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Proceedings Paper

The micro-vibration amplitude measuring method with suppressing peak-to-peak drift in PGC demodulation algorithm
Author(s): Fei Liu; Shenglai Zhen; Mei Zhou; Gang Zhang; Liang Lv; Jun Peng; Benli Yu
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Paper Abstract

In order to suppress peak-to-peak drift in traditional phase generated carrier (PGC) demodulation, a novel ameliorated PGC demodulation algorithm based on differentiate and cross multiply demodulation (DCM) and sum of squares of orthogonal signals is proposed in this paper. This improvement has several advantages compared with the traditional PGC algorithm. The drift of the light power is eliminated and will not be transferred to the output. The noise from the light power is reduced much at the same time. Experimental results established by using dual-channel balancing detection technology and digital demodulation have confirmed the low intensity noise of the ameliorated PGC algorithm as expected as the theoretical analysis. The peak-to-peak value drift in the ameliorated PGC demodulation has been suppressed effectively. According to the experimental results, the demodulated amplitude and the test signal amplitude assumes certain linear relationship. The conclusion has the important reference significance to improve the performance of the system.

Paper Details

Date Published: 23 November 2011
PDF: 7 pages
Proc. SPIE 8199, 2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 81990H (23 November 2011); doi: 10.1117/12.904822
Show Author Affiliations
Fei Liu, Anhui Univ. (China)
Shenglai Zhen, Beijing Micro-Technology Research Institute (China)
Mei Zhou, Anhui Univ. (China)
Gang Zhang, Anhui Univ. (China)
Liang Lv, Anhui Univ. (China)
Jun Peng, Beijing Micro-Technology Research Institute (China)
Benli Yu, Anhui Univ. (China)


Published in SPIE Proceedings Vol. 8199:
2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications
Brian Culshaw; YanBiao Liao; Anbo Wang; Xiaoyi Bao; Xudong Fan, Editor(s)

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