Download or read book The Application of Phase Conjugation to High Power Lasers Using Stimulated Brillouin Scattering written by Robert Andrew Lamb and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Application of Optical Phase Conjugation to High Power Lasers Using Stimulated Brillouin Scattering written by and published by . This book was released on 1994 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phase Conjugate Laser Optics written by Arnaud Brignon and published by John Wiley & Sons. This book was released on 2003-12 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: A complete review of the state of the art of phase conjugate lasers, including laser demonstrations, performances, technology and selection of the most important class of nonlinear media. * Emphasizes the basic aspects of phase conjugation. * Chapter authors have all made major contributions to their subjects.
Download or read book Advances in Lasers and Electro Optics written by Nelson Costa and published by IntechOpen. This book was released on 2010-04-01 with total page 858 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lasers and electro-optics is a field of research leading to constant breakthroughs. Indeed, tremendous advances have occurred in optical components and systems since the invention of laser in the late 50s, with applications in almost every imaginable field of science including control, astronomy, medicine, communications, measurements, etc. If we focus on lasers, for example, we find applications in quite different areas. We find lasers, for instance, in industry, emitting power level of several tens of kilowatts for welding and cutting; in medical applications, emitting power levels from few milliwatt to tens of Watt for various types of surgeries; and in optical fibre telecommunication systems, emitting power levels of the order of one milliwatt. This book is divided in four sections. The book presents several physical effects and properties of materials used in lasers and electro-optics in the first chapter and, in the three remaining chapters, applications of lasers and electro-optics in three different areas are presented
Download or read book Stimulated Brillouin Scattering written by M J Damzen and published by CRC Press. This book was released on 2003-09-01 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stimulated Brillouin scattering (SBS) is the most important example of a stimulated scattering process-light scattering that occurs when the intensity of the light field itself affects the propagating medium. A phenomenon that has been known of for some 35 years in solid state laser research, it has recently become relevant in the optical fiber ind
Download or read book Limitations to the Quality of Optical Phase Conjugation by Stimulated Brillouin Scattering written by Thomas Richard Moore and published by . This book was released on 1993 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phase Conjugation of High Energy Lasers written by and published by . This book was released on 2013 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this report we explore claims that phase conjugation of high energy lasers by stimulated Brillouin scattering (SBS) can compensate optical aberrations associated with severely distorted laser amplifier media and aberrations induced by the atmosphere. The SBS media tested was a gas cell pressurized up to 300 psi with SF6 or Xe or both. The laser was a 10 Hz, 3J, Q-switched Nd:YAG with 25 ns wide pulses. Atmospheric aberrations were created with space heaters, helium jets and phase plates designed with a Kolmogorov turbulence spectrum characterized by a Fried parameter, ro, ranging from 0.6 - 6.0 mm. Phase conjugate tests in the laboratory were conducted without amplification. For the strongest aberrations, D/ro ~ 20, created by combining the space heaters with the phase plate, the Strehl ratio was degraded by a factor of ~50. Phase conjugation in SF6 restored the peak focusable intensity to about 30% of the original laser. Phase conjugate tests at the outdoor laser range were conducted with laser amplifiers providing gain in combination with the SBS cell. A large 600,000 BTU kerosene space heater was used to create turbulence along the beam path. An atmospheric structure factor of Cn2 = 5x10-13 m2/3 caused the illumination beam to expand to a diameter 250mm and overfill the receiver. The phase conjugate amplified return could successfully be targeted back onto glints 5mm in diameter. Use of a lenslet arrays to lower the peak focusable intensity in the SBS cell failed to produce a useful phase conjugate beam; The Strehl ratio was degraded with multiple random lobes instead of a single focus. I will review literature results which show how multiple beams can be coherently combined by SBS when a confocal reflecting geometry is used to focus the laser in the SBS cell.
Download or read book Optical Phase Conjugation Via Stimulated Brillouin Scattering in Multimode Optical Fiber written by and published by . This book was released on 1990 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this thesis was to obtain phase conjugation of laser beam using the process of stimulated Brillouin scattering (SBS) in optical fiber and to characterize the parameters involved. SBS in fiber is used for several reasons: high conversion efficiency, nanosecond response time, only the signal beam is required and fiber has a lower SBS threshold and superior power handling capabilities compared to either crystals or liquids. SBS theory is briefly described along with some results from previous work. Experimental results show the multimode fiber losses at coupled powers below about 2 W to be 16.4 + or - 0.3 dB/km at 514.5 nm. The transmitted and backscattered power exhibited behavior similar to that previously reported for single-mode fiber. The SBS threshold power increased for shorter fibers and when index matching liquid was used. The Stokes shift was 32.78 + or - 0.02 GHz and the measured gain coefficient was 10.2 times 10( -9) cm/W with an error of 10%. Most importantly, nonlinear optical phase conjugation was demonstrated for the first time. The polarization state of the pump beam was not reproduced, however. In addition, the SBS power exhibited bursts of strong fluctuations.
Download or read book Phase Conjugation of Laser Emission written by Nikolaĭ Gennadievich Basov and published by Nova Publishers. This book was released on 1988 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents results from fundamental research on the phenomenon of phase conjugation of laser emission discovered at the Physics Institute of the Academy of Sciences during stimulated scattering in hypersound, and with four-wave interaction in a wavelength range from the visible through the mid-infrared. Fundamentally new optical designs and methods of controlling laser emission are proposed and tested experimentally on the basis of this effect.
Download or read book Optical Phase Conjugation Via Stimulated Brillouin Scattering in a Brillouin Ring Laser written by Jeffrey J. Druessel (CAPT, USAF.) and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optical Phase Conjugation Via Stimulated Brillouin Scattering in a Brillouin Ring Laser written by Jeffrey J. Druessel and published by . This book was released on 1991 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stimulated Brillouin scattering (SBS) was demonstrated in multimode optical fiber using a Brillouin ring laser configuration. The frequency shift of the SBS generated output beam was measured at 33.1 GHz. Pump laser power thresholds for SBS onset were determined for several ring cavity configurations and compared to theoretical values. optical phase conjugating properties of SBS in multimode optical fiber were investigated. No phase conjugation of an aberrated pump beam was evident in the Brillouin ring laser output.
Download or read book Advanced Phased Array Chemical High Energy APACHE Laser Program Volume 1 written by and published by . This book was released on 1990 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume I of the final report for the Advanced Phased Array Chemical High Energy (APACHE) laser program presents phase conjugate laser technology which verifies and demonstrates the key technologies associated with phase conjugation of high power continuous wave chemical lasers using stimulated Brillouin scattering (SBS). These demonstrations include: SBS under long pulse conditions simulating CW operation that demonstrates the feasibility of using SBS for a high power, CW laser; near diffraction limited performance for beam combination at the HF wavelength using SBS in high pressure xenon; flowing-gas SBS cell experiments demonstrating fluid mechanics capability for using a flowing SBS medium for CW SBS applications; SBS conjugation experiments using a 19-element segmented mirror showing the ability of SBS to correct piston and tilt misalignment errors in a multielement segmented optic; and experiments to determine how feedback to the master oscillator from the SBS cell affects system performance.
Download or read book High Energy average Power Lasers and Intense Beam Applications written by Michael C. Heaven and published by SPIE-International Society for Optical Engineering. This book was released on 2007 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of SPIE present the original research papers presented at SPIE conferences and other high-quality conferences in the broad-ranging fields of optics and photonics. These books provide prompt access to the latest innovations in research and technology in their respective fields. Proceedings of SPIE are among the most cited references in patent literature.
Download or read book An Experimental Study of Phase Conjugation Via Stimulated Brillouin Scattering Applied to a High Power Nd YAG Oscillator amplifier Laser System written by I. D. Carr and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stimulated Brillouin Scattering written by M J Damzen and published by CRC Press. This book was released on 2003-09-01 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stimulated Brillouin scattering (SBS) is the most important example of a stimulated scattering process-light scattering that occurs when the intensity of the light field itself affects the propagating medium. A phenomenon that has been known of for some 35 years in solid state laser research, it has recently become relevant in the optical fiber ind
Download or read book CW Continuous Wave Stimulated Brillouin Scattering of Long Pulse Chemical Laser Beams written by and published by . This book was released on 1989 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Backward Stimulated Brillouin Scattering (SBS) is currently under consideration as a nonlinear optical process for passive phase conjugation (beam clean up) phase matching (beam combination), and pointing and tracking of continuous-wave (CW) HF chemical lasers for high power applications. Theoretical considerations indicate, however, that forward SBS processes dominate over backward SBS phenomena in the steady-state limit, so that SBS exhibits the desired properties (phase conjugation) only for short time periods. Since backward SBS thresholds for CW HF lasers are about 0.20 MW per spectral line, long-pulse laboratory chemical laser sources (PCLs) are needed to investigate small-angle forward scattering phenomena and the development of techniques for their suppression. The laser data presented herein suggest that a moderate- volume, photolysis-pumped PCL is a suitable source for the study of steady-state forward SBS processes and their suppression. In particular, low pressure PCLs can simulate CW HF-laser SBS behavior under conditions of the proper bandwidth, laser spectrum, SBS media effects, longitudinal mode structure, and other high-power HF laser characteristics.
Download or read book A Study of Stimulated Brillouin Scattering and Its Application to Phase Conjugate Oscillators written by Martin Victor O'Connor and published by . This book was released on 1997 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of stimulated Brillouin scattering and its use for correcting phase aberrations in laser oscillators.
