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Conferences > OFS > 2020 > W4 > W4.31

Multipoint Vibration Measurement Using Fabry-Perot Interferometers Consisting of Low-reflective Fiber Bragg Gratings Interrogated by Current Modulated Laser Diode

Koki Nakaya, Bui Quoc Hung, Koken Fukushima, Manuel Guterres Soares, Atsushi Wada, and Satoshi Tanaka

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Abstract

We present a multipoint vibration sensing system using fiber Fabry-Perot interferometers consisting of low-reflective fiber Bragg gratings (FBG-FPI) and a current-modulated laser diode. The lasing wavelength of a laser diode can be modulated by changing the injection current. Therefore, high-speed current modulation makes possible to achieve high-speed wavelength sweep exceeding 100 kHz. Using a current modulated laser diode as the source for interrogation of FBG-FPI sensor array, high-speed multipoint vibration measurement can be realized.

© 2020 The Author(s)

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