Download or read book Parametric Infrared Generation written by Vincent Kemlin and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation deals with the generation of parametric light in the range 1 to 12 μm. Parametric infrared generation turns out to be a challenge at the interface between the fields of nonlinear optics and materials science embodied by the two approaches used to achieve efficient frequency conversion. Birefringent Phase-Matching (BPM) in anisotropic materials has been the traditional solution used in most frequency converter devices. But since the 90's, the quick success of microstructured materials has paved the way for Quasi-Phase-Matching (QPM) even in isotropic materials, leading to a renewed interest in Optical Parametric Oscillators (OPO). The high degree of engineering offered by this technology is now widely recognized as a key competitive advantage. We obtained original results concerning parametric infrared generation using BPM as well as QPM.We have built the first OPO pumped by a 1.064 μm Nd:YAG laser and based on a 5-mm-thick crystal of 5%MgO:PPLN cut as a partial cylinder. This OPO combines a wide and continuous tunability over the range 1.4 μm - 4.4 μm with a good conversion efficiency, up to 30%. Despite the need to resort to pump intensities almost an order of magnitude higher than in a slab OPO, we have shown that the energetical performance of a partial cylinder OPO is now equivalent to that of a slab OPO besides a wider tunability that can be continuously addressed. When the same Nd:YAG laser pumps two such independent OPOs in parallel, we dispose of a highly versatile QPM dual wavelength source with two widely and independently tunable beams. We have built this unique source allowing versatile Difference Frequency Generation (DFG) towards the mid- and far- infrared. We carried out the first BPM DFG experiments with this source in a CdSe slab oriented for angular noncritical phase-matching at two different pump wavelengths, respectively 2.72 μm and 2.79 μm. The second set of DFG experiments were performed in a CdSe crystal cut and polished as a 5-mm-diameter full cylinder. Using a pump wavelength of 2.79 μm, we were able to tune the DFG wavelength from 8.3 μm up to 10.3 μm by rotating the crystal over an angular range of 18°. Contrary to all the BPM DFG experiments reported so far in the single crystal CdSe, tuning was achieved while keeping normal incidence of both the incident and generated beams in the crystal. The implementation of spectral narrowing techniques is already anticipated and will contribute to more accurate measurements of the phase-matching directions of a crystal as well as to a higher DFG conversion efficiency.These experiments with our dual wavelength source are preliminary and encouraging validations of our capability of performing DFG in small crystals and at any pump wavelength between 1.4 μm and 3.5 μm. Even though we investigated the promises held by CdSiP2 when it is only pumped with a Nd:YAG laser at 1.064 μm, there is tremendous prospect in terms of tunable infrared generation between 3.5 μm and 8 μm when this crystal is pumped around 2.4 μm. Such early demonstrations will be highly valuable for future applications requiring compact and tunable sources spanning the infrared spectrum. From a more fundamental point of view, performing DFG experiments at different pump wavelengths in the mid-infrared can lead to a highly accurate determination of the values of the refractive indices of a nonlinear crystal. In this dissertation, we have cast the first stone of a method that leads to the determination of the values of the refractive indices of a nonlinear crystal in the mid- to far- infrared. This new method is based on the unique measurements of the DFG phase-matching angles in spheres or cylinders, and should contribute to further advances in the field of phase-matching metrology.

Download or read book Nonlinear Optical Parametric Infrared Generation written by and published by . This book was released on 1996 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: The synchronously pumped optical parametric oscillator is an efficient, wavelength tunable laser source that makes it possible to generate wavelength tunable picosecond and femtosecond pulses which cover the wavelength range from visible to midinfrared. A theoretical model for calculating the effective gain of parametric generation and amplification of ultrashort optical pulses is presented. An analytical formulation for the parametric efficiency coefficient and the effective gain in terms of six spatial and temporal characteristic lengths is obtained. Also presented is the experimental work to construct such a source based on the additive pulse mode locked Nd:YLF laser pulses. The design and characteristics of the KTP based picocsecond synchronously pumped optical parametric oscillator are discussed and compared with the previous theoretical work. Efforts to extend the wavelength range to 10 microns by use of a newly developed crystal are included. Parametric generation of femtosecond optical pulses is also presented.

Download or read book Nonlinear Infrared Generation written by Y.R. Shen and published by Springer Science & Business Media. This book was released on 2005-08-01 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: With contributions by numerous experts

Download or read book Tunable Infrared Generation Using Parametric and Raman Processes written by Stephen John Brosnan and published by . This book was released on 1979 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Octave spanning Single cycle Middle infrared Generation Through Optical Parametric Amplification in LiGaS written by Bo-Han Chen and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Interaction Of Mid infrared Parametric Waves In Laser Plasmas written by Rashid Ganeev and published by World Scientific. This book was released on 2017-02-27 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is interesting to analyze the application of mid-infrared (MIR, 1000-5000 nm) radiation to study the dynamics of the nonlinear optical response of ablated molecular structures compared with commonly used Ti: sapphire lasers for plasma high-order harmonic generation (HHG), including the studies of extended harmonics at a comparable conversion efficiency with shorter wavelength laser sources, and a search for new opportunities in improvement of the HHG conversion efficiency in the mid-IR range, such as the application of clustered molecules. This book shows the most recent findings of various new schemes of the application of MIR pulses for HHG in laser-produced low-ionised, low-density plasma plumes, which could be dubbed for simplicity as 'plasma harmonics'. The use of any element of the periodic table, as well as thousands of complex samples that exist as solids largely extends the range of materials employed, whereas only a few rare gases are typically available for gas HHG. The exploration of practically any solid-state material through the nonlinear spectroscopy comprising laser ablation and harmonic generation can be considered as a new tool for materials science. Thus the MIR pump based laser-ablation-induced high-order harmonic generation spectroscopy can be considered a new method for the study of materials and one of most important applications of plasma HHG.

Download or read book Parametric processes for generation and low noise detection of infrared light written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Parametric Generation of Infrared Radiation Using Frequency Mixing in Metal dielectricmetal Infrared Diode Experiment and Theory written by Antonio Sanchez-Rubio and published by . This book was released on 1973 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of Tunable Infrared Parametric Oscillators and Coherent Tunable Source Spectroscopy written by Stanford University. Microwave Laboratory and published by . This book was released on 1974 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the research performed under this program is to investigate and demonstrate tunable coherent infrared sources. The program consists of three parts: infrared generation in CdSe by parametric oscillation and by mixing, infrared generation in the new chalcopyrite nonlinear materials, and generation by stimulated Compton scattering (SCS). The first two parts of this program have been experimentally investigated with significant results demonstrated during the year. The third part of the program consists of a thorough theoretical study of the prospects for Stimulated Compton Scattering.

Download or read book Continuous Wave Tunable Midwave Infrared Generation Near 4 5 Micrometers with an Intracavity Optical Parametric Oscillator and Difference Frequency Generation written by and published by . This book was released on 2003 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Continuously tunable cw emission near 4.5 micrometer was generated by difference frequency generation (DFG) within a Nd:YAG pumped optical parametric oscillator (OPO). The periodically poled lithium niobate crystal used for DFO contained eight grating bands that enabled wavelength tuning between 4.25 and 5.65 micrometer. As much as 90 mW of power at 4.48 micrometer was achieved for 16.7 W of pump.

Download or read book High Power Mid Infrared Generation with a Quasi Phase Matched GaAs Guided wave Optical Parametric Oscillator written by and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: As described in our original proposal, the goal of this project is to create a new type of engineered nonlinear optical material, orientation-patterned GaAs, and use it to demonstrate improved high-power coherent mid-infrared sources. Considerable effort has been devoted over the past decade to the development of mid-IR coherent sources based on nonlinear optical frequency conversion, e.g., optical parametric oscillator (OPOs), pumped by available high-power near-IR sources such as diode-laser-pumped solid-state lasers or near-IR diode lasers themselves. The rapid development of quasiphasematched materials, especially periodically-poled ferroelectrics, has revolutionized this field for wavelengths in the 2-4 micrometers region. At 4 to 5 micrometers absorption limits the maximum power attainable to the range of several watts, and operation is entirely precluded in the 8 to 12 micrometers band. The orientation-patterned GaAs that we are developing is intended to complement periodically-poled ferroelectrics, providing a lithographically-engineerable low-loss material for high power devices at wavelengths beyond 4 micrometers.

Download or read book Resonant Parametric Generation of Infrared Radiation on Intersubband Transitions in Low Dimensional Semiconductor Heterostructures written by A. A. Belyanin and published by . This book was released on 2001 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new scheme for generation of coherent radiantion on the intersubband transition without population inversion between subbands is presented. The scheme is based on the resonant nonlinear mixing of the optical laser fields on the two interband transitions which are generated in the same active region and serve as a coherent drive for the infrared field. This mechanism for frequency self-conversion can work efficiently at room temperature and with injection current pumping. Due to the parametric nature of infrared generation the proposed inversionless scheme is especially promising for long-wvavelength (far-infrared) operation.

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 Nanosecond Tandem Optical Parametric Oscillators for Mid infrared Generation written by Markus Henriksson and published by . This book was released on 2006 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Parametric Processes for Generation and Low Noise Detection of Infrared Light written by Lasse Høgstedt 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 Solid State Mid Infrared Laser Sources written by Irina T. Sorokina and published by Springer Science & Business Media. This book was released on 2003-07-10 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book describes the most advanced techniques for generating coherent light in the mid-infrared region of the spectrum. These techniques represent diverse areas of photonics and include heterojunction semiconductor lasers, quantum cascade lasers, tunable crystalline lasers, fiber lasers, Raman lasers, and optical parametric laser sources. Offering authoritative reviews by internationally recognized experts, the book provides a wealth of information on the essential principles and methods of the generation of coherent mid-infrared light and on some of its applications. The instructive nature of the book makes it an excellent text for physicists and practicing engineers who want to use mid-infrared laser sources in spectroscopy, medicine, remote sensing and other fields, and for researchers in various disciplines requiring a broad introduction to the subject.