Author: Eddie L. RoyPublisher:
ISBN:
Category : Lasers
Languages : en
Pages : 76
Book Description
A Literature Survey on the Atmospheric Effects on the Propagation of 1.06 Micron Laser Radiation
Author: Eddie L. RoyBericht für das Jahr 1994 zum Verwaltungsbericht des Regierungsrates, zum Bericht des Appellationsgerichtes, zum Bericht des Ombudsman und über besondere Wahrnehmungen
Author: A Review of the Atmospheric Effects on Laser Propagation
Author: W. E. WebbPublisher:
ISBN:
Category :
Languages : en
Pages : 27
Book Description
The purpose of the report is to present a review of the atmospheric effects on laser propagation. Molecular absorption by the earth's atmosphere should not present an insurmountable problem for ruby or neodymium laser systems. However, both the water vapor and the carbon dioxide present in the atmosphere strongly absorb radiation at carbon dioxide wavelengths; this may present a serious problem to systems employing carbon dioxide lasers. Clean air scattering does not seem to be a serious problem. Aerosol scattering, however, is quite severe and will, except in the clearest weather, strictly limit the operation of ground-based laser communication systems. Atmospheric turbulence also poses a serious limitation on the performance of optical communication systems. However, on the basis of the presently available data it does not seem that atmospheric turbulence will necessarily render laser communication systems unfeasible. (Author).
Technical Abstract Bulletin
Author: Scientific and Technical Aerospace Reports
Author: Effects of Particulate Matter on Atmospheric Propagation of CO2 Laser Radiation
Author: David C. SmithPublisher:
ISBN:
Category :
Languages : en
Pages : 44
Book Description
The two main nonlinear propagation problems encountered by high power CO2 laser radiation in the atmosphere are gas breakdown and thermal blooming. The influence of particulate matter on gas breakdown and also on thermal blooming was investigated. Typical atmospheric conditions contain approximately 1000 particles/cc. The presence of these particles in the air path of a high power laser beam can dramatically influence the propagation of the beam. This is illustrated by a photograph which shows particles being vaporized and ionized by a high power pulsed CO2 laser beam. The plasma balls generated not only attenuate the laser radiation, but they also act as scattering centers with completely different scattering characteristics than the original particles. The hot vapor can also act as a thermal source which could cause self-induced thermal distortion of subsequent laser pulses.
State-of-the-Art Survey of Meteorological Instrumentation Required to Determine Atmospheric Effects on Airborne Laser Tests
Author: Kenneth O. WhitePublisher:
ISBN:
Category :
Languages : en
Pages : 85
Book Description
The determination of state-of-the-art meteorological or other systems applicable to the measurement of the atmospheric parameters that affect laser beam propagation is reported in this study. A concept of meteorological support initially envisioning instrumentation deployed in ground-based, balloon-borne, and aircraft-borne systems is developed. Various state-of-the-art techniques and instruments are discussed and compared, with recommendations being made as to the best technique or instrument for the initial system. Calculations of the range dependence of the signal-to-noise ratio for current state-of-the-art lidar systems are presented. An advanced system envisioning solely aircraft-deployed laser remote sensors is conceived. A program to develop improved meteorological instrumentation for airborne laser test is suggested which contains three areas: (1) the determination of those atmospheric parameters which most influence laser radiation; (2) the determination of the variability of these parameters; and (3) the development of remote sensing systems to measure the parameters. (Author).
Air Pollution Abstracts
Author: Springer Handbook of Lasers and Optics
Author: Frank TrägerPublisher: Springer Science & Business Media
ISBN: 3642194095
Category : Science
Languages : en
Pages : 1704
Book Description
This new edition features numerous updates and additions. Especially 4 new chapters on Fiber Optics, Integrated Optics, Frequency Combs and Interferometry reflect the changes since the first edition. In addition, major complete updates for the chapters: Optical Materials and Their Properties, Optical Detectors, Nanooptics, and Optics far Beyond the Diffraction Limit. Features Contains over 1000 two-color illustrations. Includes over 120 comprehensive tables with properties of optical materials and light sources. Emphasizes physical concepts over extensive mathematical derivations. Chapters with summaries, detailed index Delivers a wealth of up-to-date references.
Advances In Wave Turbulence
Author: Victor ShriraPublisher: World Scientific
ISBN: 9814520802
Category : Mathematics
Languages : en
Pages : 294
Book Description
Wave or weak turbulence is a branch of science concerned with the evolution of random wave fields of all kinds and on all scales, from waves in galaxies to capillary waves on water surface, from waves in nonlinear optics to quantum fluids. In spite of the enormous diversity of wave fields in nature, there is a common conceptual and mathematical core which allows to describe the processes of random wave interactions within the same conceptual paradigm, and in the same language. The development of this core and its links with the applications is the essence of wave turbulence science (WT) which is an established integral part of nonlinear science.The book comprising seven reviews aims at discussing new challenges in WT and perspectives of its development. A special emphasis is made upon the links between the theory and experiment. Each of the reviews is devoted to a particular field of application (there is no overlap), or a novel approach or idea. The reviews cover a variety of applications of WT, including water waves, optical fibers, WT experiments on a metal plate and observations of astrophysical WT.