1 July 2015 Multipoint vibration sensing using fiber Bragg gratings and optical frequency domain reflectometry.
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Proceedings Volume 9655, Fifth Asia-Pacific Optical Sensors Conference; 96550U (2015) https://doi.org/10.1117/12.2185268
Event: Fifth Asia Pacific Optical Sensors Conference, 2015, Jeju, Korea, Republic of
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 100 kHz using a laser-diode controller and wavelength scanning can be then easily achieved with a laser diode.
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Atsushi Wada, Atsushi Wada, Satoshi Tanaka, Satoshi Tanaka, Nobuaki Takahashi, Nobuaki Takahashi, } "Multipoint vibration sensing using fiber Bragg gratings and optical frequency domain reflectometry.", Proc. SPIE 9655, Fifth Asia-Pacific Optical Sensors Conference, 96550U (1 July 2015); doi: 10.1117/12.2185268; https://doi.org/10.1117/12.2185268
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