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Author: Joe Jeouru Tiee
Publisher:
ISBN:
Category : Infrared sources
Languages : en
Pages : 386
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Book Description
Author: Joe Jeouru Tiee
Publisher:
ISBN:
Category : Infrared sources
Languages : en
Pages : 386
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Book Description
Author: Peter Cheo
Publisher: CRC Press
ISBN: 1351829904
Category : Technology & Engineering
Languages : en
Pages : 506
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Book Description
Optical science, engineering, and technology have grown rapidly in the last decade so that today optical engineering has emerged as an important discipline in its own right. This series is devoted to discussing topics in optical engineering at a level that will be useful to those working in the field or attempting to design systems that are based on optical techniques or that have significant optical subsystems.
Author: Kenneth J. Button
Publisher: Springer Science & Business Media
ISBN: 1461326893
Category : Technology & Engineering
Languages : en
Pages : 484
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Book Description
This book represents a compendium of the twenty most useful far-infrared (or submillimeter) lasers. In the case of each laser described here, we have been fortunate to have the author who is the pioneer and acknowledged authority describe the principles of operation and to prepare the list of emission lines. Until these lasers were developed during the past decade, the submillimeter range of the spectrum has been almost barren due to lack of sources of radiation. The lasers described here remain the only practical, powerful source of radiation between the wavelengths of one millimeter and ten micrometers. Many hundreds of emission lines have been listed here, some providing hundreds of kilowatts of peak power in pulsed operation, others providing many tens of milliwatts of continuous power. The hundreds of wavelengths of the emission lines are so closely spaced in the wavelength range between one millimeter and one-tenth millimeter that this source of radiation can be considered to be step-tunable. Of course, labora tory scientists still depend upon the black body source (mercury vapor lamp) and the Fourier transform spectrometer to provide con tinuous spectra, but for this we must deal with true energy starva tion at the sub-microwatt level. This critical review can be expected to serve as a handbook for decades in the future because it contains descriptions of fundamen tal principles and listings of fundamental physical data.
Author: Paul D. Coleman
Publisher:
ISBN:
Category :
Languages : en
Pages : 138
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Book Description
This report summarizes studies on optically pumped far infrared molecular gas lasers. The research has been concerned with the general subjects of far infrared integrated optics and technology, the discovery of new optically pumped molecular laser systems, and the study and analysis of nonlinear processes (Raman and hyper-Raman) that can occur in optically pumped systems. The theoretical density matrix analysis of the gain spectra of nonlinear systems and the first detailed experimental measurements of these systems are presented. It is demonstrated that third and fifth order nonlinear processes can exceed first order laser processes. An experimental study of the generation of a 22.653 GHz signal (the largest wavelength yet reported) in optically pumped NH3 is described. The frequency tunability and single shot spectral characteristics of the signal were measured with precision. A single laser pump in a four-level system can yield two laser signals, which in the linear case are not coupled together. However, with stronger pumping, nonlinear effects can couple the two laser signals with the result that the behavior of one laser signal is determined by the other and vice versa. The self-consistent analysis of this problem is described.
Author: Kenneth J. Button
Publisher: Springer
ISBN:
Category : Science
Languages : en
Pages : 532
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Book Description
This book represents a compendium of the twenty most useful far-infrared (or submillimeter) lasers. In the case of each laser described here, we have been fortunate to have the author who is the pioneer and acknowledged authority describe the principles of operation and to prepare the list of emission lines. Until these lasers were developed during the past decade, the submillimeter range of the spectrum has been almost barren due to lack of sources of radiation. The lasers described here remain the only practical, powerful source of radiation between the wavelengths of one millimeter and ten micrometers. Many hundreds of emission lines have been listed here, some providing hundreds of kilowatts of peak power in pulsed operation, others providing many tens of milliwatts of continuous power. The hundreds of wavelengths of the emission lines are so closely spaced in the wavelength range between one millimeter and one-tenth millimeter that this source of radiation can be considered to be step-tunable. Of course, labora tory scientists still depend upon the black body source (mercury vapor lamp) and the Fourier transform spectrometer to provide con tinuous spectra, but for this we must deal with true energy starva tion at the sub-microwatt level. This critical review can be expected to serve as a handbook for decades in the future because it contains descriptions of fundamen tal principles and listings of fundamental physical data.
Author: Paul D. Coleman
Publisher:
ISBN:
Category :
Languages : en
Pages : 45
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Book Description
An experimental and theoretical investigation of electrically excited glow discharge CO2 lasers has resulted in new data on the electron excitation efficiency and the intrinsic V-V relaxation rates for the 10.6 and 9.6 micrometers laser transitions. Preliminary experimental results on the E-beam controlled CO2 laser are desirable. Experiments using both high power and low power CO2 lasers as excitation sources for the generation of far IR laser IR laser action are described. Subsequent research includes the discovery of over 100 new lasing transitions and the generation of over 5 kW pulse power at 496 micrometers in CH3F. (Author).
Author: Kenneth J. Button
Publisher: Elsevier
ISBN: 0323153852
Category : Technology & Engineering
Languages : en
Pages : 360
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Book Description
Infrared and Millimeter Waves is a series of books that compiles the work of several authors, with each volume focusing on certain aspects of infrared and millimeter waves, such as sources of radiation, instrumentation, and millimeter systems. This book is the first of a two-part volume that covers the coherent sources and applications of infrared and millimeter waves. The first chapter discusses sources and applications, while the second chapter provides a comprehensive discussion about spectroscopy of molecules by far-infrared laser emission. This is followed by a discussion of stark spectroscopy and frequency tuning in optically pumped far-infrared molecular lasers. Measured performance of gyrotron oscillators and amplifiers is also covered. This book will be of great use to researchers and professionals whose work involves infrared and millimeter waves.
Author: A. Z. Grasiuk
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: V. A. Batanov
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
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Book Description
The advantages of molecular gases in lasers with noncoherent optical pumping are well known and conditioned on the one hand by a relatively broad spectral pumping-light absorption band, and on the other by a relatively narrow working-transition line width. One such laser - the photodissociation laser - has been in existence for a long time already. The present paper proposes an infrared molecular laser with optical pumping to the vibrational-rotational band of the molecule in the electron ground state, and noncoherent emission from an 'immovable' shock wave arising during steady escape of the working mixture from the nozzle under conditions of incomplete expansion of the gas into the atmosphere. The composition of this gas can either correspond or not with that of the working mixture. Everywhere below, for simplicity, by working mixture the authors mean the mixture CO2 + N2 + He. In this, helium plays the same role as in CO2 lasers with electrical discharge. The nitrogen mixture is not necessary to achieve inversion, but it proves favorable, laser level and, secondly, to expansion of the vibrational-rotational pumping absorption band.
Author: Kenneth J. Button
Publisher: Elsevier
ISBN: 0323144713
Category : Technology & Engineering
Languages : en
Pages : 608
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Book Description
Infrared and Millimeter Waves V7
