16-Channel Fiber Laser Sensing System Based on Phase Generated Carrier Algorithm

A 16-channel fiber laser sensing system based on four wavelength and four space division multiplexing and phase generated carrier (PGC) algorithm is proposed. Through introducing dc block and normalization technology, the influence of light intensity and fringe visibility is decreased. A point-by-po...

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Bibliographic Details
Published in:IEEE photonics technology letters 2013-11, Vol.25 (22), p.2185-2188
Main Authors: Fang, Gaosheng, Xu, Tuanwei, Li, Fang
Format: Article
Language:English
Subjects:
Demodulation
Fiber laser sensing
Fiber lasers
Optical fiber networks
Optical fiber sensors
Optical fibers
PGC
real-time demodulation
Real-time systems
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Summary:A 16-channel fiber laser sensing system based on four wavelength and four space division multiplexing and phase generated carrier (PGC) algorithm is proposed. Through introducing dc block and normalization technology, the influence of light intensity and fringe visibility is decreased. A point-by-point calculation is adopted during PGC processing and we realized 16 channels real-time synchronous demodulation with high performance and stability based on PC and LabView. The wavelength shift resolution of the system is 6×10 -7 pm/√Hz, the linearity is , and the dynamic range is 115 dB at 10 Hz and 98 dB at 100 Hz. For multichannel demodulation, the amplitude consistency is and crosstalk less than -60 dB has been obtained; the correlation coefficient between the real signal and demodulated signal is .
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2013.2282400