The Review of Laser Engineering
Online ISSN : 1349-6603
Print ISSN : 0387-0200
ISSN-L : 0387-0200
Volume 9, Issue 6
Displaying 1-12 of 12 articles from this issue
  • Kiyoshi NAGAI
    1981 Volume 9 Issue 6 Pages 596-597
    Published: November 30, 1981
    Released on J-STAGE: February 26, 2010
    JOURNAL FREE ACCESS
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  • Youichi UEHARA, Wataru SASAKI
    1981 Volume 9 Issue 6 Pages 598-608
    Published: November 30, 1981
    Released on J-STAGE: February 26, 2010
    JOURNAL FREE ACCESS
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  • Minoru YAMADA
    1981 Volume 9 Issue 6 Pages 609-618
    Published: November 30, 1981
    Released on J-STAGE: February 26, 2010
    JOURNAL FREE ACCESS
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  • Takayoshi KOBAYASHI
    1981 Volume 9 Issue 6 Pages 619-628
    Published: November 30, 1981
    Released on J-STAGE: February 26, 2010
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  • Takao EDAHIRO
    1981 Volume 9 Issue 6 Pages 629-637
    Published: November 30, 1981
    Released on J-STAGE: February 26, 2010
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  • Annealing Behavior of Implantation Damages and Deep Levels
    Yoshihiko YUBA, Kenji GAMO, Susumu NAMBA
    1981 Volume 9 Issue 6 Pages 638-646
    Published: November 30, 1981
    Released on J-STAGE: February 26, 2010
    JOURNAL FREE ACCESS
    In order to reveal possible reason responsible for no activation observed in E lowdose implanted GaAs, pulsed ruby laser annealing effects in proton implanted n-typeGaAs and Cr-doped semi-insulating GaAs have been investigate by means of C-V, carrier profile, DLTS and OTCS measurements. In the sample implanted with 30 keV protons to a dose of 1012/cm2, a significant recovery in carrier concentration and adecrease in concentration of implantation induced damage centers were observed after the laser annealing. However damage centers around 5×1015/cm3 still remained. The thickness of fully compensated layer generated by 1014/c2 proton implantation decreased little by the laser annealing. These results suggested that main residual damages in implanted laser annealed GaAs were related with implantation induced damages. A level with an activation energy of 0.86 eV associated with laser irradiation induced damages was detected by OTCS and was considered to locate near the surface.
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  • Laser Characteristics and Outline of a 6kW System
    Mitsuo KASAMATSU, Koichi TSUKAMOTO, Susumu SHIRATORI, Akira OBARA, Fut ...
    1981 Volume 9 Issue 6 Pages 647-657
    Published: November 30, 1981
    Released on J-STAGE: February 26, 2010
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    The many problems appear in laser systems as the increase of output power. These problems and solutions are outlined, and a developed high power TE CO2 Laser system and its characteristics are described.
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  • Malak N MAKAR, Katsunobu NISHIHARA
    1981 Volume 9 Issue 6 Pages 658-667
    Published: November 30, 1981
    Released on J-STAGE: February 26, 2010
    JOURNAL FREE ACCESS
    A stationary, plane geometry flow model gives the form of laser-driven ablation fronts and scaling laws for the dependence of implosion parameters on flux limit parameter, laser wavelength and absorbed intensity. The model includes the ionization energy loss. The solutions are compared with the experimental results. The approximate solutions support both numerical calculations and experimental results.
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  • Yoshiyuki YAMADA, Yoneyoshi KITAGAWA, Izumi TSUDA, Masahiro YOKOYAMA
    1981 Volume 9 Issue 6 Pages 668-675
    Published: November 30, 1981
    Released on J-STAGE: February 26, 2010
    JOURNAL FREE ACCESS
    The interaction between a CO2 laser light and the high temperature plasma produced by dense plasma focus device is investigated experimentally. The absorption of laser light energy more than 50% was observed during the compressed pinch phase, but this absorption energy is not explained simply by the classical inverse bremsstrahlung (-10%). The upper-hybrid resonance absorption is expected in our experiment, because the plasma is pinched by the self-generated magnetic field of MG range. The backscattered energy of the extraordinary wave was reduced below half the value of the ordinary wave. This reduction is explained by the upper-hybrid resonance absorption. The frequency modulation of 4 GHz was observed in the spectrum analysis of the backscattered light. This modulation indicates the existence of the two-stream instability in the pinch plasma.
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  • Kazuhiro WADA, Masaya YASUI, Yasushi UEHARA, Hiromi YAMAGUCHI
    1981 Volume 9 Issue 6 Pages 676-681
    Published: November 30, 1981
    Released on J-STAGE: February 26, 2010
    JOURNAL FREE ACCESS
    A gaseous mixture of BCl3 and Xe (1: 100) is injected onto a Ge substrate at 68 Kto form rare gas solid. The temperature of the solid is raised up to 72.5 K, and the solid is irradiated with chopped infrared beam from a CW CO2 laser, 10-P (20), 944.18cm-1, 2.5W, 110 Hz, 0.5 duty, in order to excite selectively 11BCl2 υ3 vibration. Changes of the vacuum pressure in the system is measured with ionization gauges. The sublimation of the xenon solid is divided into two stages by the order of the vacuum pressure. The pressure is the order of 10-4 Torr in the first stage, and is the order of 10-5 Torr in the second stage. When 11BCl3 is being excited selectively, by cutting the laser beam, the vacuum pressure decreases 10% in the first stage, whereas in the second stage it strangely increases more than 5 %. If the laser frequency is shifted to the off resonant value of the vibration of guest molecules, 9-P (30), 1037.44cm-1, 2.5W, no special change of pressure relating to laser irradiation is observed in the both sublimation stages. From the result of these experiments, it is likely said that in the second stage, the sublimation is suppressed by the selective excitation of the vibration of guest molecules in the xenon solid.
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  • Toshio KISHIMOTO, Etsuo FUJIWARA, Yoshiaki KATO, Chiyoe YAMANAKA
    1981 Volume 9 Issue 6 Pages 682-687
    Published: November 30, 1981
    Released on J-STAGE: February 26, 2010
    JOURNAL FREE ACCESS
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  • 1981 Volume 9 Issue 6 Pages 688-700
    Published: November 30, 1981
    Released on J-STAGE: February 26, 2010
    JOURNAL FREE ACCESS
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