Laser Doppler Velocimetry Using the Photoacoustic Effect of $CO_2$ Laser

광음향 효과를 이용한 $CO_2$ 레이저 도플러 속도 측정기

  • 최종운 (호남대 공대 정보통신공학과) ;
  • 유문종 (호남대 공대 광통신공학과)
  • Published : 2004.01.01


A new laser Doppler velocimeter employing a $CO_2$ laser has been developed by using its photoacoustic effect. A change in the pressure of a discharge, induced by mixing of a returned wave with an originally existing wave inside the cavity, is employed to detect the Doppler frequency shift. We found that a Doppler frequency shift as much as 34 KHz was detected, and also a good linear relationship between the velocity and the Doppler frequency shift was obtained.




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