Optogalvanic Effect Study of Vibrational Relaxation in CO_2 Laser Process

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概要

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• The amplitude and phase retardation of the optogalvanic signal in a CO_2-N_2-He laser plasma irradiated by a 10.6 μm CO_2 laser were measured under various experimental conditions. It is shown that the mechanism of the optogalvanic effect is related to the vibrational relaxation processes of the laser levels. The collisional rate constant relevant to the upper Baser level (001) is determined as (2.6±0.5)×10^2/Torr・s at 300 K. Good agreement is obtained between the present value and the value previously obtained by the infrared pulse gain method. A new model for the optogalvanic effect is proposed, taking three relaxation processes into consideration. The dependence of the optogalvanic effect on the pressure and modulation frequency is calculated using this model and a reasonable set of parameters, and shows good agreement with the observations.

• 社団法人応用物理学会の論文
• 1983-07-20

著者

• Ueda Kenichi

  Department Of Physics Faculty Of Science And Technology Sophia University:(present Address)insitute

• Ueda Kenichi

  Department Of Physics Faculty Of Science And Technology Sophia University:(present Address)institute

• Sasaki Koji

  Department Of Pharmacology Kitasato University School Of Medicine

• SHIMIU Fumiko

  Department of Physics, Faculty of Science and Technology, Sophia University

• Shimiu Fumiko

  Department Of Physics Faculty Of Science And Technology Sophia University

• Sasaki Koji

  Department Of Physics Faculty Of Science And Technology Sophia University:(present Address)fiber Opt

• Sasaki Koji

  Department Of Internal Medicine Keio University

• Ueda Kenichi

  Department Of Anesthesia University Of Iowa Hospitals And Clinics

• SASAKI Koji

  Department of Internal Medicine , Keio University

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