High Power Fiber lasers and Amplifiers: A tutorial overview
|
|
- Elfreda Thornton
- 5 years ago
- Views:
Transcription
1 WSOF-2010 High Power Fiber lasers and Amplifiers: A tutorial overview William.Torruellas@JHUAPL.edu The views, opinions, and/or findings contained in this article/presentation are those of the author/presenter and should not be interpreted as representing the official views or policies, either expressed or implied, of the Defense Advanced Research Projects Agency or the Department of Defense. Distribution Statement "A" (Approved for Public Release, Distribution Unlimited) Acknowledgements: K. Tankala, B. Samson (Nufern) D. Brown, M. Dennis (JHU-APL) R. Berdine (AFRL) J. Mangano (DARPA-MTO)
2 Overview of the Presentation Optical Fibers: System Design Consideration Advantages of Optical Fiber Lasers Large Core Fibers: Single or Multi-Mode Fibers Gain in Fibers HP Fibers: Nonlinear Factory Nonlinear Limitations: SBS, SRS, Optical Damage Conclusions
3 Why are HP fiber lasers becoming attractive? Commercially achieved Fiber Laser Performances Fiber Output Power (kw) m M2>15 M2=6 M2=1 20 kw/m x 2.8 x 0.8 m DARPA 1kW Race Year IPG-08 M 2 ~30 Projected Performance Today
4 Overall Advantages of Optical Fiber for HP
5 Fiber Basics: A Simple but Very Rich Geometry! An important design difference between fibers for telecom and fiber lasers is the low index coating applied to the fiber The primary coating in the case of doubleclad fibers for lasers is low index polymer (fluorinated) forming a high NA waveguide for the pump light to propagate Inner cladding (Silica) Outer cladding (polymer) Doped Core Pump light from diode
6 Brightness Enhancer Brightness: Etendue theorem: Etendue is Minimum Diode Laser Biggest Issue! Diodes: -Single Emitter Junction : 1x100µm (60 o x5 o ) -Bar : 19x(1x100)µm (60 o x5 o ) -Fiber Cladding : µm (20 o aperture NA=0.45) -Fiber Core : µm (<5 o aperture NA=0.06)
7 Fiber Lasers emit in Atmosphere s Near-IR Transmission Windows: WAVELENGTH CONVERTERS 20km Transmission Atmospheric Visibility: 5,10, 23km YDFA EDFA/EYDFA HoDFA
8 Fiber Lidar : Delocalized hardware
9 High Efficiency > 25% WP Excellent Beam Quality M 2 1 Short Pulses <1ns, Eye Safety Collimator Polarizer & Focusing Lens Pump Diode Fiber Laser PPLN & Oven
10 Truly Opto-Electronics Isolators MZI Seed Diode Laser RF Amp Pump Diodes MZI Bias Controller Comm. Cable Power Cable
11 Compatible with Telecom-Like Architectures Intermediate Stage 1-7W of 976nm 60A diode driver Pump/Signal all DCF Combiner 1 st Power Amp 12-21W of 976nm 2 nd Power Amp 25W-60W of Pump at 976nm
12 HEL Yb 1 kw amplifier ~$150/Watt 10kW Chiller high power splice tray CPU Splice tray 1 Power Supply diodes
13 Enabling Incoherent/Coherent Beam Combining Spatial Beam Combining: reduces thermal blooming Adaptive Compensation: Improves optical fluence on target Modified Scaling Laws 40kW Free Propagation Single beam Tilt and Blooming 4x10kW Free Propagation Tilt and Blooming 4x10kW with Adaptive Compensation Tilt and Blooming are removed Intensity Patterns every 200m are shown in all 3 cases
14 Thermal Management: (uniformly distributed thermal load in cylindrical rod) T melt = 1982 o K
15 Thermal Performance
16 Comparison with Nd:YAG Thermal Adavantage = Geometry+Efficiency
17 Large Core Fibers Single or Multi-Mode Fibers?
18 Example of Modes Profiles LP 01 LP 03 LP 02 LP 04
19 Confinement Factor: Overlap of the optical mode with the gain region LP 01 LP 03
20 Bend Losses and Mode Filtering Bend radius acts as a loss for the Optical field
21 Mode Filtering
22 Bend Losses are used for High Order Transverse Mode Filtering Final Filtering is Fundamental Transverse Mode Injection
23 Gain in Fibers
24 Energy Levels of Ytterbium: Quasi 3-level Almost ideal quantum defect
25 Cross Sections of Ytterbium in SiO 2 976nm 1030nm 915nm 1064nm
26 Typical Amplification Conditions
27 Example of Results SBS result in good agreement with reported result in the literature
28 HP Fibers : Nonlinear Factory Limits applications
29 Bulk Optical Damage for 6ns Pulses
30 Bulk Optical Damage for 6ns pulses S. Webster et al., in SPIE Proceedings of the 2006 Boulder Optical Damage conference
31 Surface Damage can limit how many milli- Joules can be transmitted or generated
32 Surface damage Limits the maximum Fluence For 1ns Pulses the Bulk Damage is > 300 J/cm 2 For 1ns Pulses the Surface damage is > 50 J/cm 2 Without EndCap For Aeff 2000 µm 2 Maximum Pulse energy is 1mJ With EndCap Aeff 5000µm 2 Maximum Pulse energy is 2.5mJ Reliable Operation is 1ns
33 NLO performance : Critical Self-Focusing for the Fiber and End-Cap n 2 = 2.5 x m 2 /W; P crit = 0.15 x λ 2 /(n o x n 2 )=4.5MW Critical Self-Focusing limits the propagation in the End-Cap 1ns operation => E p < 3mJ 0.5ns operation => Ep < 1.5mJ Z crit = 2.85mm for (25µm waist A eff = 2000 µm 2 ) Z o = 2.73mm for (25µm waist A eff = 2000 µm 2 ) E p (1ns) = 1.5mJ P av = 15W A eff (endcap) = 2.5x 2000 µm 2 = 5000 µm 2 E p (surface-damage) < 2.5mJ
34 Common Nonlinear Optical Interactions Nonlinear optical Interactions: SPM, XPM, 4WM: Ultrafast nonlinear perturbation of the electronic response of the optical polarizability. These interactions perturb the optical Phase. When the several optical fields are present energy exchange can occur periodically. SRS: Ultrafast (20fs) nonlinear interaction of the optical field with Optical- Phonons. The optical interaction weakly perturbs the atomic structure changing the refractive index but more importantly transfers power between optical fields. SBS: Slow (5-10ns) nonlinear interaction between the optical fields and acoustic-phonons. The optical field changes the atomic lattice and results in an acoustic wave reflecting energy in the counter-propagating direction.
35 SPM : Self-Phase-Modulation
36 How much SPM is acceptable? Rule of thumb: Large Aeff are needed for High peak power operation Spectral Broadening: For a Gaussian pulse and large SPM the resulting spectral broadening is almost equal to the Nonlinear Phase Shift
37 0.75ns/pulse and 12Kpps A eff =500µm 2 ; L eff = 1m
38 4WM : Other Four-Wave-Mixing Interactions XPM: Cross Phase Modulation The cross-phase modulation is twice as strong as the self-phase 4WM: Four Wave Mixing Results in energy exchange when conservation of photon energy and phase matching are met.
39 4WM example: 4WM images
40 4WM, XPM, SPM and SRS results in Super-Continuum Generation
41 SRS: Stimulated Raman Scattering SRS: Stimulated Raman Scattering The Nonlinearity is complex resulting in energy transfer between the pump and signal laser beams. The Pump and the signal are in resonance with a Raman Active Mode SRS is always Phase-Matched in Single Mode Fibers.
42 g r = m/w
43 SRS: Limits Power in Band Requires shorter fiber => Lowered efficiency
44 A eff as a fiber design parameter for SRS In some cases the limitation from standard step index fiber even at 30mm core diameter is still a problem Designs to further increase the mode field area have been established and demonstrated in Yb-doped amplifiers operating at very high peak power (>1MW) Normalized Signal Power Step index fiber ~3X increase in MFA Normalized Signal Power LFM fiber Radial Dimension µ m) ( Radial Dimension µ m) (
45 Solution to SRS limitation: Increasing A eff from 1300µm 2 to 2000µm 2 Increase in efficiency
46 How long can I make a fiber delivery fiber? P = 1kW gr = 1e-13 m/w Aeff = 150µm 2 Exponential Gain= G=exp(gr P/Aeff L) = exp(30) L < 45m This assumes no prior signal at the Raman Shifted Wavelength. For P= 10kW => L < 3m (Practical problem)
47 Stimulated Brillouin Scattering Single Frequency (<1MHz) High Power Fiber Amplifiers are limited by Stimulated Brillouin Scattering (SBS). Highest powers achieved to date: 200W from commercial vendors (Thermal Engineering) 500W Hero-laboratory results Large Core Double Clad-Fiber Amplifier ~ m long I f I b V L On optical signal I f is amplified and interacts with backward propagating signal I b generated by spontaneous noise. The interaction creates a traveling acoustic grating due to electrostriction. The backward propagating signal is coherently amplified by the backscattering of the strong signal during amplification. SATURATION OF AMPLIFIED SIGNAL AND NOISY OUTPUT
48 SBS Gain In the unsaturated/low signal regime the backward propagation signal grows exponentially. The exponential gain depends on: - Material: Difficult to engineer - Polarization: The system requires linear polarization - The fiber length: Trade-off with thermal design and doping quenching - The ratio of the Field (Optical & Acoustic) Spatial Overlap functions and the Optical Mode Effective Area Fiber Core design
49 How Much Power Can I get in a Single Frequency with a Step Index Fiber? L = 10m g SBS = 2e-11 m/w A eff = 500µm 2 Exponential Gain= G=exp(g SBS P/A eff L) = exp(30) P < 75W This assumes Signal Less than 50MHz linewidth.
50 Acoustic Field & Optical Intensity for Large Core Step index Fiber NA=0.06
51 Single Core Double Clad Fibers NA=0.06 Modifying core dimension has limited impact on SBS frequency shift Modifying core dimension has no impact on ratio of overlap and Effective Area Core modification has little impact on SBS gain Leave it as is!
52 Acoustic Batman Profiles F OvLp (Step-Index)>4xF OvLp (Batman)
53 Potential Recipe Leave Core Unchanged Dope Second Core with GeO 2 and F Leaving refractive index unchanged Induce a large change in acoustic index
54 5900 m/s Low Order Mode 5950 m/s 11 th acoustic Order Mode 5850 m/s
55 Acoustic Mode Engineering: Three SBS Resonances
56 Acoustic Design: Moves ALL Acoustic modes outside of the core Three Parameters are investigated: g Dictated by fabrication
57 Predicted SBS Spectrum Baseline Step Index Fiber Based on Measured Coefficients Based on Literature Data For acoustic coefficients A Fiber design with a x5-10 improvement is theoretically achievable
58 Potential improvements with Fiber Core Designs No adjustable parameters: g SBS = 2e-11 m/w 7 x Suppression
59 Achieved Performance to date: 275W SBS Threshold Gen-II-b YDFA: 25/400; MFD=17µm 100mW Threshold Baseline SI 25/400 CW Exp. Pulsed Exp. APL Model Gen-II-b 5X improvement With Gen-II-c MFD=20µm 6-7X improvement
60 Impact of Nonlinearities SBS-SPM-Raman Field time dependent Model is needed g(z,t) is obtained from rate equations g b, g R and n 2 are for SiO 2
61 Impact of Pulse-width/Bandwidth on SBS Threshold for Amplitude Modulation Predicted SBS-SRS Threshold for repetitive Pulse operation 30/250 YDFA Dominated by Walk-Off Dominated by Phonon-Lifetime Dominated by Peak Power
62 Conclusions YDFA can be modeled accurately in the CW and repetitive pulse regimes 10kW is the practical limit for SM operation >50kW is commercially available only issue is cost of diodes. (50kW in 2008) In the CW regime SBS limits the maximum power for narrow linewidth sources (<100 MHz) In the short pulse regime SPM+4WM broaden the spectra SRS limits the energy in band for sub 1ns pulses Optical Damage limits the Peak Power to <1MW
End Capped High Power Assemblies
Fiberguide s end capped fiber optic assemblies allow the user to achieve higher coupled power into a fiber core by reducing the power density at the air/ silica interface, commonly the point of laser damage.
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 informationRecent Progress in Active Fiber Designs and Monolithic High Power Fiber Laser Devices. Kanishka Tankala, Adrian Carter and Bryce Samson
Recent Progress in Active Fiber Designs and Monolithic High Power Fiber Laser Devices Kanishka Tankala, Adrian Carter and Bryce Samson Advantages of Fiber Lasers Features Highly efficient diode pumped
More informationHigh peak power pulsed single-mode linearly polarized LMA fiber amplifier and Q-switch laser
High peak power pulsed single-mode linearly polarized LMA fiber amplifier and Q-switch laser V. Khitrov*, B. Samson, D. Machewirth, D. Yan, K. Tankala, A. Held Nufern, 7 Airport Park Road, East Granby,
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 informationFiber lasers: The next generation
Fiber lasers: The next generation David N Payne Optoelectronics Research Centre and SPI Lasers kw fibre laser No connection! After the telecoms EDFA The fibre laser another fibre revolution? Fibre laser
More informationDevelopment of Nano Second Pulsed Lasers Using Polarization Maintaining Fibers
Development of Nano Second Pulsed Lasers Using Polarization Maintaining Fibers Shun-ichi Matsushita*, * 2, Taizo Miyato*, * 2, Hiroshi Hashimoto*, * 2, Eisuke Otani* 2, Tatsuji Uchino* 2, Akira Fujisaki*,
More informationFiber lasers and their advanced optical technologies of Fujikura
Fiber lasers and their advanced optical technologies of Fujikura Kuniharu Himeno 1 Fiber lasers have attracted much attention in recent years. Fujikura has compiled all of the optical technologies required
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 informationChapter 12: Optical Amplifiers: Erbium Doped Fiber Amplifiers (EDFAs)
Chapter 12: Optical Amplifiers: Erbium Doped Fiber Amplifiers (EDFAs) Prof. Dr. Yaocheng SHI ( 时尧成 ) yaocheng@zju.edu.cn http://mypage.zju.edu.cn/yaocheng 1 Traditional Optical Communication System Loss
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 informationMulti-MW peak power, single transverse mode operation of a 100 micron core diameter, Yb-doped photonic crystal rod amplifier
Multi-MW peak power, single transverse mode operation of a 1 micron core diameter, Yb-doped photonic crystal rod amplifier Fabio Di Teodoro and Christopher D. Brooks Aculight Corporation, 22121 2th Ave.
More informationInvestigation of the impact of fiber Bragg grating bandwidth on the efficiency of a fiber Raman laser
Investigation of the impact of fiber Bragg grating bandwidth on the efficiency of a fiber Raman laser US-Australia meeting May12, 2015 Leanne J. Henry, Michael Klopfer (1), and Ravi Jain (1) (1) University
More informationThe absorption of the light may be intrinsic or extrinsic
Attenuation Fiber Attenuation Types 1- Material Absorption losses 2- Intrinsic Absorption 3- Extrinsic Absorption 4- Scattering losses (Linear and nonlinear) 5- Bending Losses (Micro & Macro) Material
More informationPhotonic Crystal Fiber Interfacing. In partnership with
Photonic Crystal Fiber Interfacing In partnership with Contents 4 Photonics Crystal Fibers 6 End-capping 8 PCF connectors With strong expertise in designing fiber lasers and fused fiber components, ALPhANOV,
More informationLasers à fibres ns et ps de forte puissance. Francois SALIN EOLITE systems
Lasers à fibres ns et ps de forte puissance Francois SALIN EOLITE systems Solid-State Laser Concepts rod temperature [K] 347 -- 352 342 -- 347 337 -- 342 333 -- 337 328 -- 333 324 -- 328 319 -- 324 315
More informationECE 340 Lecture 29 : LEDs and Lasers Class Outline:
ECE 340 Lecture 29 : LEDs and Lasers Class Outline: Light Emitting Diodes Lasers Semiconductor Lasers Things you should know when you leave Key Questions What is an LED and how does it work? How does a
More information2. EXPERIMENTAL DESIGN
All-glass Fiber Amplifier Pumped by Ultra-high Brightness Pumps Charles X. Yu*, Oleg Shatrovoy, and T. Y. Fan MIT Lincoln Lab, 244 Wood Street, Lexington, MA, USA 02421 *chars@ll.mit.edu ABSTRACT We investigate
More informationKey Questions. What is an LED and how does it work? How does a laser work? How does a semiconductor laser work? ECE 340 Lecture 29 : LEDs and Lasers
Things you should know when you leave Key Questions ECE 340 Lecture 29 : LEDs and Class Outline: What is an LED and how does it How does a laser How does a semiconductor laser How do light emitting diodes
More informationContinuum White Light Generation. WhiteLase: High Power Ultrabroadband
Continuum White Light Generation WhiteLase: High Power Ultrabroadband Light Sources Technology Ultrafast Pulses + Fiber Laser + Non-linear PCF = Spectral broadening from 400nm to 2500nm Ultrafast Fiber
More informationA 100 W all-fiber linearly-polarized Yb-doped single-mode fiber laser at 1120 nm
A 1 W all-fiber linearly-polarized Yb-doped single-mode fiber laser at 112 nm Jianhua Wang, 1,2 Jinmeng Hu, 1 Lei Zhang, 1 Xijia Gu, 3 Jinbao Chen, 2 and Yan Feng 1,* 1 Shanghai Key Laboratory of Solid
More informationSurvey Report: Laser R&D
Survey Report: Laser R&D Peter Moulton VP/CTO, Q-Peak, Inc. DLA-2011 ICFA Mini-Workshop on Dielectric Laser Accelerators September 15, 2011 SLAC, Menlo Park, CA Outline DLA laser requirements (one version)
More informationFiber Lasers for EUV Lithography
Fiber Lasers for EUV Lithography A. Galvanauskas, Kai Chung Hou*, Cheng Zhu CUOS, EECS Department, University of Michigan P. Amaya Arbor Photonics, Inc. * Currently with Cymer, Inc 2009 International Workshop
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 informationHigh Power Compact Fiber Chirped Pulse Amplifiers at 1558-nm using Er/Yb LMA Fibers and Chirped Volume Bragg Grating Compressors
High Power Compact Fiber Chirped Pulse Amplifiers at 1558-nm using Er/Yb LMA Fibers and Chirped Volume Bragg Grating Compressors Ming-Yuan Cheng, Almantas Galvanauskas University of Michigan Vadim Smirnov,
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 informationMitigation of Self-Pulsing in High Power Pulsed Fiber Lasers
Mitigation of Self-Pulsing in High Power Pulsed Fiber Lasers Yusuf Panbiharwala, Deepa Venkitesh, Balaji Srinivasan* Department of Electrical Engineering, Indian Institute of Technology Madras. *Email
More informationApplication Instruction 002. Superluminescent Light Emitting Diodes: Device Fundamentals and Reliability
I. Introduction II. III. IV. SLED Fundamentals SLED Temperature Performance SLED and Optical Feedback V. Operation Stability, Reliability and Life VI. Summary InPhenix, Inc., 25 N. Mines Road, Livermore,
More informationProgress in ultrafast Cr:ZnSe Lasers. Evgueni Slobodtchikov, Peter Moulton
Progress in ultrafast Cr:ZnSe Lasers Evgueni Slobodtchikov, Peter Moulton Topics Diode-pumped Cr:ZnSe femtosecond oscillator CPA Cr:ZnSe laser system with 1 GW output This work was supported by SBIR Phase
More informationModBox-FE-125ps-10mJ. Performance Highlights FEATURES APPLICATIONS. Electrical & Optical Pulse Diagrams
The System-FE-1064nm is set to generate short shaped pulses with high extinction ratio at 1064.1 nm. It allows dynamic extinction ratio up to 55 db with user adjustable pulse duration, repetition rate
More informationEE 233. LIGHTWAVE. Chapter 2. Optical Fibers. Instructor: Ivan P. Kaminow
EE 233. LIGHTWAVE SYSTEMS Chapter 2. Optical Fibers Instructor: Ivan P. Kaminow PLANAR WAVEGUIDE (RAY PICTURE) Agrawal (2004) Kogelnik PLANAR WAVEGUIDE a = (n s 2 - n c2 )/ (n f 2 - n s2 ) = asymmetry;
More informationIntegrated disruptive components for 2µm fibre Lasers ISLA. 2 µm Sub-Picosecond Fiber Lasers
Integrated disruptive components for 2µm fibre Lasers ISLA 2 µm Sub-Picosecond Fiber Lasers Advantages: 2 - microns wavelength offers eye-safety potentially higher pulse energy and average power in single
More informationChapter 8. Wavelength-Division Multiplexing (WDM) Part II: Amplifiers
Chapter 8 Wavelength-Division Multiplexing (WDM) Part II: Amplifiers Introduction Traditionally, when setting up an optical link, one formulates a power budget and adds repeaters when the path loss exceeds
More informationMultiwatts narrow linewidth fiber Raman amplifiers
Multiwatts narrow linewidth fiber Raman amplifiers Yan Feng *, Luke Taylor, and Domenico Bonaccini Calia European Southern Observatory, Karl-Schwarzschildstr., D-878 Garching, Germany * Corresponding author:
More informationX-CAN. A coherent amplification network of femtosecond fiber amplifiers
X-CAN A coherent amplification network of femtosecond fiber amplifiers Jean-Christophe Chanteloup, Louis Daniault LULI, Ecole Polytechnique, CNRS, CEA, UPMC, Route de Saclay, 91128, Palaiseau, France Gérard
More informationSurvey Report: Laser R&D
Survey Report: Laser R&D Peter Moulton VP/CTO, Q-Peak, Inc. DLA-2011 ICFA Mini-Workshop on Dielectric Laser Accelerators September 15, 2011 SLAC, Menlo Park, CA Outline DLA laser requirements (one version)
More informationOptical Fiber Technology. Photonic Network By Dr. M H Zaidi
Optical Fiber Technology Numerical Aperture (NA) What is numerical aperture (NA)? Numerical aperture is the measure of the light gathering ability of optical fiber The higher the NA, the larger the core
More informationA continuous-wave Raman silicon laser
A continuous-wave Raman silicon laser Haisheng Rong, Richard Jones,.. - Intel Corporation Ultrafast Terahertz nanoelectronics Lab Jae-seok Kim 1 Contents 1. Abstract 2. Background I. Raman scattering II.
More informationDr. Rüdiger Paschotta RP Photonics Consulting GmbH. Competence Area: Fiber Devices
Dr. Rüdiger Paschotta RP Photonics Consulting GmbH Competence Area: Fiber Devices Topics in this Area Fiber lasers, including exotic types Fiber amplifiers, including telecom-type devices and high power
More informationHigh-power fibre Raman lasers at the University of Southampton
High-power fibre Raman lasers at the University of Southampton Industry Day Southampton, April 2 2014 Johan Nilsson Optoelectronics Research Centre University of Southampton, England Also consultant to
More informationThe Development of a High Quality and a High Peak Power Pulsed Fiber Laser With a Flexible Tunability of the Pulse Width
The Development of a High Quality and a High Peak Power Pulsed Fiber Laser With a Flexible Tunability of the Pulse Width Ryo Kawahara *1, Hiroshi Hashimoto *1, Jeffrey W. Nicholson *2, Eisuke Otani *1,
More informationAbsorption: in an OF, the loss of Optical power, resulting from conversion of that power into heat.
Absorption: in an OF, the loss of Optical power, resulting from conversion of that power into heat. Scattering: The changes in direction of light confined within an OF, occurring due to imperfection in
More informationOptical 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 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 informationHigh-brightness pumping has several
More Efficient and Less Complex ENHANCING THE SPECTRAL AND SPATIAL BRIGHTNESS OF DIODE LASERS Recent breakthroughs in semiconductor laser technology have improved the laser system compactness, efficiency,
More informationTypes of losses in optical fiber cable are: Due to attenuation, the power of light wave decreases exponentially with distance.
UNIT-II TRANSMISSION CHARACTERISTICS OF OPTICAL FIBERS SIGNAL ATTENUATION: Signal attenuation in an optical fiber is defined as the decrease in light power during light propagation along an optical fiber.
More informationAdvanced Specialty Fiber Designs for High Power Fiber Lasers
Clemson University TigerPrints All Dissertations Dissertations 8-2016 Advanced Specialty Fiber Designs for High Power Fiber Lasers Guancheng Gu Clemson University Follow this and additional works at: https://tigerprints.clemson.edu/all_dissertations
More informationSingle frequency MOPA system with near diffraction limited beam
Single frequency MOPA system with near diffraction limited beam quality D. Chuchumishev, A. Gaydardzhiev, A. Trifonov, I. Buchvarov Abstract Near diffraction limited pulses of a single-frequency and passively
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 informationEXPERIMENTAL STUDY OF SBS SUPPRESSION VIA WHITE NOISE PHASE MODULATION (POSTPRINT)
AFRL-RD-PS- TP-2015-0008 AFRL-RD-PS- TP-2015-0008 EXPERIMENTAL STUDY OF SBS SUPPRESSION VIA WHITE NOISE PHASE MODULATION (POSTPRINT) Brian Anderson, et al. 10 February 2014 Technical Paper APPROVED FOR
More informationGeneration of gigantic nanosecond pulses through Raman-Brillouin- Rayleigh cooperative process in single-mode optical fiber
Generation of gigantic nanosecond pulses through Raman-Brillouin- Rayleigh cooperative process in single-mode optical fiber Gautier Ravet a, Andrei A. Fotiadi a, b, Patrice Mégret a, Michel Blondel a a
More informationInvestigations on the performance of lidar measurements with different pulse shapes using a multi-channel Doppler lidar system
Th12 Albert Töws Investigations on the performance of lidar measurements with different pulse shapes using a multi-channel Doppler lidar system Albert Töws and Alfred Kurtz Cologne University of Applied
More informationModBox-SB-NIR Near Infra Red Spectral Broadening Unit
The Spectral Broadening ModBox achieves the broadening of an optical signal by modulating its phase via the mean of a very efficient LiNb0 3 phase modulator. A number of side bands are created over a spectral
More informationPractical Aspects of Raman Amplifier
Practical Aspects of Raman Amplifier Contents Introduction Background Information Common Types of Raman Amplifiers Principle Theory of Raman Gain Noise Sources Related Information Introduction This document
More informationHigh-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 informationThin-Disc-Based Driver
Thin-Disc-Based Driver Jochen Speiser German Aerospace Center (DLR) Institute of Technical Physics Solid State Lasers and Nonlinear Optics Folie 1 German Aerospace Center! Research Institution! Space Agency!
More informationFiber Laser Chirped Pulse Amplifier
Fiber Laser Chirped Pulse Amplifier White Paper PN 200-0200-00 Revision 1.2 January 2009 Calmar Laser, Inc www.calmarlaser.com Overview Fiber lasers offer advantages in maintaining stable operation over
More informationA new picosecond Laser pulse generation method.
PULSE GATING : A new picosecond Laser pulse generation method. Picosecond lasers can be found in many fields of applications from research to industry. These lasers are very common in bio-photonics, non-linear
More informationHigh-power Yb-doped continuous-wave and pulsed fibre lasers
PRAMANA c Indian Academy of Sciences Vol. 82, No. 1 journal of January 2014 physics pp. 15 27 High-power Yb-doped continuous-wave and pulsed fibre lasers B N UPADHYAYA Solid State Laser Division, Raja
More informationGuided Propagation Along the Optical Fiber. Xavier Fernando Ryerson Comm. Lab
Guided Propagation Along the Optical Fiber Xavier Fernando Ryerson Comm. Lab The Nature of Light Quantum Theory Light consists of small particles (photons) Wave Theory Light travels as a transverse electromagnetic
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 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 informationDependence of stimulated Brillouin scattering in pulsed fiber amplifier on signal linewidth, pulse duration, and repetition rate
Dependence of stimulated Brillouin scattering in pulsed fiber amplifier on signal linewidth, pulse duration, and repetition rate Rongtao Su ( Â ), Pu Zhou ( ), Xiaolin Wang ( ), Hu Xiao ( Ñ), and Xiaojun
More informationUNIT-II : SIGNAL DEGRADATION IN OPTICAL FIBERS
UNIT-II : SIGNAL DEGRADATION IN OPTICAL FIBERS The Signal Transmitting through the fiber is degraded by two mechanisms. i) Attenuation ii) Dispersion Both are important to determine the transmission characteristics
More informationDESIGN TEMPLATE ISSUES ANALYSIS FOR ROBUST DESIGN OUTPUT. performance, yield, reliability
DESIGN TEMPLATE ISSUES performance, yield, reliability ANALYSIS FOR ROBUST DESIGN properties, figure-of-merit thermodynamics, kinetics, process margins process control OUTPUT models, options Optical Amplification
More informationIntroduction Fundamental of optical amplifiers Types of optical amplifiers
ECE 6323 Introduction Fundamental of optical amplifiers Types of optical amplifiers Erbium-doped fiber amplifiers Semiconductor optical amplifier Others: stimulated Raman, optical parametric Advanced application:
More informationSetup of the four-wavelength Doppler lidar system with feedback controlled pulse shaping
Setup of the four-wavelength Doppler lidar system with feedback controlled pulse shaping Albert Töws and Alfred Kurtz Cologne University of Applied Sciences Steinmüllerallee 1, 51643 Gummersbach, Germany
More informationOptical 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 informationBragg 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 informationLasers PH 645/ OSE 645/ EE 613 Summer 2010 Section 1: T/Th 2:45-4:45 PM Engineering Building 240
Lasers PH 645/ OSE 645/ EE 613 Summer 2010 Section 1: T/Th 2:45-4:45 PM Engineering Building 240 John D. Williams, Ph.D. Department of Electrical and Computer Engineering 406 Optics Building - UAHuntsville,
More informationPicosecond laser system based on microchip oscillator
JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS Vol. 10, No. 11, November 008, p. 30-308 Picosecond laser system based on microchip oscillator A. STRATAN, L. RUSEN *, R. DABU, C. FENIC, C. BLANARU Department
More informationGuided Propagation Along the Optical Fiber. Xavier Fernando Ryerson University
Guided Propagation Along the Optical Fiber Xavier Fernando Ryerson University The Nature of Light Quantum Theory Light consists of small particles (photons) Wave Theory Light travels as a transverse electromagnetic
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 informationAll-Optical Signal Processing and Optical Regeneration
1/36 All-Optical Signal Processing and Optical Regeneration Govind P. Agrawal Institute of Optics University of Rochester Rochester, NY 14627 c 2007 G. P. Agrawal Outline Introduction Major Nonlinear Effects
More informationPh.D. Course Spring Wireless Communications. Wirebound Communications
Ph.D. Course Spring 2005 Danyo Danev associate professor Div. Data Transmission, Dept. Electrical Engineering Linköping University SWEDEN Wireless Communications Radio transmissions Mobile telephony Satellite
More informationNGS-13, Guildford UK, July 2007
NGS-1, Guildford UK, July 7 Semiconductor light emitters for mid-ir spectral region -based Quantum Cascade Room temperature operated type-i QW -based light emitters with wavelength up to.4um L. Shterengas,
More informationLecture 3 Fiber Optical Communication Lecture 3, Slide 1
Lecture 3 Dispersion in single-mode fibers Material dispersion Waveguide dispersion Limitations from dispersion Propagation equations Gaussian pulse broadening Bit-rate limitations Fiber losses Fiber Optical
More informationActively Q-switched 1.6-mJ tapered double-clad ytterbium-doped fiber laser
Actively Q-switched 1.6-mJ tapered double-clad ytterbium-doped fiber laser Juho Kerttula, 1,* Valery Filippov, 1 Yuri Chamorovskii, 2 Konstantin Golant, 2 and Oleg G. Okhotnikov, 1 1 Optoelectronics Research
More informationPhotonics (OPTI 510R 2017) - Final exam. (May 8, 10:30am-12:30pm, R307)
Photonics (OPTI 510R 2017) - Final exam (May 8, 10:30am-12:30pm, R307) Problem 1: (30pts) You are tasked with building a high speed fiber communication link between San Francisco and Tokyo (Japan) which
More informationModBox-FE-NIR Near-Infra Red Front-End Laser Source
FEATURES Optical waveform flexibility Low jitter Low rise & fall times Very high extinction ratio and stability Proven solution APPLICATIONS Inertial confinement fusion Interaction of intense light with
More informationNON-AMPLIFIED PHOTODETECTOR USER S GUIDE
NON-AMPLIFIED PHOTODETECTOR USER S GUIDE Thank you for purchasing your Non-amplified Photodetector. This user s guide will help answer any questions you may have regarding the safe use and optimal operation
More informationFiber Optic Communications Communication Systems
INTRODUCTION TO FIBER-OPTIC COMMUNICATIONS A fiber-optic system is similar to the copper wire system in many respects. The difference is that fiber-optics use light pulses to transmit information down
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 informationOptical 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 informationPerformance Analysis of Designing a Hybrid Optical Amplifier (HOA) for 32 DWDM Channels in L-band by using EDFA and Raman Amplifier
Performance Analysis of Designing a Hybrid Optical Amplifier (HOA) for 32 DWDM Channels in L-band by using EDFA and Raman Amplifier Aied K. Mohammed, PhD Department of Electrical Engineering, University
More informationNufern 980 nm Select Cut-Off Single-Mode Fiber
Nufern 980 nm Select Cut-Off Single-Mode Fiber Nufern s 980 nm high-performance select cut-off single-mode fibers are optimized for use by component manufacturers in the telecommunications wavelengths.
More informationHigh peak power singlefrequency. applications
High peak power singlefrequency MOPFA for lidar applications L. Lombard, G. Canat, A. Durécu, J. Le Gouët, A. Dolfi- Bouteyre, M. Valla, B. Augère, D Goular, C. Besson. Applications of wind lidars Wake
More informationHigh Rep-Rate KrF Laser Development and Intense Pulse Interaction Experiments for IFE*
High Rep-Rate KrF Laser Development and Intense Pulse Interaction Experiments for IFE* Y. Owadano, E. Takahashi, I. Okuda, I. Matsushima, Y. Matsumoto, S. Kato, E. Miura and H.Yashiro 1), K. Kuwahara 2)
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 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 informationOptimization of supercontinuum generation in photonic crystal fibers for pulse compression
Optimization of supercontinuum generation in photonic crystal fibers for pulse compression Noah Chang Herbert Winful,Ted Norris Center for Ultrafast Optical Science University of Michigan What is Photonic
More informationUltra-Broadband Fiber-Based Optical Supercontinuum Source
Ultra-Broadband Fiber-Based Optical Supercontinuum Source Luo Ma A Thesis In the Department of Electrical and Computer Engineering Presented in Partial Fulfillment of the Requirements for the Degree of
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 informationHow to build an Er:fiber femtosecond laser
How to build an Er:fiber femtosecond laser Daniele Brida 17.02.2016 Konstanz Ultrafast laser Time domain : pulse train Frequency domain: comb 3 26.03.2016 Frequency comb laser Time domain : pulse train
More informationOptical Remote Sensing with Coherent Doppler Lidar
Optical Remote Sensing with Coherent Doppler Lidar Part 1: Background and Doppler Lidar Hardware Mike Hardesty 1, Sara Tucker 2, Alan Brewer 1 1 CIRES-NOAA Atmospheric Remote Sensing Group Earth System
More informationFiber Amplifiers. Fiber Lasers. 1*5 World Scientific. Niloy K nulla. University ofconnecticut, USA HONG KONG NEW JERSEY LONDON
LONDON Fiber Amplifiers Fiber Lasers Niloy K nulla University ofconnecticut, USA 1*5 World Scientific NEW JERSEY SINGAPORE BEIJING SHANGHAI HONG KONG TAIPEI CHENNAI Contents Preface v 1. Introduction 1
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 informationInvestigations on Yb-doped CW Fiber Lasers
Investigations on Yb-doped CW Fiber Lasers B.N. Upadhyaya *1, S. Kher 1, M.R. Shenoy 2, K. Thyagarajan 2, T.P.S. Nathan 1 1 Solid State Laser Division, Centre for Advanced Technology, Indore, India-452013
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 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 information