Acta Optica Sinica, Volume. 7, Issue 8, 743(1987)
Investigation of optic-electro-modulation-feedback laser Doppler anemometer
In this paper a new laser doppler anemometer (LDA), optic-electro-moduidtion-feedback LDA (OEMF-LDA), has beed described. In this system the optical components and electronic components are combined in a closed-loop by means of feedback signal which drives two Bragg cells to introduce a changable frequency difference between the two laser beams. The signal-to-noise ratio in this system is much higher than that in a conventional LDA. The frequency response of the OEMF-LDA has been discussed, based on both analysis and experiments.
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SHI SHAOXI, WANG SHIKANG, GUO XIAOMING. Investigation of optic-electro-modulation-feedback laser Doppler anemometer[J]. Acta Optica Sinica, 1987, 7(8): 743