Download or read book Mid infrared Pulse Generation Via Orientation Patterned Gallium Arsenide Parametric Devices written by Qiang Fu and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cascaded Orientation patterned Gallium Arsenide Optical Parametric Oscillator for Improved Longwave Infrared Conversion Efficiency written by Ryan K. Feaver and published by . This book was released on 2017 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical parametric oscillators (OPOs) utilizing quasi-phase matched materials offer an appealing alternative to direct laser sources. Quasi-phase matched materials provide a useful alternative to traditional birefringent nonlinear optical materials and through material engineering, higher nonlinear coefficients can now be accessed. Orientation patterned gallium arsenide (OPGaAs) is an ideal material because of its broad IR transmission and large nonlinear coefficient. In contrast to ferroelectric materials, such as lithium niobate, where the pattern is fabricated through electric poling, zincblende materials, like OPGaAs, are grown epitaxially with the designed pattern. Generating longwave output from a much shorter pump wavelength, however, is relatively inefficiency due to the large quantum defect when compared to similar devices operating in the 3-5 μm regime. One method to increase pump to idler conversion efficiency is to recycle the undesired and higher energy signal photons into additional idler photons via a second nonlinear stage. An external amplifier stage can be utilized, where the signal and idler from the OPO are sent to a second nonlinear crystal in which the idler is amplified at the expense of the signal. Alternatively, the second crystal can be placed within the original OPO cavity where the signal from the first-stage acts as the pump for the second crystal and the resonant intensity of the signal is higher. Pumping the second crystal within the OPO should lead to higher conversion efficiency into the longwave idler. The grating period needed for the second crystal to use the signal from the first crystal to produce additional idler has the fortuitous advantage that it will not phase match to the original pump wavelength, avoiding unwanted nonlinear interactions. Therefore, a simple linear cavity can be utilized where the pump from the first-stage will simply propagate through the second crystal without undesired results. Without this feature, the pump would need to be coupled out of the cavity before it enters the second crystal. Initial numerical simulations using a custom model, implemented in MATLAB® for the proposed linear, two-stage, cascaded, OPGaAs nanosecond OPO suggest a significant improvement in conversion efficiency over a single-stage device can be obtained. The numerical model includes diffraction, crystal loss, phase mismatch, pump depletion, and back conversion, it assumes monochromatic waves and neglects group velocity dispersion. For a singly resonant oscillator (SRO) pumped by a 2.052 μm Tm:Ho,YLF laser with 45 ns pulse width, the addition of the second crystal in the cavity increases idler generation by a factor of two and exceeds the quantum defect limit. Experimentally, the cascaded OPGaAs OPO demonstrated a ~3% slope efficiency. Limited output may be the result of improper phase matching, given that two distinct idlers wavelengths were observed. Tuning the OPGaAs crystals to generate identical idlers should improve efficiency. The linewidth of the signal serving to pump the second-stage likely reduced efficiency as well. To our knowledge, this is the first cascaded OPO using OPGaAs, and the first cascaded OPO operating in the longwave infrared where the same longwave idler was generated in the both crystals.
Download or read book Thick Film Orientation patterned Gallium Arsenide for Nonlinear Optical Frequency Conversion written by Paulina Susan Kuo and published by . This book was released on 2008 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mid infrared Optoelectronics written by Eric Tournié and published by Woodhead Publishing. This book was released on 2019-10-19 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mid-infrared Optoelectronics: Materials, Devices, and Applications addresses the new materials, devices and applications that have emerged over the last decade, along with exciting areas of research. Sections cover fundamentals, light sources, photodetectors, new approaches, and the application of mid-IR devices, with sections discussing LEDs, laser diodes, and quantum cascade lasers, mid-infrared optoelectronics, emerging research areas, dilute bismide and nitride alloys, Group-IV materials, gallium nitride heterostructures, and new nonlinear materials. Finally, the most relevant applications of mid-infrared devices are reviewed in industry, gas sensing, spectroscopy, and imaging. This book presents a key reference for materials scientists, engineers and professionals working in R&D in the area of semiconductors and optoelectronics. - Provides a comprehensive overview of mid-infrared photodetectors and light sources and the latest materials and devices - Reviews emerging areas of research in the field of mid-infrared optoelectronics, including new materials, such as wide bandgap materials, chalcogenides and new approaches, like heterogeneous integration - Includes information on the most relevant applications in industry, like gas sensing, spectroscopy and imaging
Download or read book Orientation patterned Gallium Arsenide for Quasi phasematched Infrared Nonlinear Optics written by Thierry Jacques Pinguet and published by . This book was released on 2002 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Crystal Nonlinear Optics written by Arlee Smith and published by . This book was released on 2018-02-21 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced textbook on crystal nonlinear optics.
Download or read book Mid Infrared Coherent Sources and Applications written by Majid Ebrahim-Zadeh and published by Springer Science & Business Media. This book was released on 2008-01-02 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering fundamental principles and the state of the art, this is a collection of reviews from experts in mid-infrared (mid-IR) coherent sources. Among the sources covered are optical parametric oscillators, difference frequency generators, and the most recent broadband crystalline, quantum cascade, and fiber lasers. The authors show how advances in mid-IR science and technology make these sources indispensable for a variety of applications.
Download or read book Development of a TM HO YLF laser pumped Orientation patterned Gallium Arsenide Optical Parametric Oscillator written by Michael D. Harm and published by . This book was released on 2002 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diffusion bonded stacked Gallium Arsenide for Mid infrared Generation written by Leslie Ann Gordon and published by . This book was released on 2000 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Broadband Optical Sources Based on Highly Nonlinear Quasi phasematched Interactions written by Christopher Richard Phillips and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Quasi-phasematching (QPM) is a powerful and versatile technique for manipulating coherent radiation. With current QPM media, we can perform a number of functionalities, including generating, amplifying, or spectrally broadening light across a wide range of frequencies. An advantage of QPM is that it allows us to engineer very strong nonlinear interactions with available commercial lasers. However, devices involving such strong nonlinearities can exhibit a number of subtle effects, necessitating careful numerical and theoretical modeling. In this dissertation, we consider a number of different applications of QPM, all of which share this common theme. First, we consider supercontinuum (SC) generation in quasi-phasematching waveguides, an approach which has several potential advantages including relatively low energy requirements (compared to those required in bulk), automatic carrier envelope offset frequency detection, the potential to engineer the QPM grating profile to produce a tailored output spectrum, and the use of mid-IR QPM media. We first study SC generation in reverse-proton-exchanged (RPE) lithium niobate waveguides numerically, showing good agreement between simulations and existing experimental results. Our model reveals a strong competition between second- and third-order nonlinear effects, significantly greater than previously assumed for lithium niobate, which led to almost an order-of-magnitude increase in SC generation energy requirements and in some cases degraded coherence properties. We performed SC generation experiments in QPM RPE waveguides using a Tm-doped fiber laser system. These experiments yielded a multiple-octave-spanning spectrum, and facilitated self-referencing of the laser directly from the waveguide. We modeled the experiments numerically, showing good agreement between simulated and measured spectra. Next, in order to resolve the competition between second- and third-order nonlinear effects and several other limitations of RPE waveguides, we studied dispersion-engineered lithium niobate ridge waveguides for the purpose of obtaining group velocity matching between the first and second harmonic pulses. We showed numerically that when properly designed, these ridge waveguides can facilitate SC generation with pump energies of around 50 pJ, around 50 times lower than in RPE waveguides. There is also significant interest in generating tunable, high-spectral-density frequency combs in the mid-IR for spectroscopic applications. To accomplish this goal, we demonstrated tunable mid-IR generation based on difference frequency generation (DFG) in orientation patterned gallium arsenide (OP-GaAs). The OP-GaAs sample had a fan-out QPM design, facilitating smooth tuning across the mid-IR from 6.7-12.7 microns. The DFG system was based on a Tm-doped fiber laser producing 150-fs pulses at 1950-nm, and utilized the Raman soliton self frequency shift in a fluoride fiber to obtain a power-tunable 2500-nm seed for the DFG process. Average powers of up to 1.3 mW were obtained. We investigated the limitations of this approach theoretically and numerically, and showed that with realistic upgrades to the pump laser, high-gain optical parametric amplification (OPA) and high overall conversion efficiency can be obtained. This would allow for the generation of powers exceeding of as much as 100 mW, with a power spectral density sufficient for spectroscopic applications. The last topic discussed in this dissertation is optical parametric chirped pulse amplification (OPCPA). There is significant interest in generating high-intensity, few-cycle pulses in the mid-IR for high-harmonic generation. However, there are few laser systems with the required properties beyond 3000 nm, which motivates the use of existing near-IR laser sources and nonlinear optics to generate and amplify light in this spectral region. Due to dispersion, amplification of few-cycle pulses is challenging unless one of several approaches is taken in order to facilitate broadband gain. Our approach is to utilize chirped (aperiodic) QPM gratings, in which the grating k-vector is varied monotonically through the length of the device. With these devices, the grating bandwidth can exceed the phasematching bandwidth of the input pulses, thereby allowing for ultra-broadband amplification. We first study the properties of this type of OPA device, showing a number of interesting physical properties including adiabatic following solutions to the nonlinear three-wave mixing equations. We then give an overview of our OPCPA experimental results, demonstrating 7 microjoule, 75-fs pulses centered at 3400-nm, with a repetition rate of 100 kHz. With chirped QPM OPA devices, high-gain, broad-bandwidth amplification, and tailored spectral gain and phase profiles can be achieved. Furthermore, these devices enable a number of system-level improvements. For example, we achieve highly efficient pulse compression by sending the amplified mid-IR pulses through low-loss, anti-reflection-coated bulk silicon. Spectral phase not corrected by the silicon can be compensated by pre-distorting the 1560-nm seed laser with a pulse shaper. This approach is possible because the seed phase is parametrically transferred to the mid-IR pulses by the broadband, collinear pre-amplifier. Finally, we discuss in detail the design opportunities and constraints which arise when deploying chirped QPM gratings in OPCPA systems. The main system constraints are on the duration and peak power of the pump pulses. We show that recent upgrades to the pump laser allowed these constraints to be met. The compressed idler pulses were able to ionize xenon, indicating the system is now adequate for use in high-field experiments.
Download or read book Single cycle Mid infrared Pulse Generation Via Nonlinear Optics written by Bo-Han Chen and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low Loss Orientation patterned Gallium Arsenide OPGaAs Waveguides for Nonlinear Infrared Frequency Conversion written by Izaak Vincent Kemp and published by . This book was released on 2012 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of High Average Power Nonlinear Frequency Conversion Devices written by and published by . This book was released on 2002 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This program developed microstructured nonlinear optical materials and quasi-phasematched devices based on those materials. The two material systems investigated, periodically-poled ferroelectrics, especially lithium niobate (PPLN), and orientation-patterned GaAs (OP-GaAs) enable nonlinear interactions impossible in conventional nonlinear media. This work included the generation of the shortest blue light pulse then reported (5,4 fs), demonstration of orientation patterned GaAs (OP-GaAs), a mid-IR analog for PPLN operating to wavelengths> 12 micrometers with 10 times larger nonlinear figure of merit than PPLN, vapor transport synthesis of stoichiometric lithium tantalate (with no measurable room-temperature photorefractive damage), chirped-pulse parametric amplifiers generating millijoule ultrafast pulses in a simple single-pass configuration, guided-wave frequency mixers with efficiencies of 3000%/W, enabling demonstration of extreme phenomena such as 99% pump depleted SHG (with only 900 mW pump power), and optical parametric generators with 300 pJ thresholds. Significant projects seeded by the work in this program have been spun off as industry-supported projects. In particular optical signal processing devices for communications based on the waveguide mixers, and IRCM applications of the OP-GaAs.
Download or read book Femtosecond Infrared Pulse Generation Using Optical Parametric Techniques and Application to Time resolved Spectroscopy of Geranium written by Gary Mak and published by . This book was released on 1994 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optics Letters written by and published by . This book was released on 2008 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation Into Mid infrared Pulse Shaping Using an Optical Parametric Oscillator written by Naveed A. Naz and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis reports experimental indirect spectral transfer of shaped pulses from the near to mid-infrared via the use of an optical parametric oscillator. It was shown that good spectral fidelity of transfer can be achieved by making suitable adjustments to the OPO. The issues affecting the transfer process are discussed and experimental results are compared with existing theory. The shaping of the nearinfrared pulses was performed using a zero dispersion pulse shaper and a computer controlled spatial light modulator. A suitable search algorithm was written and, with the use of appropriate computer hardware, allowed a closed-feedback loop to be implemented. The computer controlled hardware was demonstrated to be able to autonomously optimise simple experiments in the mid-infrared and optimise the threshold of an optical parametric oscillator.
Download or read book Tunable Laser Applications written by F.J. Duarte and published by CRC Press. This book was released on 2008-08-26 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tunability has added an important dimension to a variety of laser devices and led to new systems and applications. From laser spectroscopy to Bose-Einstein condensation, the one nexus is the tunable laser. Incorporating nine new chapters since the first edition, Tunable Laser Applications, Second Edition reflects the significant developments
