The Review of Laser Engineering
Online ISSN : 1349-6603
Print ISSN : 0387-0200
ISSN-L : 0387-0200
Search
Advanced search
OR
Browse
Search
Volume 10, Issue 5
Displaying 1-11 of 11 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • [title in Japanese]
    Toshiji TAKO
    1982 Volume 10 Issue 5 Pages 449-450
    Published: September 30, 1982
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.10.449
    JOURNAL FREE ACCESS
    Download PDF (153K)
  • High Power Argon Ion Lasers
    Isao KOBAYASHI
    1982 Volume 10 Issue 5 Pages 451-460
    Published: September 30, 1982
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.10.451
    JOURNAL FREE ACCESS
    Download PDF (1012K)
  • Laser Techniques for Diagnostics of High Enthalpy Plasmas
    Yukio WATANABE, Tomoaki IKEGAMI, Masanori AKAZAKI
    1982 Volume 10 Issue 5 Pages 461-478
    Published: September 30, 1982
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.10.461
    JOURNAL FREE ACCESS
    Download PDF (1926K)
  • Effect of Nozzle Geometry on the Performance of 16μm CO2 Gasdynamic Lasers
    Kazuhiko HORIOKA, Hirotai KANAZAWA, Koichi KASUYA
    1982 Volume 10 Issue 5 Pages 479-486
    Published: September 30, 1982
    Released on J-STAGE: July 30, 2010
    DOIhttps://doi.org/10.2184/lsj.10.479
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A rapid expansion nozzle is an essential part of a gasdynamic laser (GDL). Theamount of vibrational energy frozen in the expansion and the cavity gas temperatureare both controlled by the size and shape of the nozzle. These effects on the performance of 16μm-CO2-GDL are examined numerically using a simplified model. It is shown that the nozzle geometry has a very important effect upon its performance.Making use of a mixture of XCO2: XN2: XHe= 2: 1: 7, a maximum small signal gain coefficientof 3.2m-1 and a maximum available power density of 1.3W/cm2 are obtainedunder the condition of P0= 10atm, T0= 1750K with a Me= 6 sharp cornered throatnozzle.
    View full abstract
    Download PDF (856K)
  • Characteristics of Gaseous Saturable Absorbers for a High Power CO2 Laser
    Iwao KITAZIMA, Yukio KYUSHO
    1982 Volume 10 Issue 5 Pages 487-494
    Published: September 30, 1982
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.10.487
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A few measurements were made of the saturation characteristics of the SF6 absorption at the 10.6μm P-branch of CO2 lasers. 1) The observed nonlinear absorption properties can be divided into two characteristic regions, namely P (12)-P (22) and P (24)-P (30), each of which has distinctive features in themeasured transmission as a function of incident radiation intensity. 2) Eitherthe gas pressure effects of SF6, or He and N2 gas additive effects were studiedto increase the contrast ratio for the gain isolation in a CO2 laser system. 3) Theabsorption spectrum was red shifted as the incident radiation intensity was increased. 4) The characteristics of the induced transmission or absorption wer observed by apump-probe technique, at the region of the probe beam P (12)-P (22) or P (24)-P (30), respectively, in coincidence with these of the nonlinear absorption.
    View full abstract
    Download PDF (898K)
  • Silent Discharge CO2 Laser
    Characteristics of Discharge and cw-Oscillation
    Shigenori YAGI, Masaaki TANAKA, Shuji OGAWA, Masaki KUZUMOTO, Norikazu ...
    1982 Volume 10 Issue 5 Pages 495-500
    Published: September 30, 1982
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.10.495
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Laser output from a silent discharge CO2 laser is described by a simple theory combining discharge conditions with optical conditions.
    The differential efficiency (gradient of laser output against discharge power) isfound to be closely relate to the overall excitation efficiency (η′) of CO2 to upperlasing level.
    The experimental finding of η′ with a gas mixture of CO2-CO-N2-He= 8-4-60-28 has been 1.4×1019 particle·J-1. The value of η′ has been observed to increaselinearly with the increase in the N2 mole ratio.
    View full abstract
    Download PDF (579K)
  • Measurement of Radii of Laser Beam Wavefront Curvature Using a One-Dimensional Image Sensor
    Akira SASAKI, Hiroshi NAGATE
    1982 Volume 10 Issue 5 Pages 501-509
    Published: September 30, 1982
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.10.501
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A simple method of measuring the radii of wavefront curvature of He-Ne laser beams is presented. An incident laser beam on a plane parallel plate of glass is reflected at the front and rear surface of the plate, and an interference pattern of reflected two beams is measured with a.one-dimensional image sensor and a microcomputer. The auto-correlation coefficient is computed numerically from the value of the interference pattern signals, and the radii of wavefront curvature are estimated from its coefficient. The propagation property of the radii of wavefront curvature is in approximate agreement with the theory of laser beams. The measured radii are independent on laser amplitude fluctuations and polarization properties of laser beams.
    View full abstract
    Download PDF (912K)
  • High-power Pulsed HCl Chemical Laser
    Mitsuhiro IYODA, Hitoshi SHIMAZAKI, Minoru OBARA, Tomoo FUJIOKA
    1982 Volume 10 Issue 5 Pages 510-517
    Published: September 30, 1982
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.10.510
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A study is reported on the improvement of an output performance of a pulsed HCl chemical laser. Utilizing a low-impedance Blumlein discharge for a mixture of H2 and Cl2, together with an effective prei oni zat i on by corona discharge and/or X-ray, an HCl laser gave a maximum laser energy of 133mJ, which corresponds to a specific laser energy of 0.67 J/1. A numerical analysis predicting the contribution of vibrationally excited H2 to the enhancement of the HCl laser energy is also presented.
    View full abstract
    Download PDF (740K)
  • A Parametric Study of a Blumlein-Type TEA N2 Laser
    Chigusa IWASAKI, Takahisa JITSUNO, Hiroshi OHSUMI, Masashi KOKAWA, Yos ...
    1982 Volume 10 Issue 5 Pages 518-525
    Published: September 30, 1982
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.10.518
    JOURNAL FREE ACCESS
    Download PDF (721K)
  • [title in Japanese]
    1982 Volume 10 Issue 5 Pages 526-545
    Published: September 30, 1982
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.10.526
    JOURNAL FREE ACCESS
    Download PDF (2462K)
  • [title in Japanese]
    1982 Volume 10 Issue 5 Pages 546-547
    Published: September 30, 1982
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.10.546
    JOURNAL FREE ACCESS
    Download PDF (512K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top