Optoelectronics Letters, Volume. 11, Issue 3, 222(2015)
All-digital demodulation system of interferometric fiber optic sensors using an improved PGC algorithm based on fundamental frequency mixing
We present an all-digital demodulation system of interferometric fiber optic sensor based on an improved arctangent- differential-self-multiplying (arctan-DSM) algorithm. The total harmonic distortion (THD) and the light intensity disturbance (LID) are also suppressed, the same as those in the traditional arctan-DSM algorithm. Moreover, the lowest sampling frequency is also reduced by introducing anti-aliasing filter, so the occupation of the system memory is reduced. The simulations show that the improved algorithm can correctly demodulate cosine signal and chirp signal with lower sampling frequency.
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ZHANG Ai-ling, WANG Kai-han, ZHANG Shuai, WANG Yan. All-digital demodulation system of interferometric fiber optic sensors using an improved PGC algorithm based on fundamental frequency mixing[J]. Optoelectronics Letters, 2015, 11(3): 222
Received: Dec. 15, 2014
Accepted: --
Published Online: Oct. 12, 2017
The Author Email: Kai-han WANG (alzhang2012@163.com)