[OPTICAL REVIEW Vol. 8, No. 2 (2001) 107-111]

Multiplexed Optical Fiber Interferometric Sensor System by Synthesis of Optical Coherence Function with Phase Generated Carrier

Bing ZHU1 and Kazuo HOTATE2,*

1Department of Electronic Engineering, School of Engineering, 2Department of Frontier Informatics, Graduate School of Frontier Sciences, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8656 Japan

(Received September 22, 2000; Accepted January 6, 2001)

A novel system for multiplexed optical fiber interferometric sensors is proposed applying the synthesis of optical coherence function with phase generated carriers. The ideal parameters of the laser diode frequency modulation for the phase generated carrier with the synthesis of the optical coherence function are discussed. A basic experimental setup including two interferometric sensors is constructed. The results show that the phase signal from the two sensors can successfully be demultiplexed by scanning the synthesized coherence peak.

Key words : fiber optic interferometer, sensor multiplexing, phase generated carrier, optical coherence function