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IEEE Journal of Quantum Electronics

Issue 8 • August 1971

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Displaying Results 1 - 14 of 14
  • [Front cover and table of contents]

    Publication Year: 1971, Page(s): 0
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    Freely Available from IEEE
  • Widening of spectral lines in an Ar+laser

    Publication Year: 1971, Page(s):391 - 396
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    In this paper an investigation of the spectral line widths and shifts of Ar I and Ar II lines in argon ion laser plasma is carried out. The discharge-tube internal diameters were 5 and 7 mm, the current densities were 113, 163, and 242 A/cm2, and the pressures were 0.68, 0.42, and 0.23 torr. Approximate calculations were made of ion and electron temperatures, electron density, ion mean ... View full abstract»

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  • Excitation and relaxation in a high-pressure CO laser

    Publication Year: 1971, Page(s):407 - 412
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (667 KB)

    Strong laser emission is reported from a transverse discharge at relatively high pressure in both pure CO and CO-He at room temperature. Calculations of excited population distributions produced by electron CO collisions show an initial distribution that is approximately Boltzmann at a vibrational temperatureT_{upsilon}simeq 6700K. The laser emission spectra exhibit complete inversion. ... View full abstract»

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  • Investigation of tellurium for frequency doubling with CO2lasers

    Publication Year: 1971, Page(s):412 - 416
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (601 KB)

    Second-harmonic generation (SHG) of CO2laser radiation with tellurium has been investigated. The nonlinear coefficient was measured (d_{11} =1.6 times 10^{-6}ESU), as were the peak and average power damage thresholds (2-4 MW/cm2and 150 W/cm2). Finally, the SHG conversion efficiency was found to saturate due to increased absorption of the fundamental. View full abstract»

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  • Nonlinear effects in inorganic liquid lasers

    Publication Year: 1971, Page(s):416 - 424
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1199 KB)

    Inorganic liquids, phosphorous, and selenium oxychlorides, used as solvents for Nd, exhibit a number of nonlinear properties, which may reflect in the performance of liquid lasers. Spontaneous and stimulated Raman scattering have been studied. Measured cross sections and gains indicate that up to power levels of a few hundred megawatts per square centimeter the effect on laser and amplifier proper... View full abstract»

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  • Excited-state absorption of SF6at 936.8 cm-1

    Publication Year: 1971, Page(s):426 - 427
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    An effect that is opposite to saturable absorption in the infrared was observed when a CO2laser beam was passed through SF6. An increase of absorption occurred when the radiant flux of the laser was increased to 10 W/cm2. The effect was observed for the P(28) line of the00deg1-10deg0band of the CO2laser, and was attributed to absorption from e... View full abstract»

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  • High-efficiency driven Q switching of the CO2laser using the stark effect in molecular gases

    Publication Year: 1971, Page(s):427 - 429
    Cited by:  Papers (8)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (467 KB)

    High-efficiency drivenQswitching of the CO2laser has been observed by the use of the Stark effect in CH3Cl, CH3F, CH3CHF2, CH2= CF2, and C2H3Cl on various lines in both the 9.4- and 10.4-μ bands. The effect is observed with both pulsed and sinusoidal electric fields applied to the int... View full abstract»

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  • New xenon laser line observed

    Publication Year: 1971, Page(s): 429
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (102 KB)

    A new xenon laser line was observed. Other parametric data are given. View full abstract»

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  • [Back cover]

    Publication Year: 1971, Page(s): 0
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    Freely Available from IEEE
  • Helium cleanup in the helium-cadmium laser discharge

    Publication Year: 1971, Page(s):425 - 426
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    We have observed a rapid loss of helium from the discharge volume when operating certain types of sealed-off helium-cadmium laser tubes. In severe cases, a loss over a hundred times larger than that possible by diffusion through the glass walls has been observed. Experiments are described indicating that the lost helium is trapped in cadmium, which condenses on the tube walls in the vicinity of th... View full abstract»

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  • Dissociation of carbon dioxide and inversion in CO2laser

    Publication Year: 1971, Page(s):396 - 402
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    The dissociation of carbon dioxide in the CO2laser discharge has been investigated by the infrared absorption method both in flowing and sealed systems. The role of CO2dissociation in creating the population inversion has been clarified. View full abstract»

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  • Two-component-mode filters for optimum single-frequency operation of Nd:YAG lasers

    Publication Year: 1971, Page(s):381 - 387
    Cited by:  Papers (11)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (952 KB)

    Mode filters such as an intracavity tilted Fabry-Perot etalon, or an internal metallic film used to obtain a single-frequency output in the Nd:YAG laser, only work well for relatively short lasers (∼15 cm) and at reduced values of laser gain or output power level. Two new types of mode selectors for such single-frequency operation that largely overcome these difficulties are investigated her... View full abstract»

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  • Gas dynamic CO2-He-(N2) laser investigations

    Publication Year: 1971, Page(s):388 - 391
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    Experiments on IR laser action and gain measurements are reported for a CO2-containing gas mixture flow that cools as a result of expansion. The mixture is preheated by a reflected shock wave, and the gas is expanded into a vacuum through a slit. Laser action is obtained in a CO2-He mixture, while the addition of nitrogen increases the gain. The gain was found to depend on th... View full abstract»

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  • Thermal effects of a continuously pumped Nd3+:YAG laser

    Publication Year: 1971, Page(s):403 - 407
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    Thermal effects in a Nd:YAG laser rod, which is pumped continuously by tungsten iodine lamps, are described. Measurements using a 0.6328-μman probe beam yielded temperature distribution in and at the boundary of the rod. The results of birefringence and focal length are consistent with theoretical treatments, if an effective heat conversion coefficient peculiar to the apparatus is assumed. Th... 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..

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Meet Our Editors

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