Vol. 40, Issue 4, pp. 909-919

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  2. Optica Applicata Vol. 40, Issue 4, pp. 909-919 (2010)
Vol. 40 Issue 4 pp. 909-919

Acoustic mapping of the back-scattering interferometer signal in a CO2 laser

Dorota A. Wojaczek, Pawel Chodorowski, Andrzej B. Dobrucki, Jerzy S. Witkowski, Edward F. Plinski

Keywords

CO2 laser, self-mixing, optical feedback, back-scattering, interferometer, photoacoustics

Abstract

It is shown that a microphone placed in the laser plasma can be used for detection and observation of the optical phenomenon such as an optical feedback in a continuous wave regime of the laser operation. To observe the effect, a periodically moved external mirror has been used. The periodical changes of the optical beam intensity in the laser cavity generated changes in frequency and amplitude of the acoustic signal. In conclusion, the acoustic wave gives information about optical effects created in a waveguide CO2 laser.

Vol. 40
Issue 4
pp. 909-919

1.54 MB
OPTICA APPLICATA - a quarterly of the Wrocław University of Science and Technology, Faculty of Fundamental Problems of Technology