488nm coherent emission by intracavity frequency doubling of extended cavity surface-emitting diode lasers
|
|
- Kelly Perkins
- 5 years ago
- Views:
Transcription
1 Invited Paper 488nm coherent emission by intracavity frequency doubling of extended cavity surface-emitting diode lasers A. V. Shchegrov, D. Lee, J. P. Watson, A. Umbrasas, E. M. Strzelecka, M. K. Liebman, C. A. Amsden, A. Lewis, V. V. Doan, B. D. Moran, J. G. McInerney, A. Mooradian Novalux, Inc., 117 Sonora Court, Sunnyvale, CA 9486, USA ABSTRACT We describe a novel blue-green laser platform, based on the intracavity frequency doubling of Novalux Extended Cavity Surface Emitting Lasers. We have demonstrated 5 to 4mW of single-ended, 488nm, single-longitudinal mode emission with beam quality M 2 <1.2. The optical quality of these lasers matches that of gas lasers; their compactness and efficiency exceed ion, DPSS, and OPSL platforms. These unique properties are designed to serve diverse instrumentation markets such as bio-medical, semiconductor inspection, reprographics, imaging, etc., and to enable new applications. We also present data on the reliability of this novel laser platform and its extensions to different wavelengths (in particular, 46nm and 532nm) and to next-generation, highly compact, monolithic intracavity-doubled lasers. Keywords: blue lasers, visible lasers, diode lasers, frequency doubling, surface-emitting lasers, single mode 1. INTRODUCTION Visible cw lasers in the blue-green frequency range have been attracting increasing interest in recent years due to their applications in many diverse industries: bio-medical instrumentation, semiconductor inspection and alignment, digital imaging and reprographics, optical recording and storage, displays, confocal microscopy, etc. The 488nm wavelength has a special role in these applications. First, many physical phenomena such as laser-induced fluorescence employed in the bio-medical analytical instrument industry have peak efficiency at or near this particular wavelength. Second, 488nm is one of the primary emitting wavelengths of the Argon-ion laser. The high-quality technical characteristics of Argonion lasers include a Gaussian beam, stable power, and stable beam pointing. These propertied offered enough incentive to design the 488nm wavelength and Argon-ion lasers into thousands of instruments and experiments. The standards set by the Argon-ion laser can be summarized briefly as follows 5-15mW of power in the majority of applications, and >15mW in some other cases High beam quality, i.e. TEM spatial profile with M 2 <1.2 Low noise Pointing stability Long-term power stability Low cost. However, the current trends in instrumentation development call for the same or improved technical performance in a more compact, reliable, efficient, and flexible product without any significant cost increase. A more complete set of requirements reflecting these demands would include all of the items summarized above in and the following Low power consumption (high efficiency) Compactness High reliability Narrow spectrum (single emission wavelength) Custom-designed wavelength (in the blue-green range) A laser meeting all the requirements summarized in these two lists would be an ideal fit for existing applications employing 488nm lasers and could enable many new applications. However, no blue-green laser platform could fully satisfy all of these demands until now. Argon-ion lasers, which have dominated the 488nm markets for several decades, Vertical-Cavity Surface-Emitting Lasers VII, Chun Lei, Sean P. Kilcoyne, Editors, Proceedings of SPIE Vol (23) 23 SPIE X/3/$
2 cannot meet these demands because of their very high power consumption (~15W), large size (~12 cu. inches), multiple plasma spectral lines requiring filtering out unwanted wavelengths, and inferior reliability compared to that of diode lasers. A diode laser solution is desirable to meet the compactness, reliability, custom wavelength, and low cost demands. However, no commercially viable semiconductor gain material exists in the blue-green frequency range. Many of the items summarized above have been recently addressed by the introduction of frequency-doubled diodepumped solid state laser (DPSS) [1] and optically-pumped semiconductor laser (OPSL) [2] platforms. In both platforms, a high-power edge-emitting diode laser at the wavelength ~81nm is used to pump a gain medium (solid state in the DPSS platform and semicondutor in the OPSL platform) to generate another infrared wavelength, typically 976 or 164nm. The resulting IR beam is frequency doubled to a visible wavelength (blue or green). These laser platforms were designed to meet beam quality, narrow spectrum, low noise, and other specifications. The OPSL platform also allows designing the wavelength of semiconductor gain material. The power consumption and dimensions were reduced to the levels ~6W and 5 cu. inches, respectively, which are orders of magnitude lower than the numbers for typical Argonion lasers. However, the complexity of DPSS and OPSL platforms, requiring circularization of the 81nm pump beam, managing 3 different wavelengths and 2 pump lasers in a single product, and stabilization of the spectral mode in such a complex structure makes these lasers inherently more costly to build than gas lasers. In this paper, we introduce a new type of cw, 488nm visible laser, called Protera, based on the intracavity frequency doubling of the electrically pumped Novalux Extended Cavity Surface-Emitting Laser (NECSEL ). We believe that this platform addresses both sets of demands listed above, and its simple and efficient design can enable many existing and new applications for high-quality visible lasers. In the following sections we discuss the design and technical performance data for Protera lasers. We also demonstrate the flexibility of this laser platform by producing 46nm and 532nm wavelengths in the same laser design and by rescaling the laser dimensions to smaller or larger levels to meet particular design goals. External mirror n-dbr QWs p-dbr Thermal lens GaAs Substrate w w Cavity mode w BeO sub-mount Figure 1. NECSEL structure. Parameters w 1, w 2, and w describe the beam size at various points in the cavity the chip, the OC, and the waist, respectively. 2. NECSEL PLATFORM The design, performance, and manufacturing of NECSELs are described in other papers published by Novalux [3,4]. Here we briefly summarize some characteristics pertinent to the design of a visible laser by intracavity frequency doubling. The Novalux Extended Cavity Surface-Emitting Laser (NECSEL) is an electrically pumped diode laser that has a three-mirror, coupled cavity design as shown in Fig. 1. The substrate-emitting die includes a top-side GaAs/AlGaAs epitaxial high reflector which is doped p-type when the usual n-type GaAs substrates are used. The critical design parameters for the NECSEL cavity are the gain region diameter, the n-dbr and output coupler (OC) reflectivities, the OC radius of curvature, and the external cavity length. The power can be scaled up (down) by increasing (decreasing) the gain aperture diameter. The balance between n-dbr and OC reflectivities (typically, in the range 6% to 9% for one of these mirrors and 9% to 6% for the other) is worked out to minimize external cavity losses (primarily, in the substrate) and to maximize the beam power and quality. The OC radius of curvature and cavity length are designed to ensure the maximum overlap of the NECSEL eigenmode diameter 2w 1 at the chip with the gain diameter and to ensure best manufacturing tolerances to mechanical misalignment and to thermal lens variations. When designed for a maximum outcoupled TEM power, the NECSEL normally lases in a single longitudinal spectral mode, which is the highest-gain spectral eigenmode of the external cavity. 198 Proc. of SPIE Vol. 4994
3 We believe that the NECSEL platform combines the major advantages of semiconductor lasers and solid-state lasers. Some of the advantages NECSEL shares with the world of semiconductor lasers are High, scalable power levels (we demonstrated up to 1W multimode, and up to.5w TEM operation) High reliability (driven by Telcordia requirements) Custom IR wavelength - with the nominal wavelength of 976nm, we demonstrated equally reliable and efficient NECSEL devices in the range of 92nm to 164nm High efficiency we have consistently demonstrated NECSELs with ~2% wall-plug efficiency in TEM operation High manufacturability surface-emitting geometry allows wafer-level screening Some advantages common with solid-state lasers are Flexible cavity design and ability to control optical performance (mode quality, polarization, frequency, etc.) by introducing intracavity elements High beam quality we have measured beam quality M 2 <1.1 when diode current was varied from lasing power threshold to rollover Narrow spectral line controlled by the coupled-cavity design Needless to say, the full utilization of these advantages requires performing the sophisticated optimization task of optical, electrical, semiconductor, mechanical, and thermal designs of the NECSEL. This has been done by the multidisciplinary team of Novalux engineers and scientists as described in Refs.3 and 4. The set of NECSEL design features we have just summarized makes this platform well suited for intracavity frequency doubling to visible wavelengths. We will address the design optimization and trade-offs for visible light generation in the next section. 3. INTRACAVITY FREQUENCY-DOUBLING OF NECSEL: 488nm PROTERA LASER To achieve high nonlinear conversion and obtain a high-spatial-quality, stable optical beam via the second harmonic generation process with power levels on the order of ~1mW, it is necessary to satisfy several requirements for the fundamental beam [5,6]: high (intracavity) power, ~Watts narrow spectral line - typically, under.1nm high-quality TEM beam, M2<1.2 Conventional edge-emitting diode lasers can provide high power but lack narrow spectral linewidth and spatial beam quality. For this reason, one has to design a 2-step conversion process used in DPSS and OPSL platforms, e.g. conversion from 81nm to 976nm and from 976nm to 488nm in the OPSL platform. Another type of diode laser, the vertical-cavity surface-emitting lasers (VCSELs), are capable of producing high-quality, circular Gaussian beams but they do not reach power levels beyond a few milliwatts. The surface-emitting laser with an external cavity (NECSEL) can meet all three demands and use the space provided by the external cavity for a nonlinear crystal. Compared to the high-power 976nm NECSEL, we have to take several extra steps in the design of a frequency-doubled laser. The partially reflective output mirror maximizing the outcoupled IR power is replaced by a mirror with high reflectivity at 976nm and high transmission at 488nm. This allows us to maximize the circulating power at the fundamental wavelength and to minimize losses in the generated 488nm beam. Since the nonlinear frequency-doubling process is always polarization sensitive, we have to lock the polarization in the fundamental IR beam. Depending on the required discrimination level between the two polarizations, we can lock polarization either on the chip level (using techniques such as those employed with VCSELs [7]), or in the external cavity (e.g., with a Brewster plate). Another critical step is to design the wavelength stabilization mechanism. Using a high-reflectivity mirror at 976nm can allow lasing in more than one longitudinal mode. Regardless of the phase-matching spectral bandwidth of the selected nonlinear material, unstable longitudinal mode operation (mode hopping) will result in a noisy, unstable output, similar to the noisy mode hopping regime of DPSS green lasers [8]. Therefore, we made it a critical requirement to design Protera as a single-longitudinal mode laser. Figure 2 illustrates how this can be achieved. First, some wavelength stabilization is already provided by the coupled-cavity design (Fig.1). This is shown in Fig.2 which illustrates the spectral (longitudinal) eigenmodes of the compound NECSEL cavity. The external cavity defines the spacing of modes shown in the solid line while the internal cavity provides modulation shown in dotted line. By changing the parameters Proc. of SPIE Vol
4 of both cavities, one can achieve a regime when only a single longitudinal cavity mode can lase. Alternatively, one can again use the space in the external cavity to insert another optical filter (with transmission curve illustrated by the dashed line in Fig.2) to lock a single longitudinal mode NECSEL Longitudinal Modes.1 Short (internal) Cavity Eigenmode Intracavity Filter Transmission Wavelength, nm Figure 2. Illustration of the longitudinal mode spectrum in the composite NECSEL cavity and the wavelength stabilization mechanism Next, we optimize the nonlinear conversion process. A number of nonlinear materials, including periodically-poled materials such as PPLN, PPLT, and single-crystal materials such as KNbO 3 and LBO, are available for conversion from 976nm to 488nm. Most of these materials have been evaluated at Novalux and found to be usable for obtaining 5-4mW of 488nm blue light. Matching our theoretical design with experimental data, we found that the range of fundamental beam waist diameters (2w in Fig.1) of 5 m to 2 m has to be described by the theories developed for the nonlinear conversion of Gaussian beams [5,6] and not simplified plane-wave models with the well-known sinc 2 dependence of the second-harmonic power on the phase mismatch. In general, the power in the second-harmonic beam can be expressed in terms of the power P in the fundamental beam, the material-dependent nonlinear coefficient w P 2 K and a function of the fundamental beam waist radius, waist position in the crystal, walk-off angle (in the case of non-critical phase matching), and the crystal length L : 2 P (, 2 P K F w f,, L) The function F has to be computed numerically and has different forms for type-i and type-ii phase matching. This model proves to be consistent with experiment and helps us select the nonlinear crystal, its length, the fundamental beam size, power, and to optimize the second harmonic power and mechanical and temperature tolerances. After we have defined the design space for all the critical parameters (IR power, cavity stability and tolerances, nonlinear conversion, wavelength stabilization, polarization stabilization), we have to look at them as a whole and make necessary adjustments to ensure that they can co-exist in a real laser. For example, a nonlinear conversion optimization step can call for a smallest possible waist diameter, which is difficult to achieve in a real cavity. The approach we use is to start with a set of specifications e.g. we are currently targeting two separate power specifications of 5mW and 15mW, and to design the laser around these specifications. The result is shown in Fig.3, illustrating the look of both 5mW and 15mW Protera lasers. Both 5mW and 15mW Proteras share the same small package size ~2 cu. inches, and typically consume ~5W of power. f 2 Proc. of SPIE Vol. 4994
5 Figure 3. Protera laser shown without a housing cover. The block on the right side in the housing is the laser cavity, the block on the left side is the collimation optics, IR filter, and photodetector. The screw holes on the plate under the housing are separated by 1 inch and illustrate the scale of the picture. 4. TECHNICAL CHARACTERISTICS AND RELIABILITY OF 488nm PROTERA We have measured spectra of multiple Protera units. A typical result is shown in Fig.4, illustrating the spectral purity of Protera with side mode suppression of 4dB. The linewidth is below the resolution of.1nm of the optical spectrum analyzers we used. Like in all diode lasers, the Protera power output can be controlled by changing the drive current. Figure 5 illustrates a light-power (LI) curve of a 488nm Protera. This type of behavior allows us to control the stable power output by adjusting the drive current along the slope of the LI curve. Another advantage one can utilize in this platform is highspeed current modulation, not available in traditional 488nm Argon-ion platforms. We also make certain that the laser operates in the same stable, single-longitudinal mode over a range of ambient temperatures, and that it returns to the same power and wavelength after several turn off / turn on cycles simulating the laser operation in a real instrument. Figure 6 shows the performance of a 5mW Protera laser on a hot plate. The power level is stabilized by means of a conventional feedback loop using the integrated photodetector and modulating the diode current. In the first two time intervals ~2.2hrs each the plate is temperature cycled in the range of 2 o C to 45 o C, and in the third interval (only the first 6hrs of which are shown) the laser is operating at a normal room temperature. Two turnoff / turn-on tests are performed in the time interval shown. The hot plate temperature in non-operating windows was changed from 45 o C to 65 o C and back to 45 o C. The total power modulation in the operating windows is under 1% and the laser stays in the same single longitudinal mode, resulting in an extremely low intensity noise shown on the right axis, exceeding our specification of <.2% by orders of magnitude. As can be seen from Fig.6, the laser is stable with respect to temperature cycling, turn-on / turn-off tests, and normal operation. Proc. of SPIE Vol
6 1.E+ 1.E-1 Optical Spectrum [db] 1.E-2 1.E-3 1.E-4 1.E-5 1.E-6 ~ 4 db 1.E-7 1.E Wavelength [nm] Figure 4. Spectrum of a 5mW Protera laser. 9 Blue laser output power (mw) Drive Current (ma) Figure 5. Light-current (LI) curve of a 488nm Protera. 22 Proc. of SPIE Vol. 4994
7 turned off turned off.2 Normalized Power Power (6mW) Noise Noise, % (per cent) Time (hours) Figure 6. Power and noise of a 488nm Protera laser on a hot plate. The plate temperature in first two windows of operation is cycled 2 o C to 45 o C, in the third window of operation it is not controlled (normal room temperature). A similar temperature-cycling setup was used to analyze the far-field pointing stability of 5mW and 15mW Proteras. The data we collected to date shows pointing changes under 5 rad per 1 o C temperature change with the beam pointing returning to the original point after the temperature returned to its original point. This exceeded the performance of the Argon-ion laser we tested. The beam quality tests are performed with an M 2 meter and have consistently showed M 2 <1.2. As mentioned in the previous sections, the key element in obtaining the high-quality 488nm beam is a high-quality fundamental, 976nm beam, which is controlled by the external cavity of the NECSEL. The reliability of NECSEL die, driven by the stringent Telcordia qualification, exceeds the requirements in the visible laser market by at least an order of magnitude. The interested reader is referred to Ref.4 for a more complete summary of accelerated life tests on the NECSEL die. A more challenging task is to define meaningful accelerated life tests for nonlinear materials and fully assembled lasers. The approach we are taking now is performing the life test on a population of Protera lasers, simulating their normal operating conditions, with a goal of achieving 2k failure-free hours per device. To date, we have accumulated >25k hours on the entire population with the oldest device running for over 5k hours without degradation. Other tests helping us to understand possible failure modes of Proteras within and beyond the specified range of operating conditions include temperature cycling, damp heat, shock and vibration, etc. 5. NECSEL PLATFORM FOR VISIBLE LASERS: BEYOND 488nm PROTERA In Ref.4 we describe the capabilities of the NECSEL platform in the near-infrared wavelength range. Here we briefly discuss the advantages of the frequency-doubled NECSEL platform in the visible wavelength range. By adjusting the composition of the semiconductor gain material, we have demonstrated efficient and reliable NECSEL devices at wavelengths from 92nm to 164nm. These dies were frequency doubled in the Protera configuration, with a Proc. of SPIE Vol
8 5mW single-longitudinal, single-transverse mode output at 46nm and 532nm, respectively. These two wavelengths, like 488nm, are commonly used in many applications of visible lasers. Other wavelengths can also be realized using the same architecture and die material system. Another demonstration of NECSEL capabilities is a highly compact, monolithic version of a frequency-doubled laser with the entire external cavity filled with a nonlinear material. Figure 7 shows the first laboratory demonstration built at Novalux. The 488nm beam has the spatial quality factor M 2 <1.5 and 2.3mW of power. These early units show the significant promise of the NECSEL platform for a variety of visible laser applications with the laser designed for a particular set of requirements such as power, compactness, cost, etc. Figure 7. A compact, monolithic, frequency-doubled NECSEL producing 2.3mW of blue light at 488nm 6. CONCLUSIONS In conclusion, we have demonstrated a novel 488nm laser, based on the intracavity frequency doubling of a diode surface-emitting laser (NECSEL). The optical performance of Protera (beam quality, low noise, and pointing stability) matches or exceeds the characteristics of Argon-ion lasers and blue-green DPSS and OPSL lasers. The direct frequency doubling of a diode laser allows simple design which results in the combination of low cost, small size, high reliability, and efficiency that cannot be achieved with other laser platforms. The key design features of the Protera laser are its external cavity that controls a high-quality transverse mode that is used for frequency doubling, and its singlelongitudinal mode design that provides low-noise, high stability operation. We also demonstrated the flexibility and future outlook of the NECSEL/Protera platform for visible lasers by desingning and building 46nm and 532nm lasers and a highly compact, monolithic version of a frequency-doubled NECSEL with the external cavity filled with a nonlinear material. It is our belief that visible lasers based on frequency doubling of NECSEL will serve a variety of existing and new applications requiring high-quality visible lasers in the blue-green wavelength range. 24 Proc. of SPIE Vol. 4994
9 ACKNOWLEDGEMENTS The authors would like to thank G. Carey, W. Ha, J. Harrington, S. Venkatkrishnan, B. Cantos, and W. Hitchens for their outstanding work on Protera and NECSEL engineering, and also K. Kennedy, R. Martinsen, D. Heald, R. Lujan, and H. Zhou for their contributions at earlier stages of NECSEL development. Many thanks are also due to W. Krupke, R. Waltonsmith, J. Cannon, and I. Jenks for the important role they played in bringing the NECSEL platform into the visible laser markets. REFERENCES 1. W. Krupke, Advanced diode-pumped solid state lasers (DPSSLs): near-term trends and future prospects, Proc. SPIE, vol.3888, p.21 (2). 2. J. L. A. Chilla, A. Caprara, E. Mao, L. Spinelli, W. Seelert, J. Rosperich, and A. Salokatve, Solid-state blue laser technology, IEEE Digest of LEOS Summer Topical Meeting 21, IEEE, p.2 (21). 3. A. Mooradian, High brightness, cavity-controlled, electrically pumped surface emitting GaInAs lasers operating at 98nm, Proc. Int. Conf on Opt. Fiber Commun. (OFC), postdeadline paper (21). 4. J. G. McInerney, A. Mooradian, A. Lewis, A. V. Shchegrov, E. M. Strzelecka, D. Lee, J. P. Watson, K. W. Kennedy, G. P. Carey, H. Zhou, B. D. Cantos, W. R. Hitchens, V. Doan, Novel 98nm light sources using vertical cavity lasers with extended optical cavities, Proc. SPIE, this volume (23). 5. G. D. Boyd and D. A. Kleinman, Parametric interaction of focused gaussian beams, J. Appl. Phys., vol. 39, p.3597 (1968) 6. J.-J. Zondy, Comparative theory of walkoff-limited type-ii vs type-i second harmonic generation with gaussian beams, Opt. Commun., vol.81, p. 427 (1991). 7. T. Yoshikawa, T. Kawakami, H. Saito, H. Kosaka, M. Kajita, K. Kurihara, Y. Sugimoto, and K. Kasahara, Polarization-controlled single-mode VCSELs, IEEE J. of Quant. Electr., vol. 34, p. 19 (1998). 8. D. W. Anthon, D. L. Sipes, T. J. Pier, and M. R. Ressl, Intracavity doubling of cw diode-pumped Nd:YAG lasers with KTP, IEEE J. of Quant. Electr., vol.28, p.1148 (1992). Proc. of SPIE Vol
532nm laser sources based on intracavity frequency doubling of extended cavity surface-emitting diode lasers
532nm laser sources based on intracavity frequency doubling of extended cavity surface-emitting diode lasers A. V. Shchegrov, A. Umbrasas, J. P. Watson, D. Lee, C. A. Amsden, W. Ha, G. P. Carey, V. V.
More informationVertical External Cavity Surface Emitting Laser
Chapter 4 Optical-pumped Vertical External Cavity Surface Emitting Laser The booming laser techniques named VECSEL combine the flexibility of semiconductor band structure and advantages of solid-state
More information3550 Aberdeen Ave SE, Kirtland AFB, NM 87117, USA ABSTRACT 1. INTRODUCTION
Beam Combination of Multiple Vertical External Cavity Surface Emitting Lasers via Volume Bragg Gratings Chunte A. Lu* a, William P. Roach a, Genesh Balakrishnan b, Alexander R. Albrecht b, Jerome V. Moloney
More informationSingle Frequency DPSS Lasers
Single Frequency DPSS Lasers Any wavelength from NIR to UV using a single engineering platform based on our proprietary patented BRaMMS DPSS Laser technology. We develop and produce Single Frequency DPSS
More informationQuantum-Well Semiconductor Saturable Absorber Mirror
Chapter 3 Quantum-Well Semiconductor Saturable Absorber Mirror The shallow modulation depth of quantum-dot saturable absorber is unfavorable to increasing pulse energy and peak power of Q-switched laser.
More informationA Coherent White Paper May 15, 2018
OPSL Advantages White Paper #3 Low Noise - No Mode Noise 1. Wavelength flexibility 2. Invariant beam properties 3. No mode noise ( green noise ) 4. Superior reliability - huge installed base The optically
More informationFeedback-Dependent Threshold of Electrically Pumped VECSELs
Feedback in Electrically Pumped VECSELs 37 Feedback-Dependent Threshold of Electrically Pumped VECSELs Wolfgang Schwarz We present the investigation of the feedback-dependent threshold of an 8 nm wavelength
More informationSpatial Investigation of Transverse Mode Turn-On Dynamics in VCSELs
Spatial Investigation of Transverse Mode Turn-On Dynamics in VCSELs Safwat W.Z. Mahmoud Data transmission experiments with single-mode as well as multimode 85 nm VCSELs are carried out from a near-field
More informationMonolithically-integrated long vertical cavity surface emitting laser incorporating a concave micromirror on a glass substrate
Monolithically-integrated long vertical cavity surface emitting laser incorporating a concave micromirror on a glass substrate Rafael I. Aldaz, Michael W. Wiemer, David A.B. Miller, and James S. Harris
More informationHigh power VCSEL array pumped Q-switched Nd:YAG lasers
High power array pumped Q-switched Nd:YAG lasers Yihan Xiong, Robert Van Leeuwen, Laurence S. Watkins, Jean-Francois Seurin, Guoyang Xu, Alexander Miglo, Qing Wang, and Chuni Ghosh Princeton Optronics,
More informationRing cavity tunable fiber laser with external transversely chirped Bragg grating
Ring cavity tunable fiber laser with external transversely chirped Bragg grating A. Ryasnyanskiy, V. Smirnov, L. Glebova, O. Mokhun, E. Rotari, A. Glebov and L. Glebov 2 OptiGrate, 562 South Econ Circle,
More informationIntroduction Fundamentals of laser Types of lasers Semiconductor lasers
ECE 5368 Introduction Fundamentals of laser Types of lasers Semiconductor lasers Introduction Fundamentals of laser Types of lasers Semiconductor lasers How many types of lasers? Many many depending on
More informationDEVELOPMENT OF CW AND Q-SWITCHED DIODE PUMPED ND: YVO 4 LASER
DEVELOPMENT OF CW AND Q-SWITCHED DIODE PUMPED ND: YVO 4 LASER Gagan Thakkar 1, Vatsal Rustagi 2 1 Applied Physics, 2 Production and Industrial Engineering, Delhi Technological University, New Delhi (India)
More informationMode analysis of Oxide-Confined VCSELs using near-far field approaches
Annual report 998, Dept. of Optoelectronics, University of Ulm Mode analysis of Oxide-Confined VCSELs using near-far field approaches Safwat William Zaki Mahmoud We analyze the transverse mode structure
More informationResearch on the mechanism of high power solid laser Wenkai Huang, Yu Wu
International Conference on Automation, Mechanical Control and Computational Engineering (AMCCE 015) Research on the mechanism of high power solid laser Wenkai Huang, Yu Wu Lab center, Guangzhou University,
More informationMASSACHUSETTS INSTITUTE OF TECHNOLOGY Department of Electrical Engineering and Computer Science
Student Name Date MASSACHUSETTS INSTITUTE OF TECHNOLOGY Department of Electrical Engineering and Computer Science 6.161 Modern Optics Project Laboratory Laboratory Exercise No. 6 Fall 2010 Solid-State
More informationA 243mJ, Eye-Safe, Injection-Seeded, KTA Ring- Cavity Optical Parametric Oscillator
Utah State University DigitalCommons@USU Space Dynamics Lab Publications Space Dynamics Lab 1-1-2011 A 243mJ, Eye-Safe, Injection-Seeded, KTA Ring- Cavity Optical Parametric Oscillator Robert J. Foltynowicz
More information101 W of average green beam from diode-side-pumped Nd:YAG/LBO-based system in a relay imaged cavity
PRAMANA c Indian Academy of Sciences Vol. 75, No. 5 journal of November 2010 physics pp. 935 940 101 W of average green beam from diode-side-pumped Nd:YAG/LBO-based system in a relay imaged cavity S K
More informationVixar High Power Array Technology
Vixar High Power Array Technology I. Introduction VCSELs arrays emitting power ranging from 50mW to 10W have emerged as an important technology for applications within the consumer, industrial, automotive
More informationWavelength Stabilization of HPDL Array Fast-Axis Collimation Optic with integrated VHG
Wavelength Stabilization of HPDL Array Fast-Axis Collimation Optic with integrated VHG C. Schnitzler a, S. Hambuecker a, O. Ruebenach a, V. Sinhoff a, G. Steckman b, L. West b, C. Wessling c, D. Hoffmann
More informationLOPUT Laser: A novel concept to realize single longitudinal mode laser
PRAMANA c Indian Academy of Sciences Vol. 82, No. 2 journal of February 2014 physics pp. 185 190 LOPUT Laser: A novel concept to realize single longitudinal mode laser JGEORGE, KSBINDRAand SMOAK Solid
More information2.34 μm electrically-pumped VECSEL with buried tunnel junction
2.34 μm electrically-pumped VECSEL with buried tunnel junction Antti Härkönen* a, Alexander Bachmann b, Shamsul Arafin b, Kimmo Haring a, Jukka Viheriälä a, Mircea Guina a, and Markus-Christian Amann b
More informationA 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 informationOptically-Pumped Semicoductor Disk Lasers with Intracavity Second-Harmonic Generation
Semiconductor Disk Lasers with Intracavity Second-Harmonic Generation 91 Optically-Pumped Semicoductor Disk Lasers with Intracavity Second-Harmonic Generation Frank Demaria and Alexander Kern In this contribution,
More informationHigh Average Power, High Repetition Rate Side-Pumped Nd:YVO 4 Slab Laser
High Average Power, High Repetition Rate Side-Pumped Nd:YVO Slab Laser Kevin J. Snell and Dicky Lee Q-Peak Incorporated 135 South Rd., Bedford, MA 173 (71) 75-9535 FAX (71) 75-97 e-mail: ksnell@qpeak.com,
More informationStable 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 informationG. Norris* & G. McConnell
Relaxed damage threshold intensity conditions and nonlinear increase in the conversion efficiency of an optical parametric oscillator using a bi-directional pump geometry G. Norris* & G. McConnell Centre
More informationLaser Diode. Photonic Network By Dr. M H Zaidi
Laser Diode Light emitters are a key element in any fiber optic system. This component converts the electrical signal into a corresponding light signal that can be injected into the fiber. The light emitter
More informationHigh brightness semiconductor lasers M.L. Osowski, W. Hu, R.M. Lammert, T. Liu, Y. Ma, S.W. Oh, C. Panja, P.T. Rudy, T. Stakelon and J.E.
QPC Lasers, Inc. 2007 SPIE Photonics West Paper: Mon Jan 22, 2007, 1:20 pm, LASE Conference 6456, Session 3 High brightness semiconductor lasers M.L. Osowski, W. Hu, R.M. Lammert, T. Liu, Y. Ma, S.W. Oh,
More informationContinuous-Wave Characteristics of MEMS Atomic Clock VCSELs
CW Characteristics of MEMS Atomic Clock VCSELs 4 Continuous-Wave Characteristics of MEMS Atomic Clock VCSELs Ahmed Al-Samaneh and Dietmar Wahl Vertical-cavity surface-emitting lasers (VCSELs) emitting
More informationWavelength Control and Locking with Sub-MHz Precision
Wavelength Control and Locking with Sub-MHz Precision A PZT actuator on one of the resonator mirrors enables the Verdi output wavelength to be rapidly tuned over a range of several GHz or tightly locked
More informationOptical generation of frequency stable mm-wave radiation using diode laser pumped Nd:YAG lasers
Optical generation of frequency stable mm-wave radiation using diode laser pumped Nd:YAG lasers T. Day and R. A. Marsland New Focus Inc. 340 Pioneer Way Mountain View CA 94041 (415) 961-2108 R. L. Byer
More informationTHE TUNABLE LASER LIGHT SOURCE C-WAVE. HÜBNER Photonics Coherence Matters.
THE TUNABLE LASER LIGHT SOURCE HÜBNER Photonics Coherence Matters. FLEXIBILITY WITH PRECISION is the tunable laser light source for continuous-wave (cw) emission in the visible and near-infrared wavelength
More informationElimination of Self-Pulsations in Dual-Clad, Ytterbium-Doped Fiber Lasers
Elimination of Self-Pulsations in Dual-Clad, Ytterbium-Doped Fiber Lasers 1.0 Modulation depth 0.8 0.6 0.4 0.2 0.0 Laser 3 Laser 2 Laser 4 2 3 4 5 6 7 8 Absorbed pump power (W) Laser 1 W. Guan and J. R.
More informationR. J. Jones Optical Sciences OPTI 511L Fall 2017
R. J. Jones Optical Sciences OPTI 511L Fall 2017 Semiconductor Lasers (2 weeks) Semiconductor (diode) lasers are by far the most widely used lasers today. Their small size and properties of the light output
More informationSolid-state 488-nm laser based on external-cavity frequency doubling of a multi-longitudinal mode semiconductor laser
Solid-state 488-nm laser based on external-cavity frequency doubling of a multi-longitudinal mode semiconductor laser Vincent Issier a, Boris Kharlamov *a, Thomas Kraft a, Andy Miller a, David Simons a,
More informationChapter 1 Introduction
Chapter 1 Introduction 1-1 Preface Telecommunication lasers have evolved substantially since the introduction of the early AlGaAs-based semiconductor lasers in the late 1970s suitable for transmitting
More information1. INTRODUCTION 2. LASER ABSTRACT
Compact solid-state laser to generate 5 mj at 532 nm Bhabana Pati*, James Burgess, Michael Rayno and Kenneth Stebbins Q-Peak, Inc., 135 South Road, Bedford, Massachusetts 01730 ABSTRACT A compact and simple
More informationKilowatt Class High-Power CW Yb:YAG Cryogenic Laser
Kilowatt Class High-Power CW Yb:YAG Cryogenic Laser D.C. Brown, J.M. Singley, E. Yager, K. Kowalewski, J. Guelzow, and J. W. Kuper Snake Creek Lasers, LLC, Hallstead, PA 18822 ABSTRACT We discuss progress
More informationBasic concepts. Optical Sources (b) Optical Sources (a) Requirements for light sources (b) Requirements for light sources (a)
Optical Sources (a) Optical Sources (b) The main light sources used with fibre optic systems are: Light-emitting diodes (LEDs) Semiconductor lasers (diode lasers) Fibre laser and other compact solid-state
More informationVertical Cavity Surface Emitting Laser (VCSEL) Technology
Vertical Cavity Surface Emitting Laser (VCSEL) Technology Gary W. Weasel, Jr. (gww44@msstate.edu) ECE 6853, Section 01 Dr. Raymond Winton Abstract Vertical Cavity Surface Emitting Laser technology, typically
More information21.2% Wall-plug efficiency green laser based on an electrically pumped VECSEL through intracavity second harmonic generation
21.2% Wall-plug efficiency green laser based on an electrically pumped VECSEL through intracavity second harmonic generation Pu Zhao, Bing Xu, Robert van Leeuwen, Tong Chen, Laurence Watkins, Delai Zhou,
More informationHigh-Power, Passively Q-switched Microlaser - Power Amplifier System
High-Power, Passively Q-switched Microlaser - Power Amplifier System Yelena Isyanova Q-Peak, Inc.,135 South Road, Bedford, MA 01730 isyanova@qpeak.com Jeff G. Manni JGM Associates, 6 New England Executive
More informationPh 77 ADVANCED PHYSICS LABORATORY ATOMIC AND OPTICAL PHYSICS
Ph 77 ADVANCED PHYSICS LABORATORY ATOMIC AND OPTICAL PHYSICS Diode Laser Characteristics I. BACKGROUND Beginning in the mid 1960 s, before the development of semiconductor diode lasers, physicists mostly
More informationTapered Amplifiers. For Amplification of Seed Sources or for External Cavity Laser Setups. 750 nm to 1070 nm COHERENT.COM DILAS.
Tapered Amplifiers For Amplification of Seed Sources or for External Cavity Laser Setups 750 nm to 1070 nm COHERENT.COM DILAS.COM Welcome DILAS Semiconductor is now part of Coherent Inc. With operations
More informationLecture 6 Fiber Optical Communication Lecture 6, Slide 1
Lecture 6 Optical transmitters Photon processes in light matter interaction Lasers Lasing conditions The rate equations CW operation Modulation response Noise Light emitting diodes (LED) Power Modulation
More informationLow Noise High Power Ultra-Stable Diode Pumped Er-Yb Phosphate Glass Laser
Low Noise High Power Ultra-Stable Diode Pumped Er-Yb Phosphate Glass Laser R. van Leeuwen, B. Xu, L. S. Watkins, Q. Wang, and C. Ghosh Princeton Optronics, Inc., 1 Electronics Drive, Mercerville, NJ 8619
More informationMulti-Wavelength, µm Tunable, Tandem OPO
Multi-Wavelength, 1.5-10-µm Tunable, Tandem OPO Yelena Isyanova, Alex Dergachev, David Welford, and Peter F. Moulton Q-Peak, Inc.,135 South Road, Bedford, MA 01730 isyanova@qpeak.com Introduction Abstract:
More information880 Quantum Electronics Optional Lab Construct A Pulsed Dye Laser
880 Quantum Electronics Optional Lab Construct A Pulsed Dye Laser The goal of this lab is to give you experience aligning a laser and getting it to lase more-or-less from scratch. There is no write-up
More informationAn Optical Characteristic Testing System for the Infrared Fiber in a Transmission Bandwidth 9-11μm
An Optical Characteristic Testing System for the Infrared Fiber in a Transmission Bandwidth 9-11μm Ma Yangwu *, Liang Di ** Center for Optical and Electromagnetic Research, State Key Lab of Modern Optical
More informationHybrid vertical-cavity laser integration on silicon
Invited Paper Hybrid vertical-cavity laser integration on Emanuel P. Haglund* a, Sulakshna Kumari b,c, Johan S. Gustavsson a, Erik Haglund a, Gunther Roelkens b,c, Roel G. Baets b,c, and Anders Larsson
More informationVCSELs With Enhanced Single-Mode Power and Stabilized Polarization for Oxygen Sensing
VCSELs With Enhanced Single-Mode Power and Stabilized Polarization for Oxygen Sensing Fernando Rinaldi and Johannes Michael Ostermann Vertical-cavity surface-emitting lasers (VCSELs) with single-mode,
More informationMidterm #1 Prep. Revision: 2018/01/20. Professor M. Csele, Niagara College
Midterm #1 Prep Revision: 2018/01/20 Professor M. Csele, Niagara College Portions of this presentation are Copyright John Wiley & Sons, 2004 Review Material Safety Finding MPE for a laser Calculating OD
More informationSolid-State Laser Engineering
Walter Koechner Solid-State Laser Engineering Fourth Extensively Revised and Updated Edition With 449 Figures Springer Contents 1. Introduction 1 1.1 Optical Amplification 1 1.2 Interaction of Radiation
More informationGeneration of 11.5 W coherent red-light by intra-cavity frequency-doubling of a side-pumped Nd:YAG laser in a 4-cm LBO
Optics Communications 241 (2004) 167 172 www.elsevier.com/locate/optcom Generation of 11.5 W coherent red-light by intra-cavity frequency-doubling of a side-pumped Nd:YAG laser in a 4-cm LBO Zhipei Sun
More informationEye safe solid state lasers for remote sensing and coherent laser radar
Eye safe solid state lasers for remote sensing and coherent laser radar Jesper Munch, Matthew Heintze, Murray Hamilton, Sean Manning, Y. Mao, Damien Mudge and Peter Veitch Department of Physics The University
More informationCHAPTER 5 FINE-TUNING OF AN ECDL WITH AN INTRACAVITY LIQUID CRYSTAL ELEMENT
CHAPTER 5 FINE-TUNING OF AN ECDL WITH AN INTRACAVITY LIQUID CRYSTAL ELEMENT In this chapter, the experimental results for fine-tuning of the laser wavelength with an intracavity liquid crystal element
More informationPolarization Control of VCSELs
Polarization Control of VCSELs Johannes Michael Ostermann and Michael C. Riedl A dielectric surface grating has been used to control the polarization of VCSELs. This grating is etched into the surface
More informationFrequency Noise Reduction of Integrated Laser Source with On-Chip Optical Feedback
MITSUBISHI ELECTRIC RESEARCH LABORATORIES http://www.merl.com Frequency Noise Reduction of Integrated Laser Source with On-Chip Optical Feedback Song, B.; Kojima, K.; Pina, S.; Koike-Akino, T.; Wang, B.;
More informationHigh-power semiconductor lasers for applications requiring GHz linewidth source
High-power semiconductor lasers for applications requiring GHz linewidth source Ivan Divliansky* a, Vadim Smirnov b, George Venus a, Alex Gourevitch a, Leonid Glebov a a CREOL/The College of Optics and
More informationLaser Beam Analysis Using Image Processing
Journal of Computer Science 2 (): 09-3, 2006 ISSN 549-3636 Science Publications, 2006 Laser Beam Analysis Using Image Processing Yas A. Alsultanny Computer Science Department, Amman Arab University for
More informationA Narrow-Band Tunable Diode Laser System with Grating Feedback
A Narrow-Band Tunable Diode Laser System with Grating Feedback S.P. Spirydovich Draft Abstract The description of diode laser was presented. The tuning laser system was built and aligned. The free run
More informationUNMATCHED OUTPUT POWER AND TUNING RANGE
ARGOS MODEL 2400 SF SERIES TUNABLE SINGLE-FREQUENCY MID-INFRARED SPECTROSCOPIC SOURCE UNMATCHED OUTPUT POWER AND TUNING RANGE One of Lockheed Martin s innovative laser solutions, Argos TM Model 2400 is
More informationTrends in Optical Transceivers:
Trends in Optical Transceivers: Light sources for premises networks Peter Ronco Corning Optical Fiber Asst. Product Line Manager Premises Fibers January 24, 2006 Outline: Introduction: Transceivers and
More informationGenesis CX STM-Series
Coherent s unique Optically Pumped Semiconductor Laser (OPSL) technology powers the Genesis CX-STM Series, providing up to 250 mw of UV laser light or up to 10W of visible laser light from either OEM or
More informationFeatures. Applications. Optional Features
Features Compact, Rugged Design TEM Beam with M 2 < 1.2 Pulse Rates from Single Shot to 15 khz IR, Green, UV, and Deep UV Wavelengths Available RS232 Computer Control Patented Harmonic Generation Technology
More informationImportant performance parameters when considering lasers for holographic applications
Important performance parameters when considering lasers for holographic applications E.K. Illy*, H. Karlsson & G. Elgcrona. Cobolt AB, a part of HÜBNER Photonics, Vretenvägen 13, 17154, Stockholm, Sweden.
More information1 kw, 15!J linearly polarized fiber laser operating at 977 nm
1 kw, 15!J linearly polarized fiber laser operating at 977 nm V. Khitrov, D. Machewirth, B. Samson, K. Tankala Nufern, 7 Airport Park Road, East Granby, CT 06026 phone: (860) 408-5000; fax: (860)408-5080;
More informationImproving the output beam quality of multimode laser resonators
Improving the output beam quality of multimode laser resonators Amiel A. Ishaaya, Vardit Eckhouse, Liran Shimshi, Nir Davidson and Asher A. Friesem Department of Physics of Complex Systems, Weizmann Institute
More informationProgress on High Power Single Frequency Fiber Amplifiers at 1mm, 1.5mm and 2mm
Nufern, East Granby, CT, USA Progress on High Power Single Frequency Fiber Amplifiers at 1mm, 1.5mm and 2mm www.nufern.com Examples of Single Frequency Platforms at 1mm and 1.5mm and Applications 2 Back-reflection
More informationQ-switched resonantly diode-pumped Er:YAG laser
Q-switched resonantly diode-pumped Er:YAG laser Igor Kudryashov a) and Alexei Katsnelson Princeton Lightwave Inc., 2555 US Route 130, Cranbury, New Jersey, 08512 ABSTRACT In this work, resonant diode pumping
More informationHIGH POWER LASERS FOR 3 RD GENERATION GRAVITATIONAL WAVE DETECTORS
HIGH POWER LASERS FOR 3 RD GENERATION GRAVITATIONAL WAVE DETECTORS P. Weßels for the LZH high power laser development team Laser Zentrum Hannover, Germany 23.05.2011 OUTLINE Requirements on lasers for
More informationFIBER EVO. Miniaturized laser module complete with controller and USB power supply all within an incredibly small package
Miniaturized laser module complete with controller and USB power supply all within an incredibly small package KEY FEATURES: Incredibly small yet fully featured Output powers up to 75 mw Powered by USB:
More information64 Channel Flip-Chip Mounted Selectively Oxidized GaAs VCSEL Array
64 Channel Flip-Chip Mounted Selectively Oxidized GaAs VCSEL Array 69 64 Channel Flip-Chip Mounted Selectively Oxidized GaAs VCSEL Array Roland Jäger and Christian Jung We have designed and fabricated
More informationImplant Confined 1850nm VCSELs
Implant Confined 1850nm VCSELs Matthew M. Dummer *, Klein Johnson, Mary Hibbs-Brenner, William K. Hogan Vixar, 2950 Xenium Ln. N. Plymouth MN 55441 ABSTRACT Vixar has recently developed VCSELs at 1850nm,
More informationIST IP NOBEL "Next generation Optical network for Broadband European Leadership"
DBR Tunable Lasers A variation of the DFB laser is the distributed Bragg reflector (DBR) laser. It operates in a similar manner except that the grating, instead of being etched into the gain medium, is
More informationActive mode-locking of miniature fiber Fabry-Perot laser (FFPL) in a ring cavity
Active mode-locking of miniature fiber Fabry-Perot laser (FFPL) in a ring cavity Shinji Yamashita (1)(2) and Kevin Hsu (3) (1) Dept. of Frontier Informatics, Graduate School of Frontier Sciences The University
More informationLuminous Equivalent of Radiation
Intensity vs λ Luminous Equivalent of Radiation When the spectral power (p(λ) for GaP-ZnO diode has a peak at 0.69µm) is combined with the eye-sensitivity curve a peak response at 0.65µm is obtained with
More informationOBIS CellX. The Universal Light Engine FEATURES
OBIS CellX The Universal Light Engine OBIS CellX is a multi-wavelength platform for use as the laser excitation Light Engine in applications requiring or laser wavelengths from a single module. CellX delivers
More informationIntegrated High Speed VCSELs for Bi-Directional Optical Interconnects
Integrated High Speed VCSELs for Bi-Directional Optical Interconnects Volodymyr Lysak, Ki Soo Chang, Y ong Tak Lee (GIST, 1, Oryong-dong, Buk-gu, Gwangju 500-712, Korea, T el: +82-62-970-3129, Fax: +82-62-970-3128,
More informationSynchronization in Chaotic Vertical-Cavity Surface-Emitting Semiconductor Lasers
Synchronization in Chaotic Vertical-Cavity Surface-Emitting Semiconductor Lasers Natsuki Fujiwara and Junji Ohtsubo Faculty of Engineering, Shizuoka University, 3-5-1 Johoku, Hamamatsu, 432-8561 Japan
More informationEfficient second-harmonic generation of CW radiation in an external optical cavity using non-linear crystal BIBO
fficient second-harmonic generation of CW radiation in an external optical cavity using non-linear crystal BIBO Sergey KOBTSV*, Alexander ZAVYALOV Novosibirsk State University, Laser Systems Laboratory,
More informationTera-Hz Radiation Source by Deference Frequency Generation (DFG) and TPO with All Solid State Lasers
Tera-Hz Radiation Source by Deference Frequency Generation (DFG) and TPO with All Solid State Lasers Jianquan Yao 1, Xu Degang 2, Sun Bo 3 and Liu Huan 4 1 Institute of Laser & Opto-electronics, 2 College
More informationSelf-organizing laser diode cavities with photorefractive nonlinear crystals
Institut d'optique http://www.iota.u-psud.fr/~roosen/ Self-organizing laser diode cavities with photorefractive nonlinear crystals Nicolas Dubreuil, Gilles Pauliat, Gérald Roosen Nicolas Huot, Laurent
More informationUltra-stable flashlamp-pumped laser *
SLAC-PUB-10290 September 2002 Ultra-stable flashlamp-pumped laser * A. Brachmann, J. Clendenin, T.Galetto, T. Maruyama, J.Sodja, J. Turner, M. Woods Stanford Linear Accelerator Center, 2575 Sand Hill Rd.,
More informationSemiconductor Lasers Semiconductors were originally pumped by lasers or e-beams First diode types developed in 1962: Create a pn junction in
Semiconductor Lasers Semiconductors were originally pumped by lasers or e-beams First diode types developed in 1962: Create a pn junction in semiconductor material Pumped now with high current density
More informationA CW seeded femtosecond optical parametric amplifier
Science in China Ser. G Physics, Mechanics & Astronomy 2004 Vol.47 No.6 767 772 767 A CW seeded femtosecond optical parametric amplifier ZHU Heyuan, XU Guang, WANG Tao, QIAN Liejia & FAN Dianyuan State
More informationcw, 325nm, 100mW semiconductor laser system as potential substitute for HeCd gas lasers
cw, 35nm, 1mW semiconductor laser system as potential substitute for HeCd gas lasers T. Schmitt 1, A. Able 1,, R. Häring 1, B. Sumpf, G. Erbert, G. Tränkle, F. Lison 1, W. G. Kaenders 1 1) TOPTICA Photonics
More information6.1 Thired-order Effects and Stimulated Raman Scattering
Chapter 6 Third-order Effects We are going to focus attention on Raman laser applying the stimulated Raman scattering, one of the third-order nonlinear effects. We show the study of Nd:YVO 4 intracavity
More informationIsolator-Free 840-nm Broadband SLEDs for High-Resolution OCT
Isolator-Free 840-nm Broadband SLEDs for High-Resolution OCT M. Duelk *, V. Laino, P. Navaretti, R. Rezzonico, C. Armistead, C. Vélez EXALOS AG, Wagistrasse 21, CH-8952 Schlieren, Switzerland ABSTRACT
More informationSUPPLEMENTARY INFORMATION
Electrically pumped continuous-wave III V quantum dot lasers on silicon Siming Chen 1 *, Wei Li 2, Jiang Wu 1, Qi Jiang 1, Mingchu Tang 1, Samuel Shutts 3, Stella N. Elliott 3, Angela Sobiesierski 3, Alwyn
More informationOBIS CORE LS. Next Generation Miniaturized OEM Laser Module FEATURES
OBIS CORE LS Next Generation Miniaturized OEM Laser Module The Coherent OBIS CORE LS suite of products provide miniaturized building blocks for OEM instruments designers. Consisting out of the Optically
More informationOptoelectronics ELEC-E3210
Optoelectronics ELEC-E3210 Lecture 4 Spring 2016 Outline 1 Lateral confinement: index and gain guiding 2 Surface emitting lasers 3 DFB, DBR, and C3 lasers 4 Quantum well lasers 5 Mode locking P. Bhattacharya:
More informationBistability in Bipolar Cascade VCSELs
Bistability in Bipolar Cascade VCSELs Thomas Knödl Measurement results on the formation of bistability loops in the light versus current and current versus voltage characteristics of two-stage bipolar
More informationDESIGN OF COMPACT PULSED 4 MIRROR LASER WIRE SYSTEM FOR QUICK MEASUREMENT OF ELECTRON BEAM PROFILE
1 DESIGN OF COMPACT PULSED 4 MIRROR LASER WIRE SYSTEM FOR QUICK MEASUREMENT OF ELECTRON BEAM PROFILE PRESENTED BY- ARPIT RAWANKAR THE GRADUATE UNIVERSITY FOR ADVANCED STUDIES, HAYAMA 2 INDEX 1. Concept
More informationPassively Q-switched m intracavity optical parametric oscillator
Passively Q-switched 1.57- m intracavity optical parametric oscillator Yuri Yashkir and Henry M. van Driel We demonstrate an eye-safe KTP-based optical parametric oscillator OPO driven intracavity by a
More informationFPPO 1000 Fiber Laser Pumped Optical Parametric Oscillator: FPPO 1000 Product Manual
Fiber Laser Pumped Optical Parametric Oscillator: FPPO 1000 Product Manual 2012 858 West Park Street, Eugene, OR 97401 www.mtinstruments.com Table of Contents Specifications and Overview... 1 General Layout...
More informationHighly Reliable 40-mW 25-GHz 20-ch Thermally Tunable DFB Laser Module, Integrated with Wavelength Monitor
Highly Reliable 4-mW 2-GHz 2-ch Thermally Tunable DFB Laser Module, Integrated with Wavelength Monitor by Tatsuya Kimoto *, Tatsushi Shinagawa *, Toshikazu Mukaihara *, Hideyuki Nasu *, Shuichi Tamura
More informationModule 4 : Third order nonlinear optical processes. Lecture 24 : Kerr lens modelocking: An application of self focusing
Module 4 : Third order nonlinear optical processes Lecture 24 : Kerr lens modelocking: An application of self focusing Objectives This lecture deals with the application of self focusing phenomena to ultrafast
More information10W Injection-Locked CW Nd:YAG laser
10W Injection-Locked CW Nd:YAG laser David Hosken, Damien Mudge, Peter Veitch, Jesper Munch Department of Physics The University of Adelaide Adelaide SA 5005 Australia Talk Outline Overall motivation ACIGA
More information