Title :
16-Channel Fiber Laser Sensing System Based on Phase Generated Carrier Algorithm
Author :
Gaosheng Fang ; Tuanwei Xu ; Fang Li
Author_Institution :
Optoelectron. Syst. Lab., Inst. of Semicond., Beijing, China
Abstract :
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 .
Keywords :
demodulation; fibre lasers; fibre optic sensors; optical crosstalk; space division multiplexing; virtual instrumentation; wavelength division multiplexing; 16-channel fiber laser sensing system; LabView; bandwidth 10 Hz; bandwidth 100 Hz; correlation coefficient; crosstalk; dc block technology; four-space division multiplexing; four-wavelength division multiplexing; fringe visibility; light intensity; multichannel demodulation; normalization technology; phase generated carrier algorithm; point-by-point calculation; real-time synchronous demodulation; wavelength shift resolution; Demodulation; Fiber lasers; Optical fiber networks; Optical fiber sensors; Optical fibers; Real-time systems; Fiber laser sensing; PGC; real-time demodulation;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2013.2282400
