Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/7453
Title: Polarimetric heterodyning fiber laser sensor for directional acoustic signal measurement
Authors: Lyu, C
Wu, C
Tam, HY 
Lu, C 
Ma, J
Issue Date: 2013
Publisher: Optical Society of America
Source: Optics express, 2013, v. 21, no. 15, p. 18273-18280 How to cite?
Journal: Optics express 
Abstract: A DBR fiber grating laser acoustic sensor based on polarization beat signal modulation analysis has been demonstrated for directional acoustic signal measurement. The acoustic sensor was fabricated in birefringent erbium-doped fiber, and the influences of external-acoustic pressure on fiber grating laser sensor were analyzed, considering the effect of relative orientation of the acoustic wave on the degrees of birefringence modulation. In experiment, the birefringence in sensing fiber was modulated by ultrasonic pressure. Agreement between theoretical and experimental results was obtained for ultrasound wave propagating from different directions (0-360 degrees in 15 degrees intervals) corresponding to a nonlinearly change in beat frequency modulation rates. The results demonstrate that the DBR fiber grating laser acoustic sensor has an orientation recognizable ability, offering a potential for acoustic vector signal detection.
URI: http://hdl.handle.net/10397/7453
EISSN: 1094-4087
DOI: 10.1364/OE.21.018273
Appears in Collections:Journal/Magazine Article

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