Experimental and Theoretical Investigation of Laser Medium in a Grid-Nozzle Multi-Kw Supersonic Chemical Oxygen Iodine Laser

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Laser medium parameters of a multi-kW grid-nozzle supersonic Chemical Oxygen Iodine Laser (COIL) were studied both experimentally and theoretically. Small signal gain (SSG) diagnostics were performed using a narrow line-width tunable laser by scanning a 1 GHz range around the (2P1/2)–(2P3/2) spin-orbit transition line of atomic iodine. Numerical simulation was employed to obtain the gain distribution along the optical axis, yield of singlet oxygen, iodine dissociation fraction and the temperature inside the laser cavity. Almost all the input parameters for the simulation were taken from the experimental data. The bulk of the singlet oxygen is found to be deactivated by the iodine jet, while the yield at the Nozzle Exit Plane (NEP) is found to be half of that in the subsonic area. Simulation also showed that 90% of molecular iodine is dissociated at the nozzle throat. Gain along the optical axis appeared to be non-uniform, and included absorption regions. The experimentally measured maximum gain value was found to be 0.26 m-1.

収録刊行物

  • Japanese journal of applied physics. Pt. 1, Regular papers & short notes

    Japanese journal of applied physics. Pt. 1, Regular papers & short notes 43(9A), 6088-6092, 2004-09-15

    Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physics

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各種コード

  • NII論文ID(NAID)
    10013573552
  • NII書誌ID(NCID)
    AA10457675
  • 本文言語コード
    EN
  • 資料種別
    ART
  • 雑誌種別
    大学紀要
  • ISSN
    0021-4922
  • NDL 記事登録ID
    7079421
  • NDL 雑誌分類
    ZM35(科学技術--物理学)
  • NDL 請求記号
    Z53-A375
  • データ提供元
    CJP書誌  NDL  J-STAGE  JSAP 
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