Laser diode noise impact on performance of laser Doppler velocimeter

Lesya Blagova; Bob Ebrahim; Alex J. Gluzmann; Ivan Popov

doi:10.1117/12.543400

15 December 2003 Laser diode noise impact on performance of laser Doppler velocimeter

Lesya Blagova, Bob Ebrahim, Alex J. Gluzmann, Ivan Popov

Proceedings Volume 5260, Applications of Photonic Technology 6; (2003) https://doi.org/10.1117/12.543400
Event: Applications of Photonic Technology, 2003, Quebec City, Québec, Canada

Abstract

Laser diode intensity noise as a function of laser current and temperature is studied. It is shown that the intensity noise in current-temperature coordinates forms "islands" amid larger area of relatively low-noise operation. Although these "islands" of noise are showing some movement in time, generally it is possible to find an operational point characterized by long-term low noise. We show also that laser noise deteriorates signal-to-noise ratio (SNR) in photodiode circuit causing random fluctuations of SNR. The comparison of noise distributions for isolated laser module and the laser incorporated into Doppler velocimeter gauge allowed us to reveal design faults contributing to back reflection and enhancing the noise.

Citation Download Citation

Lesya Blagova, Bob Ebrahim, Alex J. Gluzmann, and Ivan Popov "Laser diode noise impact on performance of laser Doppler velocimeter", Proc. SPIE 5260, Applications of Photonic Technology 6, (15 December 2003); https://doi.org/10.1117/12.543400

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