The Review of Laser Engineering
Online ISSN : 1349-6603
Print ISSN : 0387-0200
ISSN-L : 0387-0200
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Volume 12, Issue 11
Displaying 1-8 of 8 articles from this issue
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  • [title in Japanese]
    Toshio INOGUCHI
    1984 Volume 12 Issue 11 Pages 612-613
    Published: November 30, 1984
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.12.612
    JOURNAL FREE ACCESS
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  • Visualization of Supersonic Jets by a Laser Induced Fluorescence Method
    Koji TESHIMA
    1984 Volume 12 Issue 11 Pages 614-623
    Published: November 30, 1984
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.12.614
    JOURNAL FREE ACCESS
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  • An Intra. cavity-Etalon-Tuned TE-CO2 Laser and its Application to FIR Lasers
    Yoshio NISHI, Takahiro ISHIDA, Zhixia ZHANG, Noburu SOKABE, Akira MURA ...
    1984 Volume 12 Issue 11 Pages 624-635
    Published: November 30, 1984
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.12.624
    JOURNAL FREE ACCESS
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    An intracavity-etalon-tuned TE CO2 laser has been constructed using of a Ge etalon of 5mm thickness with a surface reflection of 36%. Frequency tenability and spectral narrowing were examined with an external scanning Fabry-Perot interferometer. When the tilt angle of the etalon was varied so that the resonance frequency shifted across the line center, the observed frequency shifts were approximately one half the calculated values owing to the low finesse of the solid etalon used.
    A spectral width as narrow as 1 GHz (FWHM) was attained when the TE CO2 laser was operated at a total pressure of 300 Torr. Thermal effects in the etalon are also described.
    The TE CO2 laser has been utilized to pump NH3, CH30H and HCOOH far infrared lasers. From the observed frequency shifts of the far infrared lines, it was deduced that Raman scattering was involved.
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  • Measurement of Deflection of Vibrating Mirror by Laser Heterodyne Technique
    Yoshiro SUEMOTO
    1984 Volume 12 Issue 11 Pages 636-643
    Published: November 30, 1984
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.12.636
    JOURNAL FREE ACCESS
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    Measurement of deflection of vibrating mirrors by the laser heterodyne technique is described. The vibrating mirrors were driven by piezoelectric vibrators whose resonant frequencies were 16.5 and 11.6 kHz respectively. The laser heterodyne technique was used for a small vibration amplitude range (the deflection less than O.13μm). The results were compared with those results for a relatively large vibration amplitude range (the deflection about 1μm or less) which were measured by the laser interferometry method. It is shown that both results are consistent with each other and give information about the boundary conditions of the vibrating mirrors when compared with the theoretical deflection of a vibrating disk.
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  • Nitrogen Laser pumped with Two-stage Blumlein Circuit
    Akira YOSHIKAWA, Mayumi MIYAZAWA
    1984 Volume 12 Issue 11 Pages 644-651
    Published: November 30, 1984
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.12.644
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    In order to obtain effective pumping of the UV N2laser, a newly modified Blumlein circuit named Two-stage Blumlein (TB) has been proposed; after the circuit analysis, we designed the TB circuit. Compared with the conventional Blumlein circuit, the TB gives a faster rising discharge current, though it needs an additional set of a spark gap and a charging capacitor; by the use of a 25 cm in length laser tube, the output energy by the TB has been about twice as large as the conventional one.
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  • A Novel Spectrometric Technique based on Fourier Transformation of Transmission Signal of Faraday Rotator
    Kenichi UEDA, Hiroshi TAKUMA
    1984 Volume 12 Issue 11 Pages 652-659
    Published: November 30, 1984
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.12.652
    JOURNAL FREE ACCESS
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    A novel technique of optical spectroscopy based on a new concept is proposed. The principle is to used the dispersion of the Faraday rotation angle by transmitting a beam of light through a medium under a strong axial magnetic field, It is shown that if only the intensity of the component of the beam having one definite direction of polarization is detected, the signal can be expressed as the Fourier transform of the spectrum as a function of the Verdet constant. Thus the present method provides an entirely new and versatile spectroscopic technique which may be called as the Faraday Rotation Fourier Transform Spectroscopy (FRFTS). The resolution depends on the dispersion of the Verdet constant, which is known to be nearly inversely proportional to the square of the frequency, showing incomparably strong contrast to the modest dispersion of the index of refraction, especially in the short wavelength region. Another parameter which determines the resolution is the total number of polarization rotation, which may be limited by the limited available length of the medium due to the absorption of the light in the medium. A Faraday rotator developed in our laboratory is transparent in a wide wavelength range between the near infrared and the ultraviolet, and can be used in the present scheme only if the length were extended, which is of course possible without any technical break-through, indicating the possibility of ultra-high-resolution. Several typical examples are shown by computer simulation and the difference between the FRFTS and the conventional Fourier transform spectroscopy is discussed.
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  • Development of the UV Faraday Rotator
    Hajime NISHIOKA, Hirohiko HISANO, Takeshi KAMINAGA, Kenichi UEDA, Hiro ...
    1984 Volume 12 Issue 11 Pages 660-662
    Published: November 30, 1984
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.12.660
    JOURNAL FREE ACCESS
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    A UV Faraday rotator for the high power KrF laser system and other UV excimer lasers has been developed for the first time. Pure water has high Verdet constant and high transmittance in UV region (up to 190 nm). Ninety degree polarization rotation of a KrF laser beam is obtained by passing through a 5 cm long quartz cell filled by pure water. Quartz rod has also been proved to be equally useful as a Faraday rotator for KrF lasers.
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  • 12th International Laser Radar Conference
    Takao KOBAYASHI
    1984 Volume 12 Issue 11 Pages 663-667
    Published: November 30, 1984
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.12.663
    JOURNAL FREE ACCESS
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