Title :
PSEUDO WORKING-POINT CONTROL DETECTION SCHEME FOR INTERFEROMETRIC FIBER-OPTIC SENSORS
Author :
Zefeng Wang ; Hong Luo ; Shuidong Xiong ; Yongming Hu
Author_Institution :
Coll. of Photoelectric Sci. & Eng., Nat. Univ. of Defence Technol., ChangShang
Abstract :
A novel pseudo working-point control detection scheme for interferometric fiber-optic sensors is reported. The principles are introduced in details. An experimental system, which interrogates an interferometric fiber optic hydrophone with this new method, is designed. The acoustic pressure phase sensitivity is about -162 dB re 1 rad / muPa over the frequency range of 20 Hz to 2.5 kHz with a fluctuation lower than plusmn1.0 dB, which accords well with the results obtained using the method of PGC demodulation. The experimental results prove this method is feasible. It has the advantages of no electric elements in the sensing head, the simplicity of signal processing and the wide frequency range of signal detection
Keywords :
acoustic signal detection; fibre optic sensors; hydrophones; PGC demodulation; acoustic pressure phase sensitivity; interferometric fiber optic hydrophone; interferometric fiber-optic sensors; pseudo working-point control detection scheme; signal detection; signal processing; Acoustic sensors; Acoustic signal detection; Design methodology; Fluctuations; Frequency; Optical design; Optical fiber sensors; Optical fibers; Optical interferometry; Sonar equipment;
Conference_Titel :
Signal Processing, 2006 8th International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-9736-3
Electronic_ISBN :
0-7803-9736-3
DOI :
10.1109/ICOSP.2006.346046
