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A novel demodulation technique for the wavelength shift of fiber Bragg grating sensors using the I/Q signal processing scheme

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4 Author(s)
Sung Chul Kang ; Sch. of Electr. Eng., Seoul Nat. Univ., South Korea ; Sang Bae Lee ; Sang Sam Choi ; Byoungho Lee

We introduce a novel scheme to obtain the I/Q signals optically using a dual head fiber Bragg grating (FBG) sensor and an optical-path-controlled Mach-Zehnder interferometer. Using the scheme as a demodulator for the FBG sensor, intensity-based measurement of dynamic strain was experimentally demonstrated.

Published in:

Lasers and Electro-Optics, 1999. CLEO/Pacific Rim '99. The Pacific Rim Conference on  (Volume:2 )

Date of Conference:

Aug. 30 1999-Sept. 3 1999