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Improved phase generated carrier demodulation algorithm for eliminating light intensity disturbance and phase modulation amplitude variation |
Applied Optics, Vol. 51, Issue 29, pp. 6962-6967 (2012)
http://dx.doi.org/10.1364/AO.51.006962
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Abstract
In this paper we propose a novel, improved, phase generated carrier (PGC) demodulation algorithm based on the PGC-differential-cross-multiplying approach (PGC-DCM). The influence of phase modulation amplitude variation and light intensity disturbance (LID) on traditional PGC demodulation algorithms is analyzed theoretically and experimentally. An experimental system for remote no-contact microvibration measurement is set up to confirm the stability of the improved PGC algorithm with LID. In the experiment, when the LID with a frequency of 50 Hz and the depth of 0.3 is applied, the signal-to-noise and distortion ratio (SINAD) of the improved PGC algorithm is 19 dB, higher than the SINAD of the PGC-DCM algorithm, which is 8.7 dB.
© 2012 Optical Society of America
OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
ToC Category:
Instrumentation, Measurement, and Metrology
History
Original Manuscript: June 26, 2012
Revised Manuscript: September 4, 2012
Manuscript Accepted: September 4, 2012
Published: October 5, 2012
Citation
Youwan Tong, Hualin Zeng, Liyan Li, and Yan Zhou, "Improved phase generated carrier demodulation algorithm for eliminating light intensity disturbance and phase modulation amplitude variation," Appl. Opt. 51, 6962-6967 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-29-6962
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