Download or read book Phase and Birefringence Aberration Correction written by and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A Brillouin enhanced four wave mixing phase conjugate mirror corrects phase aberrations of a coherent electromagnetic beam and birefringence induced upon that beam. The stimulated Brillouin scattering (SBS) phase conjugation technique is augmented to include Brillouin enhanced four wave mixing (BEFWM). A seed beam is generated by a main oscillator which arrives at the phase conjugate cell before the signal beams in order to initiate the Brillouin effect. The signal beam which is being amplified through the amplifier chain is split into two perpendicularly polarized beams. One of the two beams is chosen to be the same polarization as some component of the seed beam, the other orthogonal to the first. The polarization of the orthogonal beam is then rotated 90.degree. such that it is parallel to the other signal beam. The three beams are then focused into cell containing a medium capable of Brillouin excitation. The two signal beams are focused such that they cross the seed beam path before their respective beam waists in order to achieve BEFWM or the two signal beams are focused to a point or points contained within the focused cone angle of the seed beam to achieve seeded SBS, and thus negate the effects of all birefringent and material aberrations in the system.
Download or read book Official Gazette of the United States Patent and Trademark Office written by and published by . This book was released on 1996 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Correction of Phase Distortion by Nonlinear Optical Techniques written by R. C. Lind and published by . This book was released on 1981 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the final report on a program designed to explore a recently recognized property of certain nonlinear optical interactions of generating conjugate wavefronts that can be used to correct optical distortions in laser systems. These distortions include optical train aberrations, laser medium distortions, and atmospheric propagation aberrations. The program was divided into three basic areas that bridge the gap between a preliminary exploration of the applicable nonlinear processes and realization of their potential usefulness to laser systems. The areas were to measure quantitatively the properties of phase conjugation by four-wave mixing and SBS, to develop a theoretical understanding of nonlinear phase conjugation, and to determine the applicability of nonlinear phase conjugation to various systems of interest to DARPA. Experimentally Demonstrated: Four-wave reflectivity exceeding unity in the green; Complete aberration correction by four-wave mixing and SBS for severely aberrated beams (approx. 35X diffraction limit), Viable approaches to angle offset using four-wave mixing; and Input/output separation using polarization properties of four-wave mixing.
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 Adaptive Aberration Correction Using Feedback Interferometry written by Geoffrey Terence Bold and published by . This book was released on 1996 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Progress in Optics written by and published by Elsevier. This book was released on 2008-01-25 with total page 577 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the fourty-six years that have gone by since the first volume of Progress in Optics was published, optics has become one of the most dynamic fields of science. The volumes in this series which have appeared up to now contain more than 300 review articles by distinguished research workers, which have become permanent records for many important developments. - Metamaterials - Polarization Techniques - Linear Baisotropic Mediums - Ultrafast Optical Pulses - Quantum Imaging - Point-Spread Funcions - Discrete Wigner Functions
Download or read book Brillouin enhanced Four wave mixing Phase Conjugator with Correction for Material Thermal and Birefringence Aberrations and Passive Output Control written by and published by . This book was released on 1995 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have developed a laser system that incoroprates a vector phase conjugate mirror that corrects for both spatial and polarization distortions. The fractional output coupling can be varied mechanically from 0 to 100%.
Download or read book Handbook of Nonlinear Optics written by Richard L. Sutherland and published by CRC Press. This book was released on 2003-04-22 with total page 1122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examining classic theories, experimental methods, and practical formulas for exploration of the core topics in nonlinear optics, the second edition of this acclaimed text was extensively revised to reflect recent advances in the analysis and modification of material properties for application in frequency conversion, optical switching and limiting, multiphoton absorption, and electro-optic effects. Handbook of Nonlinear Optics, Second Edition contains additional chapters on ultrafast characterization techniques, laser flash photolysis, and the electro-optic effect as well as expanded coverage of nonlinear optics in fibers and pulsed two-beam coupling.
Download or read book Science Technology Review written by and published by . This book was released on 1996 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polymer Microscopy written by Linda Sawyer and published by Springer Science & Business Media. This book was released on 2008-12-24 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: This extensively updated and revised Third Edition is a comprehensive and practical guide to the study of the microstructure of polymers. It is the result of the authors' many years of academic and industrial experience. Introductory chapters deal with the basic concepts of both polymer morphology and processing and microscopy and imaging theory. The core of the book is more applied, with many examples of specimen preparation and image interpretation leading to materials characterization. Emerging techniques such as compositional mapping in which microscopy is combined with spectroscopy are considered. The book closes with a problem solving guide.
Download or read book Proceedings of the 2nd International Workshop on Adaptive Optics for Industry and Medicine written by Gordon D. Love and published by World Scientific. This book was released on 2000 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains state-of-the-art research papers on adaptive optics used outside the usual astronomical and military applications. It is the first book to cover this new area of research. One of the main industrial applications is in the control of laser wavefronts, and the book contains papers on both intra- and extra-laser cavity correction. The measurement and control of ocular aberrations is the major medical application, and the topics are discussed by leading researchers in the field. Papers on adaptive optics components specifically for non-astronomical systems are also presented. Other topics include laser communications, microscopy and low-cost systems.
Download or read book Laser Resonators written by and published by . This book was released on 2001 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Adaptive Optics for Industry and Medicine written by Christopher Dainty and published by Imperial College Press. This book was released on 2008 with total page 519 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings volume presents the very latest developments in non-astronomical adaptive optics. This international workshop, the sixth in a biennial series, was the largest ever held and boasted significant involvement by industry. Adaptive optics is on the verge of being used in many products; indeed, at this meeting, the use of adaptive optics in DVD players was disclosed for the first time. Sample Chapter(s). Liquid Crystal Lenses For Correction Of Presbyopia (586 KB). Contents: Wavefront Correctors and Control: Liquid Crystal Lenses for Correction of Presbyopia (G Li & N Peyghambarian); Woofer-Tweeter Adaptive Optics (T Farrell & C Dainty); Wavefront Sensors: A Fundamental Limit for Wavefront Sensing (C Paterson); Direct Diffractive Image Simulation (A P Maryasov et al.); Adaptive Optics in Vision Science: A Study of Field Aberrations in the Human Eye (A V Goncharov et al.); Characterization of an AO-OCT System (J W Evans et al.); Adaptive Optics in Optical Storage and Microscopy: Commercialization of the Adaptive Scanning Optical Microscope (ASOM) (B Potsaid et al.); Towards Four Dimensional Particle Tracking for Biological Applications (H I Campbell et al.); Adaptive Optics in Lasers: New Results in High Power Lasers Beam Correction (A Kudryashov et al.); Adaptive Optics Control of Solid-State Lasers (W Lubeigt et al.); Adaptive Optics in Communication and Atmospheric Compensation: Fourier Image Sharpness Sensor for Laser Communications (K N Walker & R K Tyson); Adaptive Optics System for a Small Telescope (G Vdovin et al.); and other papers. Readership: Industry- and university-level researchers in optics and laser physics.
Download or read book Optical Engineering written by and published by . This book was released on 2004 with total page 984 pages. Available in PDF, EPUB and Kindle. Book excerpt: Publishes papers reporting on research and development in optical science and engineering and the practical applications of known optical science, engineering, and technology.
Download or read book Wavefront Aberration Correction Using Zernike Polynomial Parameterizations of Optical Phased Arrays PREPRINT written by and published by . This book was released on 2006 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: High performance laser communication systems require adaptive optics based wavefront correction systems to correct aberrations that result from imperfections in optical hardware and atmospheric conditions. Traditionally, deformable membrane mirrors are used for wavefront correction. These mirrors are bulky and require excessive amounts of power, both of which can be detrimental to a space application. Liquid crystal based optical phased arrays (OPAs) offer an attractive alternative to these traditional devices. This paper presents a method of correcting wavefront aberrations with an OPA device by utilizing phase reconstruction of point-source images and Zernike polynomial parameterizations of the OPA. Limitations of common OPA architectures that reduce the effectiveness of the proposed wavefront correction method will be discussed. A simulation will demonstrate the effectiveness of the proposed technique.
Download or read book Selected Topics in Optical Coherence Tomography written by Gangjun Liu and published by BoD – Books on Demand. This book was released on 2012-02-08 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book includes different exciting topics in the OCT fields, written by experts from all over the world. Technological developments, as well as clinical and industrial applications are covered. Some interesting topics like the ultrahigh resolution OCT, the functional extension of OCT and the full field OCT are reviewed, and the applications of OCT in ophthalmology, cardiology and dentistry are also addressed. I believe that a broad range of readers, such as students, researchers and physicians will benefit from this book.
Download or read book High Average Power Pulsed Phase Conjugate Laser with Birefringence Correction Revision 1 written by and published by . This book was released on 1994 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nd:YAG rod lasers have been plagued with the inability to go to high average powers because of thermally induced birefringence and focusing. Several methods have been employed to correct for the birefringence and the thermal aberrations of such systems, but place stringent constraints on the laser heads and/or the system alignment. They have developed a scalable Nd: YAG master oscillator/power amplifier (MOPA) laser system which employs a novel phase conjugation scheme to correct both for the material and thermal distortions as well as the thermal birefringence in double pass amplifier systems. This method reduces the double pass depolarization from 42% to less than 2% and is easy to align.
