NOVEL ASPECTS OF THE OPTOGALVANIC EFFECT IN THE CO2-LASER MEDIUM

被引：2
|
作者：
TACHIKAWA, M [1 ]
MURAKAMI, H [1 ]
SHIMIZU, FO [1 ]
SHIMIZU, T [1 ]
机构：
[1] SOPHIA UNIV,FAC SCI & TECHNOL,DEPT PHYS,CHIYODA KU,TOKYO 102,JAPAN
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1990年 / 29卷 / 05期
关键词：
C02; laser; Optogalvanic effect; Vibration-to-translation energy exchange; Vibrational relaxation;
D O I：
10.1143/JJAP.29.958
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Dynamic properties of the optogalvanic signal in the CO2 laser medium are investigated as functions of the modulation frequency of the incident laser beam and the gas pressure. It is determined that a positive optogalvanle effect occurs in the gain medium when the gas pressure is sufficiently low, while a negative optogalvanic effect occurs at higher gas pressures. The mechanism of the signal inversion is explained by the competition between the collisional relaxation process and the spontaneous emission from the upper laser level. © 1990 The Japan Society of Applied Physics.
引用
收藏
页码：958 / 962
页数：5
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