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Compensation of temperature-induced fluctuation in fiber-Bragg-grating vibration sensor by using feedback control of source wavelength

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4 Author(s)
Takahashi, N. ; Dept. of Commun. Eng., Nat. Defense Acad., Kanagawa, Japan ; Thongnum, W. ; Ogawa, T. ; Tanaka, S.

The operation of a fiber Bragg grating (FBG) vibration sensor, which is based on the intensity-modulation method, is stabilized by compensating the fluctuation of the sensitivity induced by the environmental temperature change. The compensation is realized by controlling the oscillation wavelength of the source laser with a feedback circuit so that the operation point on the FBG transmittance spectrum curve should remain the same regardless of the temperature change. The variation of the sensitivity is reduced to as small as 1 dB over the temperature range from -15 to 50 degrees Celsius, although it is more than 60 dB without the stabilization.

Published in:
Microwave and Optoelectronics Conference, 2003. IMOC 2003. Proceedings of the 2003 SBMO/IEEE MTT-S International  (Volume:2 )

Date of Conference: 20-23 Sept. 2003

Page(s):
893 - 896 vol.2
Print ISBN:
0-7803-7824-5
INSPEC Accession Number:
7870061
Digital Object Identifier :
10.1109/IMOC.2003.1242699
Product Type:
Conference Publications

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