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

Abstract

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.

Keywords

photoacoustic;Doppler;$CO_2$

References

  1. A. L. S. Smith and S. Moffatt, Optics Comm., 30, 2(1979)
  2. Jitendra P. Gupta and Rajendra N. Sachdev, Appl. Phys. Lett. 36(12), 960 (1980) https://doi.org/10.1063/1.91382
  3. Kirk H. Michaelian, 'Photoacoustic Infrared Spectroscopy,' WileyInterscience, 168 (2003)
  4. A. Thony and M. W. Sigrist, Infrared Phys. Technol. Vol. 36, No.2, 585 (1995) https://doi.org/10.1016/1350-4495(94)00046-N
  5. H. W. Jentink, F. F. M. de Mul, H. E. Suichies, J. G. Aarnoudse, and J. Greve, Vol. 27, No. 2, 379(1988) https://doi.org/10.1364/AO.27.000379
  6. M. J. Rudd, J. Phys. E 1, 723(1968) https://doi.org/10.1088/0022-3735/1/7/305
  7. S. Shimohara, A. Mochizuki, H. Yoshida, and Masao Sumi, Applied Optics, 25, 9, 1417(1986) https://doi.org/10.1364/AO.25.001417
  8. James H. Churnside, Applied Optics, 23, 1, 61(1984) https://doi.org/10.1364/AO.23.000061
  9. Jong-Woon Choi, Young-Pyung Kim, and Youn-Myung Kim, Vol. 68, No. 12, 4623-4624, Review of Scientific Instruments, Dec. (1997) https://doi.org/10.1063/1.1148445
  10. Jong-Woon Choi, Young-Pyung Kim, and Youn-Myung Kim, US PATENT, 08/689,269 (1996)
  11. R. B. Green, R. A. Keller, G. G. Luther P. K. Schenck, and J C. Travis, Appl, Phys. Lett. 29, 747(1976)
  12. Toyoichi Tanaka, George B. Benedek, Applied Optics, 14, 1(1975) https://doi.org/10.1364/AO.14.000001
  13. Photoacoustic Infrared Spectroscopy Kirk H.Michaelian