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Proceedings Paper

The frequency mixing impact analysis of the light intensity noise with modulation signals in phase generated carrier (PGC) demodulation method
Author(s): Jiaolong Yu; Shenglai Zhen; Xiaoyan Chen; Guowei Tang; Benli Yu
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Paper Abstract

In order to improve the resolution of laser Doppler interferometer, the noise of the system need to be suppressed. Through the analysis of the influence of laser relaxation oscillation mixing with signals in phase generated carrier (PGC) demodulation, we can get a conclusion that the low-frequency part of the laser intensity noise have a greater impact on the signal to noise ratio of PGC demodulation. By using Optoelectronic negative feedback method, we can achieve effective suppression of the low-frequency laser intensity noise and laser relaxation oscillation peak, which reduce the influence of the mixing of the light source intensity noise, and the system signal to noise ratio (SNR) is improved.

Paper Details

Date Published: 30 November 2012
PDF: 10 pages
Proc. SPIE 8561, Advanced Sensor Systems and Applications V, 85611N (30 November 2012); doi: 10.1117/12.2000641
Show Author Affiliations
Jiaolong Yu, Anhui Univ. (China)
Shenglai Zhen, Anhui Univ. (China)
Xiaoyan Chen, Anhui Univ. (China)
Guowei Tang, Anhui Univ. (China)
Benli Yu, Anhui Univ. (China)

Published in SPIE Proceedings Vol. 8561:
Advanced Sensor Systems and Applications V
Brian Culshaw; Yanbiao Liao; Anbo Wang; Xiaoyi Bao; Xudong Fan, Editor(s)

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