Laser doppler velocimetry using the optogalvanic effect of $Co_2$ laser

광전류 효과를 이용한 $Co_2$ 레이저 도플러 속도 측정기

  • Published : 1997.12.01

Abstract

A new laser Doppler velocimeter employing a $CO_2$laser has been developed by using its optogalvanic effect. A change in the electric impedance of a discharge, induced by mixing of a returned wave with an originally existing wave inside the cavity, was employed to detect the Doppler frequency shift. A Doppler frequency shift as much as 60 KHz was detected, and also a good linear relationship between the velocity and the Doppler frequency shift was obtained.

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References

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