Abstract

We propose a multipoint fiber Bragg grating (FBG) sensing system that measures both spectral change of FBGs and precise distance to them by using intensity-modulated light and two-photon absorption process in a silicon avalanche photodiode. We experimentally confirm the principle using five cascaded FBGs with almost the same Bragg wavelength. The optical path length difference and the reflection spectrum for each FBG are successfully measured at the same time. The relative uncertainty of path length measurement is in the order of 10⁻⁴.

© 2017 IEEE

Precision distance measurement using a two-photon absorption process in a silicon avalanche photodiode with saw-tooth phase modulation

Yosuke Tanaka, Seiji Tominaka, and Takashi Kurokawa
Appl. Opt. 54(28) E35-E40 (2015)

Profilometry based on two-photon absorption in a silicon avalanche photodiode

Yosuke Tanaka, Naoya Sako, Takashi Kurokawa, Hiroyuki Tsuda, and Mitsuo Takeda
Opt. Lett. 28(6) 402-404 (2003)

Microwave-photonic Vernier effect enabled high-sensitivity fiber Bragg grating sensors for point-wise and quasi-distributed sensing

Chen Zhu, Osamah Alsalman, and Jie Huang
Opt. Express 31(25) 41996-42014 (2023)

Generalized and wavelength-dependent temperature calibration function for multipoint regenerated fiber Bragg grating sensors

Fabian Buchfellner, Andrea Stadler, Qiang Bian, Maximilian Hennesen, Andreas Zeisberger, Alexander W. Koch, and Johannes Roths
Opt. Express 30(25) 44769-44784 (2022)

Multipoint temperature-independent fiber-Bragg-grating strain-sensing system employing an optical-power-detection scheme

Yan-Ju Chiang, Likarn Wang, Horng-Shyang Chen, Chih-Chung Yang, and Wen-Fung Liu
Appl. Opt. 41(9) 1661-1667 (2002)