grating-assisted coarse/dense WDM multiplexers

Integrated grating-assisted coarse/dense WDM multiplexers Integrated grating-assisted coarse/dense WDM multiplexers Linping Shen *a, Chenglin Xu b, and Wei-Ping Huang b a Apollo Inc., 1057 Main Street W., Hamilton, ON, Canada L8S 1B7 * lpshen@apollophotonics.com;

More information

CHAPTER 2 POLARIZATION SPLITTER- ROTATOR BASED ON A DOUBLE- ETCHED DIRECTIONAL COUPLER

CHAPTER 2 POLARIZATION SPLITTER- ROTATOR BASED ON A DOUBLE- ETCHED DIRECTIONAL COUPLER CHAPTER 2 POLARIZATION SPLITTER- ROTATOR BASED ON A DOUBLE- ETCHED DIRECTIONAL COUPLER As we discussed in chapter 1, silicon photonics has received much attention in the last decade. The main reason is

More information

SUPPLEMENTARY INFORMATION

SUPPLEMENTARY INFORMATION Supplementary Information S1. Theory of TPQI in a lossy directional coupler Following Barnett, et al. [24], we start with the probability of detecting one photon in each output of a lossy, symmetric beam

More information

Fiber Bragg grating sequential UV-writing method with real-time interferometric sidediffraction

Fiber Bragg grating sequential UV-writing method with real-time interferometric sidediffraction Fiber Bragg grating sequential UV-writing method with real-time interferometric sidediffraction position monitoring Kuei-Chu Hsu Department of Photonics & Institute of Electro-Optical Engineering, National

More information

UNIT - 7 WDM CONCEPTS AND COMPONENTS

UNIT - 7 WDM CONCEPTS AND COMPONENTS UNIT - 7 LECTURE-1 WDM CONCEPTS AND COMPONENTS WDM concepts, overview of WDM operation principles, WDM standards, Mach-Zehender interferometer, multiplexer, Isolators and circulators, direct thin film

More information

SIGNAL processing in the optical domain is considered

SIGNAL processing in the optical domain is considered 1410 JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 23, NO. 3, MARCH 2005 All-Optical Microwave Filters Using Uniform Fiber Bragg Gratings With Identical Reflectivities Fei Zeng, Student Member, IEEE, Student Member,

More information

New Design of 1x3 Wavelength Demultiplexer Based on Tilted Grating in Glass Waveguide for First Window Operating Wavelength

New Design of 1x3 Wavelength Demultiplexer Based on Tilted Grating in Glass Waveguide for First Window Operating Wavelength Australian Journal of Basic and Applied Sciences, 3(3): 2607-2613, 2009 ISSN 1991-8178 New Design of 1x3 Wavelength Demultiplexer Based on Tilted Grating in Glass Waveguide for First Window Operating Wavelength

More information

Optimization of Uniform Fiber Bragg Grating Reflection Spectra for Maximum Reflectivity and Narrow Bandwidth

Optimization of Uniform Fiber Bragg Grating Reflection Spectra for Maximum Reflectivity and Narrow Bandwidth ISSN (e): 225 35 Vol, 5 Issue,2 February 25 International Journal of Computational Engineering Research (IJCER) Optimization of Uniform Fiber Bragg Grating Reflection Spectra for Maximum Reflectivity and

More information

Optical Fiber Devices and Their Applications

Optical Fiber Devices and Their Applications Optical Fiber Devices and Their Applications Yutaka SASAKI Faculty of Engineering Ibaraki University --, Nakanarusawa-cho, Hitachi, Ibaraki 6-85, Japan ABSTRACT: - Recent progress in research on optical

More information

Module 19 : WDM Components

Module 19 : WDM Components Module 19 : WDM Components Lecture : WDM Components - I Part - I Objectives In this lecture you will learn the following WDM Components Optical Couplers Optical Amplifiers Multiplexers (MUX) Insertion

More information

Electronically switchable Bragg gratings provide versatility

Electronically switchable Bragg gratings provide versatility Page 1 of 5 Electronically switchable Bragg gratings provide versatility Recent advances in ESBGs make them an optimal technological fabric for WDM components. ALLAN ASHMEAD, DigiLens Inc. The migration

More information

THE WIDE USE of optical wavelength division multiplexing

THE WIDE USE of optical wavelength division multiplexing 1322 IEEE JOURNAL OF QUANTUM ELECTRONICS, VOL. 35, NO. 9, SEPTEMBER 1999 Coupling of Modes Analysis of Resonant Channel Add Drop Filters C. Manolatou, M. J. Khan, Shanhui Fan, Pierre R. Villeneuve, H.

More information

SUPPLEMENTARY INFORMATION

SUPPLEMENTARY INFORMATION Supplementary Information "Large-scale integration of wavelength-addressable all-optical memories in a photonic crystal chip" SUPPLEMENTARY INFORMATION Eiichi Kuramochi*, Kengo Nozaki, Akihiko Shinya,

More information

Silicon photonic devices based on binary blazed gratings

Silicon photonic devices based on binary blazed gratings Silicon photonic devices based on binary blazed gratings Zhiping Zhou Li Yu Optical Engineering 52(9), 091708 (September 2013) Silicon photonic devices based on binary blazed gratings Zhiping Zhou Li Yu

More information

Splice losses in holey optical fibers

Splice losses in holey optical fibers Splice losses in holey optical fibers J.T. Lizier and G.E. Town School of Electrical and Information Engineering (J03), University of Sydney, NSW 2006, Australia. Tel: +612-9351-2110, Fax: +612-9351-3847,

More information

Ratiometric Wavelength Monitor Based on Singlemode-Multimode-Singlemode Fiber Structure

Ratiometric Wavelength Monitor Based on Singlemode-Multimode-Singlemode Fiber Structure Dublin Institute of Technology ARROW@DIT Articles School of Electrical and Electronic Engineering 8-1-1 Ratiometric Wavelength Monitor Based on Singlemode-Multimode-Singlemode Fiber Structure Agus Hatta

More information

Optical Amplifiers Photonics and Integrated Optics (ELEC-E3240) Zhipei Sun Photonics Group Department of Micro- and Nanosciences Aalto University

Optical Amplifiers Photonics and Integrated Optics (ELEC-E3240) Zhipei Sun Photonics Group Department of Micro- and Nanosciences Aalto University Photonics Group Department of Micro- and Nanosciences Aalto University Optical Amplifiers Photonics and Integrated Optics (ELEC-E3240) Zhipei Sun Last Lecture Topics Course introduction Ray optics & optical

More information

Hybrid Integration Technology of Silicon Optical Waveguide and Electronic Circuit

Hybrid Integration Technology of Silicon Optical Waveguide and Electronic Circuit Hybrid Integration Technology of Silicon Optical Waveguide and Electronic Circuit Daisuke Shimura Kyoko Kotani Hiroyuki Takahashi Hideaki Okayama Hiroki Yaegashi Due to the proliferation of broadband services

More information

SSRG International Journal of Electronics and Communication Engineering (SSRG-IJECE) Volume 2 Issue 6 June 2015

SSRG International Journal of Electronics and Communication Engineering (SSRG-IJECE) Volume 2 Issue 6 June 2015 SSRG International Journal of Electronics and Communication Engineering (SSRG-IJECE) Volume Issue 6 June 15 Designing of a Long Period Fiber Grating (LPFG) using Optigrating Simulation Software Mr. Puneet

More information

Compact two-mode (de)multiplexer based on symmetric Y-junction and Multimode interference waveguides

Compact two-mode (de)multiplexer based on symmetric Y-junction and Multimode interference waveguides Compact two-mode (de)multiplexer based on symmetric Y-junction and Multimode interference waveguides Yaming Li, Chong Li, Chuanbo Li, Buwen Cheng, * and Chunlai Xue State Key Laboratory on Integrated Optoelectronics,

More information

A novel tunable diode laser using volume holographic gratings

A novel tunable diode laser using volume holographic gratings A novel tunable diode laser using volume holographic gratings Christophe Moser *, Lawrence Ho and Frank Havermeyer Ondax, Inc. 85 E. Duarte Road, Monrovia, CA 9116, USA ABSTRACT We have developed a self-aligned

More information

Photonics and Optical Communication

Photonics and Optical Communication Photonics and Optical Communication (Course Number 300352) Spring 2007 Dr. Dietmar Knipp Assistant Professor of Electrical Engineering http://www.faculty.iu-bremen.de/dknipp/ 1 Photonics and Optical Communication

More information

Technical Brief #5. Power Monitors

Technical Brief #5. Power Monitors Technical Brief #5 Power Monitors What is a power monitor?...2 Evanescent field power monitor...2 Responsivity...2 Insertion loss...3 Polarization Dependent Responsivity (PDR)...4 Polarization Dependent

More information

Spectral Characteristics of Uniform Fiber Bragg Grating With Different Grating Length and Refractive Index Variation

Spectral Characteristics of Uniform Fiber Bragg Grating With Different Grating Length and Refractive Index Variation Spectral Characteristics of Uniform Fiber Bragg Grating With Different Grating Length and efractive Index Variation Chiranjit Ghosh 1, Quazi Md. Alfred 2, Biswajit Ghosh 3 ME (EIE) Student, University

More information

Si-EPIC Workshop: Silicon Nanophotonics Fabrication Directional Couplers

Si-EPIC Workshop: Silicon Nanophotonics Fabrication Directional Couplers Si-EPIC Workshop: Silicon Nanophotonics Fabrication Directional Couplers June 26, 2012 Dr. Lukas Chrostowski Directional Couplers Eigenmode solver approach Objectives Model the power coupling in a directional

More information

Fiber-Optic Polarizer Using Resonant Tunneling through a Multilayer Overlay

Fiber-Optic Polarizer Using Resonant Tunneling through a Multilayer Overlay Fiber-Optic Polarizer Using Resonant Tunneling through a Multilayer Overlay Arun Kumar, Rajeev Jindal, and R. K. Varshney Department of Physics, Indian Institute of Technology, New Delhi 110 016 India

More information

Performance Limitations of WDM Optical Transmission System Due to Cross-Phase Modulation in Presence of Chromatic Dispersion

Performance Limitations of WDM Optical Transmission System Due to Cross-Phase Modulation in Presence of Chromatic Dispersion Performance Limitations of WDM Optical Transmission System Due to Cross-Phase Modulation in Presence of Chromatic Dispersion M. A. Khayer Azad and M. S. Islam Institute of Information and Communication

More information

Title. Author(s)Fujisawa, Takeshi; Koshiba, Masanori. CitationOptics Letters, 31(1): Issue Date Doc URL. Rights. Type.

Title. Author(s)Fujisawa, Takeshi; Koshiba, Masanori. CitationOptics Letters, 31(1): Issue Date Doc URL. Rights. Type. Title Polarization-independent optical directional coupler Author(s)Fujisawa, Takeshi; Koshiba, Masanori CitationOptics Letters, 31(1): 56-58 Issue Date 2006 Doc URL http://hdl.handle.net/2115/948 Rights

More information

Figure 1 Basic waveguide structure

Figure 1 Basic waveguide structure Recent Progress in SOI Nanophotonic Waveguides D. Van Thourhout, P. Dumon, W. Bogaerts, G. Roelkens, D. Taillaert, G. Priem, R. Baets IMEC-Ghent University, Department of Information Technology, St. Pietersnieuwstraat

More information

Property improvement of flat-top 50 GHz-88 ch arrayed waveguide grating using phase correction waveguides

Property improvement of flat-top 50 GHz-88 ch arrayed waveguide grating using phase correction waveguides Property improvement of flat-top 50 GHz-88 ch arrayed waveguide grating using phase correction waveguides Kazutaka Nara 1a) and Noritaka Matsubara 2 1 FITEL Photonics Laboratory, Furukawa Electric Co.,

More information

Plane wave excitation by taper array for optical leaky waveguide antenna

Plane wave excitation by taper array for optical leaky waveguide antenna LETTER IEICE Electronics Express, Vol.15, No.2, 1 6 Plane wave excitation by taper array for optical leaky waveguide antenna Hiroshi Hashiguchi a), Toshihiko Baba, and Hiroyuki Arai Graduate School of

More information

Performance Evaluation of 32 Channel DWDM System Using Dispersion Compensation Unit at Different Bit Rates

Performance Evaluation of 32 Channel DWDM System Using Dispersion Compensation Unit at Different Bit Rates Performance Evaluation of 32 Channel DWDM System Using Dispersion Compensation Unit at Different Bit Rates Simarpreet Kaur Gill 1, Gurinder Kaur 2 1Mtech Student, ECE Department, Rayat- Bahra University,

More information

FABRICATION OF FIBER BRAGG GRATINGS IN HIGH GERMANIA BORON CO-DOPED OPTICAL FIBER BY THE PHASE MASK METHOD

FABRICATION OF FIBER BRAGG GRATINGS IN HIGH GERMANIA BORON CO-DOPED OPTICAL FIBER BY THE PHASE MASK METHOD FABRICATION OF FIBER BRAGG GRATINGS IN HIGH GERMANIA BORON 11 Jurnal Teknologi, 37(D) Dis. 2002: 11 18 Universiti Teknologi Malaysia FABRICATION OF FIBER BRAGG GRATINGS IN HIGH GERMANIA BORON CO-DOPED

More information

Mechanism of intrinsic wavelength tuning and sideband asymmetry in a passively mode-locked soliton fiber ring laser

Mechanism of intrinsic wavelength tuning and sideband asymmetry in a passively mode-locked soliton fiber ring laser 28 J. Opt. Soc. Am. B/Vol. 17, No. 1/January 2000 Man et al. Mechanism of intrinsic wavelength tuning and sideband asymmetry in a passively mode-locked soliton fiber ring laser W. S. Man, H. Y. Tam, and

More information

ADD/DROP filters that access one channel of a

ADD/DROP filters that access one channel of a IEEE JOURNAL OF QUANTUM ELECTRONICS, VOL 35, NO 10, OCTOBER 1999 1451 Mode-Coupling Analysis of Multipole Symmetric Resonant Add/Drop Filters M J Khan, C Manolatou, Shanhui Fan, Pierre R Villeneuve, H

More information

Multi-wavelength laser generation with Bismuthbased Erbium-doped fiber

Multi-wavelength laser generation with Bismuthbased Erbium-doped fiber Multi-wavelength laser generation with Bismuthbased Erbium-doped fiber H. Ahmad 1, S. Shahi 1 and S. W. Harun 1,2* 1 Photonics Research Center, University of Malaya, 50603 Kuala Lumpur, Malaysia 2 Department

More information

Optical signal processing for fiber Bragg grating based wear sensors

Optical signal processing for fiber Bragg grating based wear sensors University of Wollongong Research Online Faculty of Informatics - Papers (Archive) Faculty of Engineering and Information Sciences 2005 Optical signal processing for fiber Bragg grating based wear sensors

More information

Dispersion measurement in optical fibres over the entire spectral range from 1.1 mm to 1.7 mm

Dispersion measurement in optical fibres over the entire spectral range from 1.1 mm to 1.7 mm 15 February 2000 Ž. Optics Communications 175 2000 209 213 www.elsevier.comrlocateroptcom Dispersion measurement in optical fibres over the entire spectral range from 1.1 mm to 1.7 mm F. Koch ), S.V. Chernikov,

More information

Linear cavity erbium-doped fiber laser with over 100 nm tuning range

Linear cavity erbium-doped fiber laser with over 100 nm tuning range Linear cavity erbium-doped fiber laser with over 100 nm tuning range Xinyong Dong, Nam Quoc Ngo *, and Ping Shum Network Technology Research Center, School of Electrical & Electronics Engineering, Nanyang

More information

Chapter 5 5.1 What are the factors that determine the thickness of a polystyrene waveguide formed by spinning a solution of dissolved polystyrene onto a substrate? density of polymer concentration of polymer

More information

Realization of Polarization-Insensitive Optical Polymer Waveguide Devices

Realization of Polarization-Insensitive Optical Polymer Waveguide Devices 644 Realization of Polarization-Insensitive Optical Polymer Waveguide Devices Kin Seng Chiang,* Sin Yip Cheng, Hau Ping Chan, Qing Liu, Kar Pong Lor, and Chi Kin Chow Department of Electronic Engineering,

More information

Coupling effects of signal and pump beams in three-level saturable-gain media

Coupling effects of signal and pump beams in three-level saturable-gain media Mitnick et al. Vol. 15, No. 9/September 1998/J. Opt. Soc. Am. B 2433 Coupling effects of signal and pump beams in three-level saturable-gain media Yuri Mitnick, Moshe Horowitz, and Baruch Fischer Department

More information

Stabilisation of Linear-cavity Fibre Laser Using a Saturable Absorber

Stabilisation of Linear-cavity Fibre Laser Using a Saturable Absorber Edith Cowan University Research Online ECU Publications 2011 2011 Stabilisation of Linear-cavity Fibre Laser Using a Saturable Absorber David Michel Edith Cowan University Feng Xiao Edith Cowan University

More information

BEAM splitters are indispensable elements of integrated

BEAM splitters are indispensable elements of integrated 3900 JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 23, NO. 11, NOVEMBER 2005 A Compact 90 Three-Branch Beam Splitter Based on Resonant Coupling H. A. Jamid, M. Z. M. Khan, and M. Ameeruddin Abstract A compact

More information

OPTI510R: Photonics. Khanh Kieu College of Optical Sciences, University of Arizona Meinel building R.626

OPTI510R: Photonics. Khanh Kieu College of Optical Sciences, University of Arizona Meinel building R.626 OPTI510R: Photonics Khanh Kieu College of Optical Sciences, University of Arizona kkieu@optics.arizona.edu Meinel building R.626 Announcements Homework #4 is due today, HW #5 is assigned (due April 8)

More information

GREAT interest has recently been shown for photonic

GREAT interest has recently been shown for photonic JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 22, NO. 1, JANUARY 2004 11 Air-Guiding Photonic Bandgap Fibers: Spectral Properties, Macrobending Loss, and Practical Handling Theis P. Hansen, Jes Broeng, Christian

More information

Title. CitationIEEE photonics journal, 8(3): Issue Date Doc URL. Rights. Type. File Information.

Title. CitationIEEE photonics journal, 8(3): Issue Date Doc URL. Rights. Type. File Information. Title Theoretical Investigation of Six-Mode Multi/Demultip Author(s)Nishimoto, Shoko; Fujisawa, Takeshi; Sasaki, Yusuke; CitationIEEE photonics journal, 8(3): 7802908 Issue Date 2016-06 Doc URL http://hdl.handle.net/2115/62373

More information

Fiber-based components. by: Khanh Kieu

Fiber-based components. by: Khanh Kieu Fiber-based components by: Khanh Kieu Projects 1. Handling optical fibers, numerical aperture 2. Measurement of fiber attenuation 3. Connectors and splices 4. Free space coupling of laser into fibers 5.

More information

High-power All-Fiber components: The missing link for high power fiber lasers

High-power All-Fiber components: The missing link for high power fiber lasers High- All-Fiber components: The missing link for high lasers François Gonthier, Lilian Martineau, Nawfel Azami, Mathieu Faucher, François Séguin, Damien Stryckman, Alain Villeneuve ITF Optical Technologies

More information

Improved Extinction Ratios for Both Cross and Bar States Using Two-Section Ultra Short Vertical Directional Couplers

Improved Extinction Ratios for Both Cross and Bar States Using Two-Section Ultra Short Vertical Directional Couplers Jpn. J. Appl. Phys. Vol. 39 (000) pp. 6555 6559 Part 1, No. 1A, Decemer 000 c 000 The Japan Society of Applied Physics Improved Extinction Ratios for Both Cross and Bar States Using Two-Section Ultra Short

More information

Spectral Characteristics of Mechanically Induced of Ultralong Period Fiber Gratings (UPFG) as a Pressure Sensor.

Spectral Characteristics of Mechanically Induced of Ultralong Period Fiber Gratings (UPFG) as a Pressure Sensor. Spectral Characteristics of Mechanically Induced of Ultralong Period Fiber Gratings (UPFG) as a Pressure Sensor. V. Mishra, V V Dwivedi C.U shah University, Surendranagar, Gujrat Abstract. We report here

More information

UV-written Integrated Optical 1 N Splitters

UV-written Integrated Optical 1 N Splitters UV-written Integrated Optical 1 N Splitters Massimo Olivero *, Mikael Svalgaard COM, Technical University of Denmark, 28 Lyngby, Denmark, Phone: (+45) 4525 5748, Fax: (+45) 4593 6581, svlgrd@com.dtu.dk

More information

Opto-VLSI-based reconfigurable photonic RF filter

Opto-VLSI-based reconfigurable photonic RF filter Research Online ECU Publications 29 Opto-VLSI-based reconfigurable photonic RF filter Feng Xiao Mingya Shen Budi Juswardy Kamal Alameh This article was originally published as: Xiao, F., Shen, M., Juswardy,

More information

BROAD-BAND rare-earth-doped fiber sources have been

BROAD-BAND rare-earth-doped fiber sources have been JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 15, NO. 8, AUGUST 1997 1587 Feedback Effects in Erbium-Doped Fiber Amplifier/Source for Open-Loop Fiber-Optic Gyroscope Hee Gap Park, Kyoung Ah Lim, Young-Jun Chin,

More information

Channel wavelength selectable singleõdualwavelength erbium-doped fiber ring laser

Channel wavelength selectable singleõdualwavelength erbium-doped fiber ring laser Channel wavelength selectable singleõdualwavelength erbium-doped fiber ring laser Tong Liu Yeng Chai Soh Qijie Wang Nanyang Technological University School of Electrical and Electronic Engineering Nanyang

More information

Adaptive multi/demultiplexers for optical signals with arbitrary wavelength spacing.

Adaptive multi/demultiplexers for optical signals with arbitrary wavelength spacing. Edith Cowan University Research Online ECU Publications Pre. 2011 2010 Adaptive multi/demultiplexers for optical signals with arbitrary wavelength spacing. Feng Xiao Edith Cowan University Kamal Alameh

More information

Integrated Photonics based on Planar Holographic Bragg Reflectors

Integrated Photonics based on Planar Holographic Bragg Reflectors Integrated Photonics based on Planar Holographic Bragg Reflectors C. Greiner *, D. Iazikov and T. W. Mossberg LightSmyth Technologies, Inc., 86 W. Park St., Ste 25, Eugene, OR 9741 ABSTRACT Integrated

More information

Vanishing Core Fiber Spot Size Converter Interconnect (Polarizing or Polarization Maintaining)

Vanishing Core Fiber Spot Size Converter Interconnect (Polarizing or Polarization Maintaining) Vanishing Core Fiber Spot Size Converter Interconnect (Polarizing or Polarization Maintaining) The Go!Foton Interconnect (Go!Foton FSSC) is an in-fiber, spot size converting interconnect for convenient

More information

Rogério Nogueira Instituto de Telecomunicações Pólo de Aveiro Departamento de Física Universidade de Aveiro

Rogério Nogueira Instituto de Telecomunicações Pólo de Aveiro Departamento de Física Universidade de Aveiro Fiber Bragg Gratings for DWDM Optical Networks Rogério Nogueira Instituto de Telecomunicações Pólo de Aveiro Departamento de Física Universidade de Aveiro Overview Introduction. Fabrication. Physical properties.

More information

Mach Zehnder Interferometer for Wavelength Division Multiplexing

Mach Zehnder Interferometer for Wavelength Division Multiplexing Mach Zehnder Interferometer for Wavelength Division Multiplexing Ary Syahriar Pusat Pengkajian dan Penerapan Teknologi Informasi dan Elektronika Badan Pengkajian dan Penerapan Teknologi e-mail : ary@inn.bppt.go.id

More information

DBR based passively mode-locked 1.5m semiconductor laser with 9 nm tuning range Moskalenko, V.; Williams, K.A.; Bente, E.A.J.M.

DBR based passively mode-locked 1.5m semiconductor laser with 9 nm tuning range Moskalenko, V.; Williams, K.A.; Bente, E.A.J.M. DBR based passively mode-locked 1.5m semiconductor laser with 9 nm tuning range Moskalenko, V.; Williams, K.A.; Bente, E.A.J.M. Published in: Proceedings of the 20th Annual Symposium of the IEEE Photonics

More information

21. (i) Briefly explain the evolution of fiber optic system (ii) Compare the configuration of different types of fibers. or 22. (b)(i) Derive modal eq

21. (i) Briefly explain the evolution of fiber optic system (ii) Compare the configuration of different types of fibers. or 22. (b)(i) Derive modal eq Unit-1 Part-A FATIMA MICHAEL COLLEGE OF ENGINEERING & TECHNOLOGY Senkottai Village, Madurai Sivagangai Main Road, Madurai - 625 020. [An ISO 9001:2008 Certified Institution] DEPARTMENT OF ELECTRONICS AND

More information

Elements of Optical Networking

Elements of Optical Networking Bruckner Elements of Optical Networking Basics and practice of optical data communication With 217 Figures, 13 Tables and 93 Exercises Translated by Patricia Joliet VIEWEG+ TEUBNER VII Content Preface

More information

Fiber-Optic Communication Systems

Fiber-Optic Communication Systems Fiber-Optic Communication Systems Second Edition GOVIND P. AGRAWAL The Institute of Optics University of Rochester Rochester, NY A WILEY-iNTERSCIENCE PUBLICATION JOHN WILEY & SONS, INC. NEW YORK / CHICHESTER

More information

Dual-wavelength Fibre Biconic Tapering Technology

Dual-wavelength Fibre Biconic Tapering Technology STR/03/053/PM Dual-wavelength Fibre Biconic Tapering Technology W. L. Lim, E. C. Neo, Y. Zhang and C. Wen Abstract A novel technique used to improve current coupling workstations to fabricate dualwavelength

More information

Opto-VLSI based Broadband Reconfigurable Optical Add-Drop Multiplexer

Opto-VLSI based Broadband Reconfigurable Optical Add-Drop Multiplexer Research Online ECU Publications Pre. 2011 2008 Opto-VLSI based Broadband Reconfigurable Optical Add-Drop Multiplexer Feng Xiao Budi Juswardy Kamal Alameh 10.1109/IPGC.2008.4781405 This article was originally

More information

OPTICAL COMMUNICATIONS S

OPTICAL COMMUNICATIONS S OPTICAL COMMUNICATIONS S-108.3110 1 Course program 1. Introduction and Optical Fibers 2. Nonlinear Effects in Optical Fibers 3. Fiber-Optic Components 4. Transmitters and Receivers 5. Fiber-Optic Measurements

More information

Bit error rate and cross talk performance in optical cross connect with wavelength converter

Bit error rate and cross talk performance in optical cross connect with wavelength converter Vol. 6, No. 3 / March 2007 / JOURNAL OF OPTICAL NETWORKING 295 Bit error rate and cross talk performance in optical cross connect with wavelength converter M. S. Islam and S. P. Majumder Department of

More information

Optimisation of DSF and SOA based Phase Conjugators. by Incorporating Noise-Suppressing Fibre Gratings

Optimisation of DSF and SOA based Phase Conjugators. by Incorporating Noise-Suppressing Fibre Gratings Optimisation of DSF and SOA based Phase Conjugators by Incorporating Noise-Suppressing Fibre Gratings Paper no: 1471 S. Y. Set, H. Geiger, R. I. Laming, M. J. Cole and L. Reekie Optoelectronics Research

More information

Single-mode lasing in PT-symmetric microring resonators

Single-mode lasing in PT-symmetric microring resonators CREOL The College of Optics & Photonics Single-mode lasing in PT-symmetric microring resonators Matthias Heinrich 1, Hossein Hodaei 2, Mohammad-Ali Miri 2, Demetrios N. Christodoulides 2 & Mercedeh Khajavikhan

More information

Multi-mode to single-mode conversion in a 61 port photonic lantern

Multi-mode to single-mode conversion in a 61 port photonic lantern Downloaded from orbit.dtu.dk on: Sep 13, 2018 Multi-mode to single-mode conversion in a 61 port photonic lantern Noordegraaf, Danny; Skovgaard, Peter M.W.; Maack, Martin D.; Bland-Hawthorn, Joss; Lægsgaard,

More information

A Low-loss Integrated Beam Combiner based on Polarization Multiplexing

A Low-loss Integrated Beam Combiner based on Polarization Multiplexing MITSUBISHI ELECTRIC RESEARCH LABORATORIES http://www.merl.com A Low-loss Integrated Beam Combiner based on Polarization Multiplexing Wang, B.; Kojima, K.; Koike-Akino, T.; Parsons, K.; Nishikawa, S.; Yagyu,

More information

Suppression of Four Wave Mixing Based on the Pairing Combinations of Differently Linear-Polarized Optical Signals in WDM System

Suppression of Four Wave Mixing Based on the Pairing Combinations of Differently Linear-Polarized Optical Signals in WDM System The Quarterly Journal of Optoelectronical Nanostructures Islamic Azad University Spring 2016 / Vol. 1, No.1 Suppression of Four Wave Mixing Based on the Pairing Combinations of Differently Linear-Polarized

More information

High-Speed Optical Modulators and Photonic Sideband Management

High-Speed Optical Modulators and Photonic Sideband Management 114 High-Speed Optical Modulators and Photonic Sideband Management Tetsuya Kawanishi National Institute of Information and Communications Technology 4-2-1 Nukui-Kita, Koganei, Tokyo, Japan Tel: 81-42-327-7490;

More information

Fabrication and Comprehensive Modeling of Ion- Exchanged Bragg Opitcal Add-Drop Multiplexers

Fabrication and Comprehensive Modeling of Ion- Exchanged Bragg Opitcal Add-Drop Multiplexers Wilfrid Laurier University Scholars Commons @ Laurier Physics and Computer Science Faculty Publications Physics and Computer Science 2004 Fabrication and Comprehensive Modeling of Ion- Exchanged Bragg

More information

Optical fiber-fault surveillance for passive optical networks in S-band operation window

Optical fiber-fault surveillance for passive optical networks in S-band operation window Optical fiber-fault surveillance for passive optical networks in S-band operation window Chien-Hung Yeh 1 and Sien Chi 2,3 1 Transmission System Department, Computer and Communications Research Laboratories,

More information

PLC-based LP11 mode rotator for mode-division multip. modifications of the content of this paper are prohi. Instructions for use

PLC-based LP11 mode rotator for mode-division multip. modifications of the content of this paper are prohi. Instructions for use Title PLC-based LP11 mode rotator for mode-division multip Saitoh, Kunimasa; Uematsu, Takui; Hanzawa, Nobutomo; Author(s) Takashi; Tsujikawa, Kyozo; Yamamoto, Fumihiko CitationOptics Express, 22(16): 19117-19130

More information

Optical Wavelength Interleaving

Optical Wavelength Interleaving Advances in Wireless and Mobile Communications. ISSN 0973-6972 Volume 10, Number 3 (2017), pp. 511-517 Research India Publications http://www.ripublication.com Optical Wavelength Interleaving Shivinder

More information

RECENTLY, studies have begun that are designed to meet

RECENTLY, studies have begun that are designed to meet 838 IEEE JOURNAL OF QUANTUM ELECTRONICS, VOL. 43, NO. 9, SEPTEMBER 2007 Design of a Fiber Bragg Grating External Cavity Diode Laser to Realize Mode-Hop Isolation Toshiya Sato Abstract Recently, a unique

More information

Design and fabrication of an asymmetric twin-core fiber directional coupler for gain-flattened EDFA

Design and fabrication of an asymmetric twin-core fiber directional coupler for gain-flattened EDFA Design and fabrication of an asymmetric twin-core fiber directional coupler for gain-flattened EDFA B. Nagaraju, Michèle Ude, Stanislaw Trzesien, Bernard Dussardier, Ravi K. Varshney, Gérard Monnom, Wilfried

More information

Dynamic gain-tilt compensation using electronic variable optical attenuators and a thin film filter spectral tilt monitor

Dynamic gain-tilt compensation using electronic variable optical attenuators and a thin film filter spectral tilt monitor Dynamic gain-tilt compensation using electronic variable optical attenuators and a thin film filter spectral tilt monitor P. S. Chan, C. Y. Chow, and H. K. Tsang Department of Electronic Engineering, The

More information

OPTICAL CIRCULATOR FOR FREE SPACE OPTICAL COMMUNICATION

OPTICAL CIRCULATOR FOR FREE SPACE OPTICAL COMMUNICATION Technical Disclosure Commons Defensive Publications Series October 13, 2016 OPTICAL CIRCULATOR FOR FREE SPACE OPTICAL COMMUNICATION Chiachi Wang Follow this and additional works at: http://www.tdcommons.org/dpubs_series

More information