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Proceedings Paper

Performance analysis of a time-division-multiplexed fiber Bragg grating sensor
Author(s): Calvin C.K. Chan; Wei Jin; M. Suleyman Demokan
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Paper Abstract

The results of an investigation of the performance of a time-division-multiplexed fiber Bragg grating (FBG) sensor array using a tunable laser source are reported. The system performance is found to be limited by the extinction ratio of the optical pulse modulator used for pulse amplitude modulation. Formulas that relate the crosstalk to the extinction ratio of the optical pulse modulator, the modulation parameters of the tunable laser, and the optical path differences among sensing channels are derived. Computer simulation shows that an array of 20 FBG sensors with 3 (mu) (epsilon) resolution can be realized with a commercially available single Mach-Zehnder type optical pulse modulator of -35 dB extinction ratio.

Paper Details

Date Published: 31 August 2000
PDF: 12 pages
Proc. SPIE 4074, Applications of Optical Fiber Sensors, (31 August 2000); doi: 10.1117/12.397910
Show Author Affiliations
Calvin C.K. Chan, Hong Kong Polytechnic Univ. (Hong Kong)
Wei Jin, Hong Kong Polytechnic Univ. (Hong Kong)
M. Suleyman Demokan, Hong Kong Polytechnic Univ. (Hong Kong)


Published in SPIE Proceedings Vol. 4074:
Applications of Optical Fiber Sensors
Alan J. Rogers, Editor(s)

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