Optical Sensors

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

[+] Author Affiliations
Yong Zhao, Mingguo Zhao, Jian Yang

Tsinghua University, Department of Automation, Beijing 100084, China E-mail: zhaoyong@tsinghua.org.cn

Opt. Eng. 44(1), 014401 (Dec. 27, 2004). doi:10.1117/1.1828470
History: Received Jan. 29, 2004; Revised Jun. 8, 2004; Accepted Jun. 29, 2004; Dec. 27, 2004; Online December 27, 2004
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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.

© 2005 Society of Photo-Optical Instrumentation Engineers

Citation

Yong Zhao ; Mingguo Zhao and Jian Yang
"Self-compensated high-pressure sensor with a high-birefringence fiber Bragg grating and a bulk modulus", Opt. Eng. 44(1), 014401 (Dec. 27, 2004). ; http://dx.doi.org/10.1117/1.1828470


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