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

Atsushi Wada; Satoshi Tanaka; Nobuaki Takahashi

doi:10.1117/12.2194688

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28 September 2015 Optical frequency domain reflectometry based fiber Bragg grating vibration sensor array using sinusoidal current modulation of laser diodes

Atsushi Wada, Satoshi Tanaka, Nobuaki Takahashi

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Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 96341F (2015) https://doi.org/10.1117/12.2194688
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil

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.

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Atsushi Wada, Satoshi Tanaka, and Nobuaki Takahashi "Optical frequency domain reflectometry based fiber Bragg grating vibration sensor array using sinusoidal current modulation of laser diodes", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96341F (28 September 2015); https://doi.org/10.1117/12.2194688

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