Solar Pumped Alkali Vapor Laser
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Solar Pumped Alkali Vapor Laser
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Author : David Ham
language : en
Publisher:
Release Date : 1987
Solar Pumped Alkali Vapor Laser written by David Ham and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with categories.
High power lasers based in space have been considered as sources for power transmission, laser propulsion, materials processing and space defense. The feasibility of such systems is based on the cost per unit power delivered, with detailed studies indicating that light weight has a greater impact on cost than laser efficiency. Solar radiation is a natural source of power for these devices and two methods for conversion of solar radiation to laser radiation can be considered. An indirectly solar pumped laser would first convert the solar radiation to electricity or longer wavelength blackbody radiation which is then used to power the laser. A directly longer wavelength blackbody radiation which is then used to power the laser. A directly pumped solar laser would utilize a portion of te solar spectrum to directly pump the laser medium, eliminating the intervening step and substantially reducing the systems weight and complexity. Detailed comparisons showed a directly pumped laser with an overall efficiency of only 1.5 percent can compete with an indirectly energized solar laser with an overall efficiency of ten percent. With this in mind, a concept for a directly solar pumped laser was developed based on an alkali vapor (sodium) as the laser medium. Keywords: Solar, Laser.
Diode Pumped Alkali Vapor Fiber Laser
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Author :
language : en
Publisher:
Release Date : 2006
Diode Pumped Alkali Vapor Fiber Laser written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
A method and apparatus is provided for producing near-diffraction-limited laser light, or amplifying near-diffraction-limited light, in diode pumped alkali vapor photonic-band-gap fiber lasers or amplifiers. Laser light is both substantially generated and propagated in an alkali gas instead of a solid, allowing the nonlinear and damage limitations of conventional solid core fibers to be circumvented. Alkali vapor is introduced into the center hole of a photonic-band-gap fiber, which can then be pumped with light from a pump laser and operated as an oscillator with a seed beam, or can be configured as an amplifier.
New Class Of Cw High Power Diode Pumped Alkali Lasers Dpals
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Author : S. A. Payne
language : en
Publisher:
Release Date : 2004
New Class Of Cw High Power Diode Pumped Alkali Lasers Dpals written by S. A. Payne and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
The new class of diode-pumped alkali vapor lasers (DPALs) offers high efficiency cw laser radiation at near-infrared wavelengths: cesium 895 nm, rubidium 795 nm, and potassium 770 nm. The working physical principles of DPALs will be presented. Initial 795 nm Rb and 895 nm Cs laser experiments performed using a titanium sapphire laser as a surrogate pump source demonstrated DPAL slope power conversion efficiencies in the 50-70% range, in excellent agreement with device models utilizing only literature spectroscopic and kinetic data. Using these benchmarked models for Rb and Cs, optimized DPALs with optical-optical efficiencies>60%, and electrical efficiencies of 25-30% are projected. DPAL device architectures for near-diffraction-limited power scaling into the high kilowatt power regime from a single aperture will be described. DPAL wavelengths of operation offer ideal matches to silicon and gallium arsenide based photovoltaic power conversion cells for efficient power beaming.
Multimode Diode Pumped Gas Alkali Vapor Laser
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Author :
language : en
Publisher:
Release Date : 2005
Multimode Diode Pumped Gas Alkali Vapor Laser written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
We report the first demonstration of a multimode-diode-pumped gas laser--Rb vapor operating on the 795 nm resonance transition. Peak output of (almost equal to)1 Watt was obtained using a volume-Bragg-grating stabilized pump diode array. The laser's output radiance exceeded the pump radiance by a factor greater than 2000. Power scaling (by pumping with larger diode arrays) is therefore possible.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1992
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Aeronautics categories.
Dpal
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Author :
language : en
Publisher:
Release Date : 2003
Dpal written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
The new class of diode pumped alkali vapor lasers (DPALs) offers high efficiency cw laser beams at wavelengths which efficiently couple to photovoltaic (PV) cells: silicon cells at 895 nm (cesium), and GaAs cells at 795 nm (rubidium) and at 770 nm (potassium). DPAL electrical efficiencies of 25-30% are projected, enabling PV cell efficiencies (almost equal to)40% (Si) and (almost equal to)60% (GaAs). Near-diffraction-limited DPAL device power scaling into the multi-kilowatt regime from a single aperture is projected.
Comparison Of Electrically Driven Lasers For Space Power Transmission
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Author :
language : en
Publisher:
Release Date : 1988
Comparison Of Electrically Driven Lasers For Space Power Transmission written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Lasers categories.
Technical Reports Awareness Circular Trac
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Author :
language : en
Publisher:
Release Date : 1988-02
Technical Reports Awareness Circular Trac written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988-02 with Science categories.
Lasers And Masers A Continuing Bibliography
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Author : United States. National Aeronautics and Space Administration
language : en
Publisher:
Release Date : 1965
Lasers And Masers A Continuing Bibliography written by United States. National Aeronautics and Space Administration and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with Lasers categories.
Solid State Laser Engineering
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Author : Walter Koechner
language : en
Publisher: Springer
Release Date : 2013-11-11
Solid State Laser Engineering written by Walter Koechner and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-11-11 with Science categories.
This book is written from an industrial perspective and provides a detailed discussion of solid-state lasers, their characteristics, design and construction. Emphasis is placed on engineering and practical considerations. The book is aimed mainly at the practicing scientist or engineer who is interested in the design or use of solid-state lasers, but the comprehensive treatment of the subject will make the work useful also to students of laser physics who seek to supplement their theoretical knowledge with engineering information. In order to present the subject as clearly as possible, phenomenological descriptions using models have been used rather than abstract mathematical descriptions. This results in a simplified presentation. The descriptions are enhanced by the inclusion of numerical and technical data, tables and graphs. This new edition has been updated and revised to take account of important new developments, concepts, and technologies that have emerged since the publication of the first and second editions.