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IEEE Journal of Quantum Electronics

Issue 1  Part 2 • January 1973

 This issue contains several parts.Go to:  Part 1 

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Displaying Results 1 - 25 of 91
  • [Front cover and table of contents]

    Publication Year: 1973, Page(s): 0
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    Freely Available from IEEE
  • Preface

    Publication Year: 1973, Page(s): 49
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    Freely Available from IEEE
  • MA1 - Laser-excited vibrational energy transfer studies of HF, CO, and NO

    Publication Year: 1973, Page(s):50 - 58
    Cited by:  Papers (42)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3455 KB)

    An electrically initiated pulsed HF chemical laser has been used to measure vibrational relaxation of HF (upsilon = 1), CO (upsilon = 1), and NO (upsilon = 1) at 295 ± 2 K. The self-relaxation rate of HF highly dilute in argon is(8.7 pm 0.1) times 10^{4} s^{-1}torr-1and is independent of rotational level excitation over laser transitions<... View full abstract»

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  • MA7 - Measurement of the temperature dependence of the vibrational relaxation rate of HF and the effect of SF6, N2and F2as diluents

    Publication Year: 1973, Page(s):59 - 64
    Cited by:  Papers (40)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1847 KB)

    The vibrational relaxation of HF was measured by the laser-excited fluorescence technique over the temperature range of 295-730 K. The results are in agreement with the 350 K measurement of Airey and Fried and are consistent with the high-temperature shock-tube results of Bott and Cohen and those of Solomon et al. These results are compared with a theoretical calculation of Shin. The effect of N View full abstract»

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  • MC7 - Chemical laser studies of vibrational energy distributions: The equal-gain and zero-gain temperature techniques

    Publication Year: 1973, Page(s):64 - 72
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3232 KB)

    The Statz and de Mars rate equations applied to gaseous lasers reproduce experimentally observed threshold times, initial pulse spiking, and transient oscillatory behavior. Hence they provide a theoretical basis for the equal-gain temperature method, which is based upon comparison of times to threshold. This method is generalized by use of a grating in the optical cavity to permit selection of any... View full abstract»

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  • MD1 - The transfer chemical laser: A review of recent research

    Publication Year: 1973, Page(s):72 - 83
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4840 KB)

    Processes of collisional redistribution of vibrational energy prevail over specific chemical reaction mechanisms in the determination of vibrational energy distributions in present hydrogen halide CW chemical lasers. Despite the resultant relatively modest departures from the Maxwell-Boltzmann form for the distribution of energy among the vibrational levels of product molecules, selective vibratio... View full abstract»

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  • MD2 - A high-pressure pulsed CO2chemical transfer laser

    Publication Year: 1973, Page(s):83 - 93
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3760 KB)

    The exothermic chain reactions between deuterium and fluorine were used to produce strong laser emission from carbon dioxide in a high-pressure pulsed transfer laser. The chemical chain reaction was initiated by flash photolysis of the reactive components. The active constituents were diluted in helium and premixed at temperatures of approximately -65°C to improve stability of the mixture. Pe... View full abstract»

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  • MD4 - A kinetic model and computer simulation for a pulsed DF-CO2chemical transfer laser

    Publication Year: 1973, Page(s):94 - 113
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6181 KB)

    The chemical and energy transfer reactions involved in the helium-diluted DF-CO2chemical transfer laser system are discussed. Experimental and theoretical rate coefficient literature is reviewed and the most probable rates are selected for the kinetic model of the reaction system. Results of computer experiments show the relative importance of these reactions for pulsed laser simulation... View full abstract»

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  • TA1 - A CW-CO chemical laser from the reaction of active nitrogen with O2+ CS2

    Publication Year: 1973, Page(s):114 - 116
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (884 KB)

    A CW-CO chemical laser has been produced in a fast-flow system by mixing N, O2, and CS2. The power output and spectral characteristics are similar to the O plus CS2system indicating that the final reaction steps are the same. Experimental and analytical evidence are presented to support the initiating step N + CS2→ CS + NS followed by NS + N →... View full abstract»

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  • TA8 - Gain measurements on CO P-branch transitions in a C2H2-O2flame

    Publication Year: 1973, Page(s):116 - 120
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1822 KB)

    Optical gain was detected in the CO X1Sigma+infrared transitionsP_{9-8}(12)andP_{8-7}(12)in a 4.6-cm-long free-burning C2H2-O2flame. At a total pressure of 11-torr gain (or loss) on theP_{9-8}(12), transition was measured in the preflame, visible flame, and postflame zones of fuel-lean flames. View full abstract»

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  • TA9 - Time-dependent calculations of carbon monoxide laser kinetics

    Publication Year: 1973, Page(s):120 - 129
    Cited by:  Papers (76)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2914 KB)

    We report here calculations of pulsed CO laser operation by revealing the time evolution of the CO vibrational distribution function in electrically pumped CO-N2-He mixtures. This is accomplished through a time-dependent solution of the coupled rate equations for the first 50 vibrational levels of CO considering V-V and V-T processes, spontaneous and stimulated emission, electron impact... View full abstract»

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  • WA1 - Far-infrared molecular lasers

    Publication Year: 1973, Page(s):130 - 138
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2778 KB)

    A summory is presented of recent accomplishments and the state of the art of far-infrared (far-IR) molecular lasers. Problems of excitation, laser line assignments, relaxation, and absolute frequency measurements are discussed. Predictions of future far-IR developments are made. View full abstract»

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  • WA2--Comparison of theory and experiment for a transversely excited high-pressure CO2laser

    Publication Year: 1973, Page(s):139 - 153
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4267 KB)

    Small-signal gain and laser output power have been measured as a function of time for a pin-resistor transversely excited atmospheric (TEA) CO2laser gain device. Both fixed-mirror andQ-switched rotating-mirror laser cavities were studied. A set of coupled differential equations describing the mechanisms underlying gain and lasing behavior are presented. Electrical excitation ... View full abstract»

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  • WA4--Intracavity breakdown in CO and CO2lasers

    Publication Year: 1973, Page(s):154 - 157
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1158 KB)

    The threshold for intracavity breakdown in large CO and CO2lasers has been calculated from solutions for the electron-energy distribution function as a function of incident laser flux. For fluxes of high intensity and short duration, a threshold fluence offt_{p} = 1J/cm2for He/N2/CO2mixtures andft_{p} approx 4J/cm2for He/... View full abstract»

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  • WA7--Electron-beam-controlled CO2laser amplifiers

    Publication Year: 1973, Page(s):157 - 163
    Cited by:  Papers (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2543 KB)

    The performance of electron-beam-controlled atmospheric-pressure CO2laser amplifiers is reported. The amplifiers have an active length of 100 cm and a circular optical aperture of 10 cm2. The electrical parameters are 130-kV electron beam energy and 0.15-A/cm2cathode current density over 800 cm2; 20-kV gas pumping voltage and 7-A/cm2gas curren... View full abstract»

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  • WB4--A spectroscopic study of CW chemical lasers

    Publication Year: 1973, Page(s):163 - 172
    Cited by:  Papers (28)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3257 KB)

    A subsonic transverse-flow chemical laser has been instrumented to permit measurements of vibration-rotation state populations and laser output spectra under flow conditions typical of present CW hydrogen halide laser operation. Measurements are presented for the F + HI, F + HBr, F + CH4, F + HCl, F + H2, Cl + HI, and Cl + HBr atom-exchange reaction systems. CW operation was ... View full abstract»

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  • WC8 - Parametric studies of pulsed HF lasers using transverse excitation

    Publication Year: 1973, Page(s):173 - 181
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2618 KB)

    A detailed comparison of four types of electrode structures for HF laser action was made. The HF was produced by transverse discharges through SF6/RH mixtures. The pulse energy, pulse duration, and spectroscopic output were measured as a function of the type of hydrogen donor, its partial pressure as well as the total pressure when He was added. The hydrogen donors used were H2 View full abstract»

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  • Chemical laser device bibliography

    Publication Year: 1973, Page(s):181 - 188
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2471 KB)

    A bibliography of commonly available literature concerning chemical laser devices is presented. The types of laser devices covered are restricted to the three major ones: 1) HF or DF lasers, 2) CO2chemical transfer lasers, and 3) CO lasers. These devices are also restricted to only those which have been shown to be vibrationally excited through chemical reactions. The bibliography conta... View full abstract»

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  • Vibrational relaxation measurements in hydrogen fluoride

    Publication Year: 1973, Page(s): 189
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (454 KB)

    Vibrational relaxation measurements in HF have been obtained at intermediate temperatures by combining the laser induced fluorescence technique with shock compression heating in a shock tube. Usually, shock tube measurements of vibrational relaxation are limited to high temperatures; above about 1300 K in the case of HF. Laser induced fluorescence measurements can be made in heated cells suitable ... View full abstract»

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  • Gain and relaxation studies in transversely excited HF lasers

    Publication Year: 1973, Page(s):189 - 190
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (909 KB)

    The results of measurements of the spatial and temporal dependence of the gain of a pulsed SF6-H2hydrogen fluoride laser are reported and are compared with those for CO2lasers. While the propagation in space of a locally excited gain medium was observed to be comparable for two lasers, the time developments were vastly different. The spatial dependence of the gain ... View full abstract»

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  • Theory of vibrational energy exchange rates in chemical and molecular lasers

    Publication Year: 1973, Page(s): 189
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (454 KB)

    A quantum mechanical theory of near resonant transfer of vibrational energy is formulated and used to calculate energy transfer processes in chemical and molecular lasers. This theory is based on the existence of an exact solution to the pair of coupled differential equations describing the resonant transfer of excitation. The solution to this problem is used as the basis for a distorted wave solu... View full abstract»

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  • VT relaxation in N2and CO

    Publication Year: 1973, Page(s): 189
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (454 KB)

    Using a vibrational pumping technique based on transient stimulated Raman scattering we have measuredptauvalues for VT relaxation of theupsilon = 1levels in N2and CO at room temperature and in the presence of several deactivants; the N2data represent the only room temperature data presently available. A mode-locked ruby laser, delivering picosecond pulse... View full abstract»

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  • Vibrational deactivation of HE in the H2-F2chain reaction

    Publication Year: 1973, Page(s): 189
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (454 KB)

    The population of the excited vibrational states through of hydrogen fluoride has been determined by spectroscopic measurements on a chain reacting mixture of hydrogen and fluorine dilute in helium. The reaction is initiated by partially dissociating the hydrogen molecules with an electric disch... View full abstract»

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  • Velocity preservation--A quantitative technique for determining rates of fast inelastic collision processes

    Publication Year: 1973, Page(s): 190
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    Absorption of monochromatic radiation by a low pressure gas will inieet molecules into a state|Urangle, with one component of velocity specified. Collisions then transfer molecules from this state to other states of interest|s_{i}rangle. The scattering kernelP_{1}(U rightarrow s_{i}, upsilon_{z} rightarrow upsilon_{z}')is proportional to the velocity distribution f... View full abstract»

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  • Cavity and chemical mechanisms in a H2+F2pulsed laser

    Publication Year: 1973, Page(s): 190
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    A computer simulation of a pulsed HF laser pumped by the H2+ F2chain reaction is used to study the interaction of cavity and chemical mechanisms throughout a typical pulse. The reacting mixture contained within an optical cavity is assumed homogeneous and is approximated by a chemical kinetic model. A Boltzmann distribution for the rotational levels is assumed with lasing on ... View full abstract»

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Aims & Scope

The IEEE Journal of Quantum Electronics is dedicated to the publication of manuscripts reporting novel experimental or theoretical results in the broad field of the science and technology of quantum electronics.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Prof. Hon Ki Tsang
Chinese University of Hong Kong