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Proceedings Paper

Laser diode noise impact on performance of laser Doppler velocimeter
Author(s): Lesya Blagova; Bob Ebrahim; Alex J. Gluzmann; Ivan Popov
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Paper 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.

Paper Details

Date Published: 15 December 2003
PDF: 7 pages
Proc. SPIE 5260, Applications of Photonic Technology 6, (15 December 2003); doi: 10.1117/12.543400
Show Author Affiliations
Lesya Blagova, George Kelk Corp. (Canada)
Bob Ebrahim, George Kelk Corp. (Canada)
Alex J. Gluzmann, George Kelk Corp. (Canada)
Ivan Popov, George Kelk Corp. (Canada)


Published in SPIE Proceedings Vol. 5260:
Applications of Photonic Technology 6
Roger A. Lessard; George A. Lampropoulos, Editor(s)

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