Download or read book Development and Characterisation of a Near infrared Femtosecond Optical Parametric Oscillator Frequency Comb written by Teresa I. Ferreiro and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Temporal and Spectral Characterization of Near IR Femtosecond Optical Parametric Oscillator Pulses written by Parisa Farzam and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Femtosecond Optical Parametric Oscillator Frequency Combs for Coherent Pulse Synthesis written by Richard A. McCracken and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sub harmonic Generation of Frequency Combs for Spectroscopy and Quantum Optics written by Alireza Marandi and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Extensive development of optical frequency combs, broadband coherent light sources with equidistant narrow spectral lines, in the near-infrared and visible has provided numerous opportunities in many fields, including frequency metrology, astronomy, attosecond sciences, and spectroscopy. The quest for extension of frequency comb techniques to the mid-infrared -- the molecular fingerprint spectral region -- continues with the promise of significant improvements in various applications related to molecular spectroscopy. This dissertation presents the results of a novel method for producing broadband mid-infrared frequency combs through sub-harmonic generation from commercially available near-infrared sources. Sub-harmonic generation occurs in a degenerate optical parametric oscillator (OPO) with salient features of (i) simplicity of the setup, (ii) low (100 mW) pump power requirement, (iii) potential for high ( 90%) conversion eciency and (vi) intrinsic phase and frequency locking to the pump. The resulting mid-infrared frequency comb is then broadened through supercontinuum generation by in-situ tapering of a chalcogenide fiber to cover the spectral range from 2.2 to 5 microns, desirable for molecular spectroscopy. Apart from its effectiveness in extension of the existing near-infrared frequency combs to the mid-infrared, sub-harmonic generation paves the way for quantum optical experiments in the frequency comb regime, because of the intriguing quantum behavior of OPOs at degeneracy. The coherence properties of such a frequency comb OPO are discussed, and the results of a novel all-optical post-precessing-free quantum random number generator are presented.
Download or read book Femtosecond Optical Frequency Comb Principle Operation and Applications written by Jun Ye and published by Springer Science & Business Media. This book was released on 2006-06-15 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last few years, there has been a convergence between the fields of ultrafast science, nonlinear optics, optical frequency metrology, and precision laser spectroscopy. These fields have been developing largely independently since the birth of the laser, reaching remarkable levels of performance. On the ultrafast frontier, pulses of only a few cycles long have been produced, while in optical spectroscopy, the precision and resolution have reached one part in Although these two achievements appear to be completely disconnected, advances in nonlinear optics provided the essential link between them. The resulting convergence has enabled unprecedented advances in the control of the electric field of the pulses produced by femtosecond mode-locked lasers. The corresponding spectrum consists of a comb of sharp spectral lines with well-defined frequencies. These new techniques and capabilities are generally known as “femtosecond comb technology. ” They have had dramatic impact on the diverse fields of precision measurement and extreme nonlinear optical physics. The historical background for these developments is provided in the Foreword by two of the pioneers of laser spectroscopy, John Hall and Theodor Hänsch. Indeed the developments described in this book were foreshadowed by Hänsch’s early work in the 1970s when he used picosecond pulses to demonstrate the connection between the time and frequency domains in laser spectroscopy. This work complemented the advances in precision laser stabilization developed by Hall.
Download or read book Pulse Formation and Frequency Conversion in Dispersion engineered Nonlinear Waveguides and Resonators written by Marc P Jankowski and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent advances in nonlinear photonics have enabled a new class of broadband ultra-stable light sources known as optical frequency combs. These light sources have given rise to an array of new optical devices and systems, spanning applications such as spectroscopy, astronomy, remote sensing, frequency synthesis, attoscience, telecommunications, and optical clockwork. At this time, there are a number of unsolved problems within the field. Optical frequency combs are often constrained to wavelengths within the near-infrared (NIR) due to the limited variety of in mature laser gain media and host glasses, and many applications such as spectroscopy, sensing, and attoscience would benefit from the development of optical frequency combs at longer wavelength ranges such as the mid-infrared (MIR). Furthermore, the generation and stabilization of frequency combs often requires rather complicated nonlinear optical systems, which have prevented these light sources from being used outside of dedicated optics labs. This dissertation considers new approaches to frequency comb generation based on recently discovered nonlinear dynamical processes that occur in quasi-phasematched (QPM) devices with quadratic nonlinearities. A recurring theme is that the interplay of nonlinear optical effects, such as optical parametric amplification and self-phase modulation, with linear optical effects, such as dispersion, can produce qualitatively new dynamical regimes. In many cases, these dynamical regimes exhibit favorable features that potentially solve the problems discussed above. The first half of this thesis considers the pulse formation mechanisms present in optical parametric oscillators (OPOs), and discusses new operating regimes that enable the generation of MIR combs with substantially more bandwidth than the NIR comb used to drive the OPO. These devices can produce few-cycle pulses with conversion efficiencies exceeding 50% while also preserving the coherence of the frequency comb. The latter portion of this thesis studies the dynamics of femtosecond pulses in nanophotonic waveguides. Here, the geometric dispersion associated with sub-wavelength confinement be used to achieve long interaction lengths with femtosecond pulses. Using these effects we are able to achieve saturated SHG with femtojoules of pulse energy, where state-of-the-art devices previously used picojoules. In the limit of phase-mismatched SHG driven with picojoules of pulse energy we observe the formation of a coherent multi-octave supercontinuum comprised of multiple spectrally broadened harmonics. The mechanisms of spectral broadening in this system are shown to be completely unique to dispersion-engineered nanophotonic QPM devices and exhibit a number of desirable features including i) low power requirements, ii) fewer decoherence mechanisms than traditional approaches, and iii) the formation of carrier-envelope-offset beatnotes in the regions of spectral overlap between the harmonics.
Download or read book Versatile Femtosecond Optical Parametric Oscillator Frequency Combs for Metrology written by Karolis Balskus and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Femtosecond Optical Parametric Oscillators in the Mid infrared written by Zoe E. Penman and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Femtosecond Optical Parametric Oscillators for the Mid infrared written by Cathrine McGowan and published by . This book was released on 1998 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Femtosecond Optical Parametric Oscillator Near 3 Microns written by and published by . This book was released on 1994 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: An optical parametric oscillator operating at fundamental molecular vibrational frequencies is demonstrated. The 100 femtosecond pulses make possible coherent measurements in a new spectroscopic region.
Download or read book DEPSCOR 95 Development of Nonlinear Optical Materials for Optical Parametric Oscillator and Frequency Conversion Applications in the Near and Mid Infrared written by and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Point defects and their associated optical absorption bands often limit the performance of tunable laser sources (i.e., optical parametric oscillators) operating in the near and mid-infrared. Near-edge absorption in ZnGeP2 crystals and gray tracks in KTP crystals are examples of device limiting phenomena in commercially available materials, and both of these effects result from uncontrolled point defects introduced into the crystals during growth. This project identified and characterized the dominant defects in these materials. The experimental techniques employed were electron paramagnetic resonance (EPR), electron-nuclear double resonance (ENDOR) photoluminescence (PL), optical absorption, and Hall measurements. Information obtained from these studies is published and has been provided to our industrial partners where crystal growth procedures were modified in order to minimize the particular defects being identified in our spectroscopic studies. Our industrial partners were Sanders (a Lockheed Martin Company) in Nashua, NH. and Crystal Associates, Inc. in East Hanover, NJ. Specific studies included: platinum-, silicon-, and titanium-associated traps in KTP; the zinc vacancy and cation-antisite defects in ZnGeP2; and Hall measurements of CdGeAs2.
Download or read book Mid infrared Femtosecond Optical Parametric Oscillators and Their Application to the Study of Ultrafast Hole Dynamics in GaAs written by Kent Charles Burr and published by . This book was released on 1999 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Novel Femtosecond Optical Parametric Oscillators in the Infrared written by Callum Francis O'Donnell and published by . This book was released on 2019 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Frequency Comb Generation in a Pump Enhanced Optical Parametric Oscillator written by Michael B. Spurr and published by . This book was released on 2005 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Noncritically Phase Matched Femtosecond Optical Parametric Oscillator Near 3 Microns written by and published by . This book was released on 1994 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: An optical parametric oscillator designed for the 3[mu]m spectral region is described. Pulses shorter than 100 fs are produced. Alignment is simple and conversion efficiency is good.
Download or read book Synchronously Pumped Optical Parametric Oscillators in the Mid infrared and Their Use in Semiconductor Characterisation written by P. Jonathan Phillips and published by . This book was released on 2002 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Pulse Energy Near infrared Ultrafast Optical Parametric Oscillators written by Tobias Paul Lamour and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A source-demand in the near- and mid-IR wavelength spectrum exists for various applications such as waveguide inscription, multiphoton imaging, and nonlinear spectroscopy. All of the applications seek for higher repetitions rates for faster processing speed, better signal to noise ratios or to improve the results for applications like laser waveguide inscription. This is in contrast to the high pulse energies, required to drive the nonlinear processes involved with these applications. Available systems are either based on low-energy, high-repetition-rate optical parametric oscillators or high-energy, low-repetition-rate optical parametric amplifiers. In this thesis a sources was developed that can bridge the wide gap between these two extremes, providing sufficient energy to drive nonlinear processes, with repetition rates in the MHz domain. This was achieved by introducing three techniques previously employed for energy scaling in laser cavities. Firstly an exchange from the conventionally used Ti:sapphire pump to a commercial high power Yb:fibre laser system readily scaled the usable pump energy. This was combined with a technique known as cavity-length extension, which allows a lowering of the cavity roundtrip time offering the build-up of pulses with increased energy. In a final stage, cavity-dumping on basis of an acousto-optic modulator was introduced into the a redesigned cavity. The combination of these three techniques, novel to synchronously pumped optical parametric oscillators, enabled the extraction of record-high pulse energies and peak powers.
