1 Institute for Optical Sciences University of Toronto Distinguished Visiting Scientist Program Prof. Michel Piché Université Laval, Québec Lecture-3: Mode-locked lasers and ultrafast fiber-based laser systems
2 Mode-locked lasers and ultrafast fibre-based laser systems Michel Piché Département de physique, COPL Université Laval, Québec Presented at the Institute for Optical Sciences, University of Toronto, on March 7, 2006
3 Outline of presentation Principles of laser mode locking Pulse characterization (P 2 parameter) Mode locking by nonlinear Kerr interactions: Kinematic mode locking Interferential mode locking («additive pulse mode locking», or «coupled-cavity mode locking») Kerr lens mode locking Mode locking by nonlinear ellipse rotation Mode-locked fibre lasers Solitonic-pulse regime Stretched-pulse regime Self-similar («parabolic») pulse regime Ultrafast fibre-based amplifier systems
4 What is mode locking? When the phases of all laser modes are equal, the laser emission is a train of pulses of minimum duration. In general, mode locking is not a natural state of laser operation. A laser must be forced to operate in the mode-locked regime. Mode locking is generally forced by either: An active modulator A saturable absorber A conversion of a nonlinear phase modulation (Kerr effect) to a nonlinear amplitude modulation A combination of some these mechanisms
5 Active mode locking L gain AM Experimental setup. cos(ω mod t) RF 100% cos(ω mod t) I(t) t 0 T mod 2T mod Laser output in time domain. q 1 q q + 1 q + 2 ω / ω mod Mode coupling in frequency domain.
6 Passive mode locking with a nonlinear element gain nonlinear element Standing-wave cavity. gain nonlinear element non-reciprocal element Traveling-wave cavity. T(I) 1 nonzero initial slope I Nonlinear transmission.
7 Active vs passive mode locking Active mode locking requires accurate cavity length control Active mode locking produces relatively long pulses (t pulse ~ Δω gain -1/2 ) Passive mode locking was first achieved with saturable absorbers (resonant nonlinearity) Saturable absorbers may also lead to Q- switching Passive mode locking can be obtained from Kerr interactions (nonresonant nonlinearities)
8 Critical issues for passively mode-locked lasers For its optimal operation, a passively mode -locked laser requires: A nonlinear loss mechanism to enable the mode-locked regime A mechanism to initiate mode-locking Dispersion management to minimize pulse chirping, hence pulse duration A pulse limiting mechanism to prevent Q- switching instabilities
9 Spatial hole burning may prohibit selfstarting operation gain E (+) I(z) E ( ) z 0 L g Interference in standing-wave cavity. gain 0 L g z Spatial modulation of gain ("spatial hole burning") E 1 λ /2 E 2 Scattering by induced g rating produc es an effective filtering See A. E. Siegman, Lasers, University Science Books, Mill Valley (1986)
10 How to initiate passive mode locking? Use of a unidirectional ring cavity (no hole burning ) Insertion of a saturable absorber with a low saturation intensity (high transmission slope) Gentle transient perturbation of a standingwave cavity to remove hole burning N.B.: Semiconductor saturable absorbers can be designed with specific characteristics. Their recovery time is generally in the picosecond range.
11 Electronic Kerr nonlinearity Nonlinear contribution to the index of refraction n = n 0 + n 2 I Instantaneous nonlinear response (< 1 fsec) The nonlinear index n 2 leads to: - spectral broadening - frequency chirp - self-focusing - rotation of the polarization ellipse
12 Frequency chirp due to Kerr effect (n 2 < 0)
13 Kinematic mode locking First observed by P. W. Smith in the 60 s. A moving mirror produced reliable mode locking of a He-Ne laser. The technique was extended to many other lasers. More recently frequency shifters (acousto-optic Bragg deflectors) have been used, particularly with fibre lasers. Such a laser operation is said to be modeless (at least, in the unlocked regime). Principle of operation: the Doppler shift due to the moving mirror is compensated by nonlinear frequency reshaping due to the Kerr effect.
14 Interferential mode locking Stolen and Mollenauer, Soliton laser (1984). Ouellette and Piché, Mode locking with a nonlinear Michelson interrferometer (1986). Groups at Cornell, MIT and St.Andrews produce femtosecond pulses with a positive-dispersion fibre in a coupled-cavity configuration (1988). It has been mostly used with color centre lasers. High sensitivity to mechanical perturbations. Principle of operation: the Kerr phase shift tunes the interferometric setup as a function of time.
15 Kerr lens mode locking First reported by Spence, Kean and Sibbett (1990). Most successful technique of passive mode locking with solid-state lasers. Shorter pulses require compensation of various orders of dispersion. Prism pairs can compensate up to second order, leading to 10-fsec pulses in Ti:sapphire lasers. Dispersive mirrors can compensate for higher-order dispersion, leading to 5-fsec pulses in Ti:sapphire lasers. Principle of operation: the Kerr lens leads to minimum losses at an aperture and/or maximum gain extraction.
16 Kerr lensing and spectral broadening Kerr medium Aperture Input beam Low intensity High intensity I I λ λ
17 Femtosecond Ti:sapphire laser Periscope Argon laser INNOVA 310 M P M la L P 2 M sa M OC 95% A Ti:sapphire crystal of 4 mm length is used. An all-solid-state laser can be used as the pump. Femtosecond emission is triggered by translating a prism.
18 Experimental results (4-mm crystal) 50.4 THz 106. nm T p = 12.8 fs Spectral density (a.u.) 41.7 THz 88.8 nm 30.4 THz 65.1 nm 21.8 THz 47.4 nm Second harmonic intensity (a.u.) T p = 16.6 fs T p = 18.2 fs T p = 22.8 fs Wavelength (nm) Delay (fs)
19 Spectrum 10-fsec pulses (2-mm crystal) Power density (a.u.) 71.1THz 147. nm Autocorrelation signal Wavelength (nm) TPA signal (a.u.) Measurement From spectrum Delay (fs)
20 Definition of a Pulse Quality Factor P 2 We do not have access directly to the real pulse shape I(t), but to its intensity autocorrelation I ac (t): I ac ()= t I( t + t ) I ()d t t It can be shown that the second-order moments of I ac (t) and I(t) are related: 2 = 2 σ t 2 σ t,ac Hence we can define a Pulse Quality Factor P 2 according to: P 2 = 2 πσ t,min σ ν where σ ν 2 is the second-order moment of the pulse spectrum and σ τ,min is the minimum value of σ t The minimum value of σ t (hence P 2 ) is found with a dispersive line of variable length
21 Pulse Quality Factor (P 2 Parameter) The pulse quality Factor (P 2 Parameter) is the temporal counterpart of the Beam Quality Factor (M 2 Parameter). The P 2 Parameter predicts the evolution of the RMS duration of a pulse in a dispersive medium (fused silica glass). Pulse rms-duration (fs) P 2 = 1.02 P 2 = 1.11 P 2 = 1.35 P 2 = 1.43 P 2 = Position from the temporal waist (cm)
22 Experimental setup Mode-locked diode laser
23 Femtosecond fibre lasers Compact and practical sources of femtosecond pulses Very low noise Pulse durations as short as 50 femtoseconds Many possible regimes of operation High average power from amplified systems (>100 W) Pulse energies > 10 μj
24 Regimes of emission of femtosecond fibre lasers 1) Solitonic-pulse regime: - negative cavity dispersion - relatively long pulses, of low power - parasitic sidebands 2) Stretched-pulse regime: - near zero or slightly positive cavity dispersion - short pulses, of intermediate power 3) Self-similar pulse regime ( parabolic pulses, or similaritons ): - near zero or slightly positive cavity dispersion - short pulses, of high power - material with negative dispersion is linear (grating pairs)
25 Stretched-pulse fiber ring laser Segments of fibre with normal and anomalous dispersion (Tamura et al., Opt. Lett., 18, 1080 (1993)) Σβ 2i L i ~ 0.01ps 2
26 Typical all-fibre ring laser cavity Dispersion-managed cavity Anomalous round-trip GVD Output fibre may lead to temporal compression & spectral broadening
27 Passive mode locking by nonlinear rotation of the polarization ellipse Cross-phase modulation due to the Kerr effect rotates the polarization ellipse as a function of instantaneous power. This interferometric process can be designed to favor high-power signals.
28 Passive mode locking by nonlinear rotation of the polarization ellipse At high power, the oscillatory response leads to pulse breakup in multiple pulses.
29 Solitonic-pulse regime: parasitic sidebands
30 Bound states of pulses (stretchedpulse regime) 1 T FWHM = 84 fs P = 7 mw [a.u.] time [ps] 1 P = 14 mw 1520 wavelength [nm] 1600 [a.u.] 0-15 time [ps] 15 1 P = 22 mw [a.u.] [a.u.] Wavelength [nm] wavelength [nm] [a.u.] Wavelength [nm] 1565 [a.u.] [a.u.] [a.u.] 0-30 time [ps] wavelength [nm]
35 Temporally-resolved pulse collision Sampled autocorrelation traces of the collision of a solitary pulse with a pulse doublet
36 Solitonic-pulse laser: bound state with a strong interaction bisoliton or antisymmetric soliton
37 Solitonic-pulse laser: bound state with a weak interaction
38 Quantization of two-soliton bound states
39 Self-similar («parabolic») pulse regime When the medium providing negative dispersion is linear, then wave breaking is inhibited. Parabolic pulses are quasi-invariant under propagation in a nonlinear material with a positive dispersion. If negative dispersion is introduced by grating pairs, then a stretched-pulse fibre laser can generate parabolic pulses of high energy (up to 10 nj has been demonstrated)
40 Laser emitting self-similar pulses (from Ilday et al, Opt. Lett. (2002) QuickTime et un décompresseur TIFF (LZW) sont requis pour visionner cette image.
41 QuickTime et un décompresseur TIFF (LZW) sont requis pour visionner cette image.
42 QuickTime et un décompresseur TIFF (LZW) sont requis pour visionner cette image.
43 QuickTime et un décompresseur TIFF (LZW) sont requis pour visionner cette image.
44 QuickTime et un décompresseur TIFF (LZW) sont requis pour visionner cette image.
48 Infrared continuum: measurements with a Fourier transform spectrometer
49 Basic considerations for ultrafast fibrebased amplifier systems Chirped pulse amplification must be used Maximum power in fibre < 3 megawatts (self-focusing threshold) Fibre amplifiers have positive dispersion (β 2 > 0) at 1 μm Fibre amplifiers have negative dispersion at 1550 nm, except when they have a very small mode area (10 μm 2 ) Large mode area amplifiers can be made single mode through an appropriate mechanical configuration If the dispersion is negative, self-modulation of the pulse takes place beyond a power threshold This instability generates a stream of temporal solitons that are Raman shifted ( soliton self-frequency shift )
50 Bandwidth limiting by the gain profile of erbium (for an Er-Yb co-doped fibre) 6,00E-08 5,00E-08 spectre de fluorescence section-efficace d'ˇmission 6,00E-25 5,00E-25 4,00E-08 3,00E-08 2,00E-08 1,00E-08 4,00E-25 3,00E-25 2,00E-25 1,00E-25 Section efficace (m^2) 0,00E+00 0,00E Longueur d'onde (nm)
51 Femtosecond fibre amplifier system (λ = 1550 nm)
52 Spectral distortion due to soliton formation and Raman shift QuickTime et un décompresseur TIFF (LZW) sont requis pour visionner cette image.
53 Gain of fibre amplifiers as a function of input power
54 Output vs input power curves for fibre amplifiers
55 Interferometric autocorrelation trace of amplified pulses
56 Conclusion Kerr-based methods are state-of-the-art for short pulse generation. Dispersion compensation is the key issue for minimum pulse duration. Scaling of pulse energy from fibre oscillators appears feasible using the self-similar pulse approach. The development of microstructured active fibres with selective dispersion will offer new opportunities for amplified systems. Detailed pulse shape from fibre systems sensitive to beam delivery. New approaches are being investigated ( cubicons ).
57 Acknowledgements Thanks to A. April, F. Babin, L. Desbiens, D. Gay, M. Laprise, B. Morasse, M. Olivier, G. Rousseau, and V. Roy This work was supported by NSERC, FCAR, CIPI, and Femtotech Thanks to EXFO for the sustained support throughout the fibre laser program Thanks to the other partners: INO, CorActive, CRC, Bomem
58 List of references M. Piché, G. Rousseau, L. Desbiens, and N. McCarthy, "Femtosecond lasers: their operation and their characterization. Application to conical wave packets". International School of Quantum Electronics, 28th Course: Laser Beams and Optics Characterization, Erice, Italy, March H. Laabs, H. Weber, Editors, pp G. Rousseau, N. McCarthy, and M. Piché, "Description of pulse propagation in a dispersive medium using a pulse quality factor". Opt. Lett. 27, (2002). M. Olivier, V. Roy, M. Piché, and F. Babin, "Pulse collisions in the stretched-pulse fiber laser". Opt. Lett. 29, (2004). V. Roy, M. Olivier, F. Babin, and M. Piché, "Dynamics of periodic pulse collisions in a strongly dissipative-dispersive system". Phys. Rev. Lett. 94, , pp. 1-4 (2005). V. Roy, M. Olivier and M. Piché, "Pulse interactions in the stretched-pulse fiber laser". Optics Express 13, (2005). M. Olivier, V. Roy, and M. Piché, "Third-order dispersion and bound states of pulses in a fiber laser". Optics Letters (March 2006).
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
Ultrafast Optical Physics II (SoSe 2017) Lecture 8, June 2 Class schedule in following weeks: June 9 (Friday): No class June 16 (Friday): Lecture 9 June 23 (Friday): Lecture 10 June 30 (Friday): Lecture
Yb-doped Mode-locked fiber laser based on NLPR 20120124 Yan YOU Mode locking method-nlpr Nonlinear polarization rotation(nlpr) : A power-dependent polarization change is converted into a power-dependent
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
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
ULTRAFAST THEORY The distinguishing aspect of femtosecond laser optics design is the need to control the phase characteristic of the optical system over the requisite wide pulse bandwidth. CVI Laser Optics
Early View publication on www.interscience.wiley.com (issue and page numbers not yet assigned; citable using Digital Object Identifier DOI) Laser Phys. Lett. 1 5 () / DOI./lapl.9 1 Abstract: Experimental
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
Designing for Femtosecond Pulses White Paper PN 200-1100-00 Revision 1.1 July 2013 Calmar Laser, Inc www.calmarlaser.com Overview Calmar s femtosecond laser sources are passively mode-locked fiber lasers.
Pulse breaking recovery in fiber lasers L. M. Zhao 1,, D. Y. Tang 1 *, H. Y. Tam 3, and C. Lu 1 School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798 Department
Characterization of Chirped volume bragg grating (CVBG) Sobhy Kholaif September 7, 017 1 Laser pulses Ultrashort laser pulses have extremely short pulse duration. When the pulse duration is less than picoseconds
Femtosecond pulse generation Marc Hanna Laboratoire Charles Fabry Institut d Optique, CNRS, Université Paris-Saclay Outline Introduction 1 Fundamentals of modelocking 2 Femtosecond oscillator technology
High Power and Energy Femtosecond Lasers PHAROS is a single-unit integrated femtosecond laser system combining millijoule pulse energies and high average powers. PHAROS features a mechanical and optical
Lu et al. Vol. 20, No. 7/July 2003 / J. Opt. Soc. Am. B 1473 Soliton stability conditions in actively modelocked inhomogeneously broadened lasers Wei Lu,* Li Yan, and Curtis R. Menyuk Department of Computer
28 J. Opt. Soc. Am. B/Vol. 17, No. 1/January 2000 Man et al. Mechanism of intrinsic wavelength tuning and sideband asymmetry in a passively mode-locked soliton fiber ring laser W. S. Man, H. Y. Tam, and
Controllable harmonic mode locking and multiple pulsing in a Ti:sapphire laser Xiaohong Han, Jian Wu, and Heping Zeng* State Key Laboratory of Precision Spectroscopy, and Department of Physics, East China
This article was downloaded by: [University of California, Irvine] On: 24 April 2011 Access details: Access Details: [subscription number 923037147] Publisher Taylor & Francis Informa Ltd Registered in
Spatial distribution clamping of discrete spatial solitons due to three photon absorption in AlGaAs waveguide arrays Darren D. Hudson 1,2, J. Nathan Kutz 3, Thomas R. Schibli 1,2, Demetrios N. Christodoulides
Simultaneous pulse amplification and compression in all-fiber-integrated pre-chirped large-mode-area Er-doped fiber amplifier Gong-Ru Lin 1 *, Ying-Tsung Lin, and Chao-Kuei Lee 2 1 Graduate Institute of
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
High-Power Femtosecond Lasers PHAROS is a single-unit integrated femtosecond laser system combining millijoule pulse energies and high average power. PHAROS features a mechanical and optical design optimized
High-Power, Passively Q-switched Microlaser - Power Amplifier System Yelena Isyanova Q-Peak, Inc.,135 South Road, Bedford, MA 01730 firstname.lastname@example.org Jeff G. Manni JGM Associates, 6 New England Executive
Spectral Phase Modulation and chirped pulse amplification in High Gain Harmonic Generation Z. Wu, H. Loos, Y. Shen, B. Sheehy, E. D. Johnson, S. Krinsky, J. B. Murphy, T. Shaftan,, X.-J. Wang, L. H. Yu,
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
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
MULTI-STAGE YTTERBIUM FIBER-AMPLIFIER SEEDED BY A GAIN-SWITCHED LASER DIODE Authors: M. Ryser, S. Pilz, A. Burn, V. Romano DOI: 10.12684/alt.1.101 Corresponding author: e-mail: M. Ryser email@example.com
taccor Turn-key GHz femtosecond laser Self-locking and maintaining Stable and robust True hands off turn-key system Wavelength tunable Integrated pump laser Overview The taccor is a unique turn-key femtosecond
IEEE JOURNAL OF QUANTUM ELECTRONICS, VOL. 38, NO. 10, OCTOBER 2002 1317 Dispersion Effects in an Actively Mode-Locked Inhomogeneously Broadened Laser Wei Lu, Li Yan, Member, IEEE, and Curtis R. Menyuk,
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
SOLITON DYNAMICS IN THE MULTIPHOTON PLASMA REGIME Chad A. Husko,, Sylvain Combrié, Pierre Colman, Jiangjun Zheng, Alfredo De Rossi, Chee Wei Wong, Optical Nanostructures Laboratory, Columbia University
I March 1995 OPTICS COMMUNICATIONS ELSEVlER Optics Communications 115 (1995) 105-109 Time resolved spectral development of ultrashort pulse solitons in erbium fiber loop lasers D.U. Noske, N. Pandit, J.R.
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
Soliton-Similariton Fibre Laser Bulent Oktem 1, Coşkun Ülgüdür 2 and F. Ömer Ilday 2 SUPPLEMENTARY INFORMATION 1 Graduate Program of Materials Science and Nanotechnology, Bilkent University, 06800, Ankara,
This document is downloaded from DR-NTU, Nanyang Technological University Library, Singapore. Title 80GHz dark soliton fiber laser Author(s) Citation Song, Y. F.; Guo, J.; Zhao, L. M.; Shen, D. Y.; Tang,
TIGER Femtosecond and Picosecond Ti:Sapphire Lasers Customized systems with SESAM technology* www.lumentum.com Data Sheet The TIGER femtosecond and picosecond lasers combine soliton mode-locking, a balance
Pulse stretching and compressing using grating pairs A White Paper Prof. Dr. Clara Saraceno Photonics and Ultrafast Laser Science Publication Version: 1.0, January, 2017-1 - Table of Contents Dispersion
Characteristics of point-focus Simultaneous Spatial and temporal Focusing (SSTF) as a two-photon excited fluorescence microscopy Qiyuan Song (M2) and Aoi Nakamura (B4) Abstracts: We theoretically and experimentally
Optical spectra beyond the amplifier bandwidth limitation in dispersion-managed mode-locked fiber lasers Souad Chouli, 1,* José M. Soto-Crespo, and Philippe Grelu 1 1 Laboratoire Interdisciplinaire Carnot
Ultrafast second-stokes diamond Raman laser Michelle Murtagh, 1,2 Jipeng Lin, 1 Johanna Trägårdh, 2 Gail McConnell 2 and David J. Spence 1,* 1 MQ Photonics, Department of Physics and Astronomy, Macquarie
External-Cavity Tapered Semiconductor Ring Lasers Frank Demaria Laser operation of a tapered semiconductor amplifier in a ring-oscillator configuration is presented. In first experiments, 1.75 W time-average
Testing with Femtosecond Pulses White Paper PN 200-0200-00 Revision 1.3 January 2009 Calmar Laser, Inc www.calmarlaser.com Overview Calmar s femtosecond laser sources are passively mode-locked fiber lasers.
GRENOUILLE Measuring ultrashort laser pulses the shortest events ever created has always been a challenge. For many years, it was possible to create ultrashort pulses, but not to measure them. Techniques
Theoretical Approach Why do we need ultra short technology?? INTRODUCTION: Generating ultrashort laser pulses that last a few femtoseconds is a highly active area of research that is finding applications
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
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,
R. J. Jones College of Optical Sciences OPTI 511L Fall 2017 Active Modelocking of a Helium-Neon Laser The generation of short optical pulses is important for a wide variety of applications, from time-resolved
High energy femtosecond OPA pumped by 1030 nm Nd:KGW laser. V. Kozich 1, A. Moguilevski, and K. Heyne Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany Abstract
PICOSECOND AND FEMTOSECOND Ti:SAPPHIRE LASERS Patrick Georges, Thierry Lépine, Gérard Roger, Alain Brun To cite this version: Patrick Georges, Thierry Lépine, Gérard Roger, Alain Brun. PICOSECOND AND FEMTOSEC-
Multi-kilowatt, all-fiber integrated chirped-pulse amplification system yielding 4 pulse compression using air-core fiber and conventional erbium-doped fiber amplifier C. J. S. de Matos and J. R. Taylor
Switching among pulse-generation regimes in passively mode-locked fibre laser by adaptive filtering Junsong Peng, Sonia Boscolo Aston Institute of Photonic Technologies, School of Engineering and Applied
Extremely simple device for measuring 1.5-µm ultrashort laser pulses Selcuk Akturk, Mark Kimmel, and Rick Trebino School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332-0430, USA firstname.lastname@example.org
Supercontinuum and four-wave mixing with Q-switched pulses in endlessly single-mode photonic crystal fibres W. J. Wadsworth, N. Joly, J. C. Knight, T. A. Birks, F. Biancalana, P. St. J. Russell Optoelectronics
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.
Regenerative Amplification in Alexandrite of Pulses from Specialized Oscillators In a variety of laser sources capable of reaching high energy levels, the pulse generation and the pulse amplification are
SPIE Paper Number: 8601-117 SPIE Photonics West 2013 2-7 February 2013 San Francisco, California, USA 156 micro-j ultrafast Thulium-doped fiber laser Peng Wan*, Lih-Mei Yang and Jian Liu PolarOnyx Inc.,
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...
Introduction The Electric field of a monochromatic plane wave is given by is the angular frequency of the plane wave. The plot of this function is given by a cosine function as shown in the following graph.
Generation mode-locked square-wave pulse based on reverse saturable absorption effect in graded index multimode fiber Zhipeng Dong, Shu jie Li, Jiaqiang Lin, Hongxun Li, Runxia Tao, Chun Gu, Peijun Yao,
Optical phase-coherent link between an optical atomic clock and 1550 nm mode-locked lasers Kevin W. Holman, David J. Jones, Steven T. Cundiff, and Jun Ye* JILA, National Institute of Standards and Technology
External cavities for controling spatial and spectral properties of SC lasers. J.P. Huignard TH-TRT Bright Er - Partners. WP 3 : External cavities approaches for high brightness. - RISOE TUD Dk - Institut
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
Propagation, Dispersion and Measurement of sub-10 fs Pulses Table of Contents 1. Theory 2. Pulse propagation through various materials o Calculating the index of refraction Glass materials Air Index of
PERFORMANCE OF PHOTODIGM S DBR SEMICONDUCTOR LASERS FOR PICOSECOND AND NANOSECOND PULSING APPLICATIONS By Jason O Daniel, Ph.D. TABLE OF CONTENTS 1. Introduction...1 2. Pulse Measurements for Pulse Widths
Sub-300 fs, 0.5 mj pulse at 1kHz from Ho:YLF amplifier and Kagome pulse compression K. Murari 1,2,3, H. Cankaya 1,2, B. Debord 5, P. Li 1, G. Cirmi 1,2, G. M. Rossi 1,2, S. Fang 1,2, O. D. Mücke 1,2, P.
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
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,
ALL-FIBER PASSIVELY MODE-LOCKED FEMTOSECOND FIBER LASERS by Jiaqi Zhou B. Eng. (2009), M. Eng. (2012), Fudan University, CHINA A dissertation presented to Ryerson University in partial fulfillment of the
High Power Femtosecond Fiber Chirped Pulse Amplification System for High Speed Micromachining Lawrence SHAH and Martin E. FERMANN IMRA America, Inc., 1044 Woodridge Avenue, Ann Arbor, Michigan, USA, 48105
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, VOL. 2, NO. 3, SEPTEMBER 1996 435 Semiconductor Saturable Absorber Mirrors (SESAM s) for Femtosecond to Nanosecond Pulse Generation in Solid-State
International Journal of Electronics and Communication Engineering (IJECE) ISSN(P): 78-991; ISSN(E): 78-991X Vol. 4, Issue 6, Oct - Nov 15, 9-16 IASE SUDY OF CHIRPED PULSE COMPRESSION IN OPICAL FIBER FOR
Generation of High-order Group-velocity-locked Vector Solitons X. X. Jin, Z. C. Wu, Q. Zhang, L. Li, D. Y. Tang, D. Y. Shen, S. N. Fu, D. M. Liu, and L. M. Zhao, * Jiangsu Key Laboratory of Advanced Laser
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
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
pulsecheck The Modular Autocorrelator Pulse Measurement Perfection with the Multitalent from APE It is good to have plenty of options at hand. Suitable for the characterization of virtually any ultrafast
Faraday Rotators and I. Introduction The negative effects of optical feedback on laser oscillators and laser diodes have long been known. Problems include frequency instability, relaxation oscillations,
TIME-PRESERVING MONOCHROMATORS FOR ULTRASHORT EXTREME-ULTRAVIOLET PULSES Luca Poletto CNR - Institute of Photonics and Nanotechnologies Laboratory for UV and X-Ray Optical Research Padova, Italy e-mail:
Development of near and mid-ir ultrashort pulse laser systems at Q-Peak Evgueni Slobodtchikov Q-Peak, Inc. Outline Motivation In search of Ti:Sapphire of infrared Yb:doped laser crystals Mid-IR laser crystals
Optical solitons in a silicon waveguide Jidong Zhang 1, Qiang Lin 2, Giovanni Piredda 2, Robert W. Boyd 2, Govind P. Agrawal 2, and Philippe M. Fauchet 1,2 1 Department of Electrical and Computer Engineering,
JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 16, NO. 11, NOVEMBER 1998 1953 A Femtosecond Code-Division Multiple-Access Communication System Test Bed H. P. Sardesai, C.-C. Chang, and A. M. Weiner Abstract This