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Proceedings Paper

Optical frequency domain reflectometry based fiber Bragg grating vibration sensor array using sinusoidal current modulation of laser diodes
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Paper Abstract

We present multipoint vibration sensing using fiber Bragg gratings and optical frequency domain refrectometry (OFDR). In OFDR based method, the maximum number of arrayed sensor can be few thousands and the measurement time is determined by wavelength scanning rate of a light source. In our sensor system, a laser diode is used as a wavelength scanning light source. Lasing wavelength of a laser diode can be modulated by changing its injection current. The injection current can be precisely modulated at high frequency up to 1 MHz using a laser-diode controller and wavelength scanning can be then easily achieved with a laser diode.

Paper Details

Date Published: 28 September 2015
PDF: 4 pages
Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96341F (28 September 2015); doi: 10.1117/12.2194688
Show Author Affiliations
Atsushi Wada, National Defense Academy (Japan)
Satoshi Tanaka, National Defense Academy (Japan)
Nobuaki Takahashi, National Defense Academy (Japan)

Published in SPIE Proceedings Vol. 9634:
24th International Conference on Optical Fibre Sensors
Hypolito José Kalinowski; José Luís Fabris; Wojtek J. Bock, Editor(s)

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