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Proceedings Paper

Multiplexed long-length fiber Bragg grating distributed sensors based on synthesis of optical coherence function
Author(s): Koji Kajiwara; Kazuo Hotate
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Paper Abstract

Recently, we have reported a scheme for measuring Bragg-wavelength distribution inside a long-length fiber Bragg grating using synthesis of optical coherence function, which is one of the reflectometry techniques based on interferometer and heterodyne detection with an optical frequency-shifter and an electronic band-pass filter. However, the system did not have enough measurement range since it measured the distribution with only one grating. For extending the range, long-length FBG sensors are multiplexed and distribution in each grating is measured. In the process of multiplexing FBGs, a scheme for compensating the beat frequency shift due to the high speed sweep of the optical center frequency of the light source is introduced in the system.

Paper Details

Date Published: 5 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75032J (5 October 2009); doi: 10.1117/12.835249
Show Author Affiliations
Koji Kajiwara, The Univ. of Tokyo (Japan)
Kazuo Hotate, The Univ. of Tokyo (Japan)


Published in SPIE Proceedings Vol. 7503:
20th International Conference on Optical Fibre Sensors
Julian D. C. Jones, Editor(s)

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