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Proceedings Paper

Polarimetric heterodyning fiber grating laser sensors
Author(s): Bai-Ou Guan; Yang Zhang; Yan-Nan Tan; Tuan Guo; Hwa-Yaw Tam
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Paper Abstract

Fiber grating laser sensors have been attracting interest because of their high signal-to-noise ratio and narrow linewidth that permit high resolution sensing. According to the working principle, fiber grating laser sensors can be classified into two types: wavelength encoding sensor and polarimetric heterodyning sensor. The former converts measurrand into shift in the operation wavelength of the fiber laser, which is similar to that of fiber grating sensor. The latter converts measurrant into change in beat frequency between the two orthogonal polarization modes from the laser. Because the beat frequency is in radio frequency (RF) range, the polarimetric heterodyning sensor has distinctive advantages of ease of interrogation and avoidance of expensive wavelength measurement that is required for wavelength encoding sensors. In this paper, we report some of our recent works in fabrication of dual-polarization fiber grating lasers, development of polarimetric heterodyning fiber grating laser sensors for measurement of acoustic wave, acceleration, lateral force, displacement, electric current and hydrostatic pressure, and sensor multiplexing in RF domain.

Paper Details

Date Published: 16 May 2011
PDF: 16 pages
Proc. SPIE 8034, Photonic Microdevices/Microstructures for Sensing III, 80340G (16 May 2011); doi: 10.1117/12.883785
Show Author Affiliations
Bai-Ou Guan, Jinan Univ. (China)
Yang Zhang, PolyU-DUT Joint Research Ctr. For Photonics, Dalian Univ. of Technology (China)
Yan-Nan Tan, PolyU-DUT Joint Research Ctr. For Photonics, Dalian Univ. of Technology (China)
Tuan Guo, Jinan Univ. (China)
Hwa-Yaw Tam, The Hong Kong Polytechnic Univ. (Hong Kong, China)

Published in SPIE Proceedings Vol. 8034:
Photonic Microdevices/Microstructures for Sensing III
Hai Xiao; Xudong Fan; Anbo Wang, Editor(s)

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