Self-compensated high-pressure sensor with a high-birefringence fiber Bragg grating and a bulk modulus

Yong Zhao; Mingguo Zhao; Jian Yang

doi:10.1117/1.1828470

1 January 2005 Self-compensated high-pressure sensor with a high-birefringence fiber Bragg grating and a bulk modulus

Yong Zhao, Mingguo Zhao, Jian Yang

Author Affiliations +

Optical Engineering, Vol. 44, Issue 1, 014401 (January 2005). https://doi.org/10.1117/1.1828470

Abstract

High-pressure measurement is made by demodulating Bragg grating peak splitting caused by transverse stress differences in the core of a high-birefringence (HB) single-mode fiber, which is bonded on the exterior surface of a free active element bulk modulus. The two orthogonally polarized signals reflected from the HB fiber Bragg grating (FBG) can be independently detected with a simple FBG interrogation system, which is based on the light intensity measurement method. In addition, the cross-sensitivity of the FBG sensor can be self-compensated by this method. The measurement principle is introduced, and preliminary experimental results indicate that the measurement sensitivity is estimated to be ~12 pm/N in a linear measurement range from 0 to 120 N.

©(2005) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Yong Zhao, Mingguo Zhao, and Jian Yang "Self-compensated high-pressure sensor with a high-birefringence fiber Bragg grating and a bulk modulus," Optical Engineering 44(1), 014401 (1 January 2005). https://doi.org/10.1117/1.1828470

Published: 1 January 2005

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KEYWORDS

Fiber Bragg gratings

Sensors

Polarization

Transducers

Signal detection

Optical testing

Refractive index

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