Highly sensitive fiber Bragg grating sensor interrogation system based on a Fourier domain mode-locked optoelectronic oscillator

Chengji Lin; Depei Zhang; Yalan Wang; Jin Zhang; Pengfei Du; Jianghai Wo; Xiaoniu Peng

doi:10.1117/12.2601921

24 November 2021 Highly sensitive fiber Bragg grating sensor interrogation system based on a Fourier domain mode-locked optoelectronic oscillator

Chengji Lin, Depei Zhang, Yalan Wang, Jin Zhang, Pengfei Du, Jianghai Wo, Xiaoniu Peng

Author Affiliations +

Proceedings Volume 12066, AOPC 2021: Micro-optics and MOEMS; 1206603 (2021) https://doi.org/10.1117/12.2601921
Event: Applied Optics and Photonics China 2021, 2021, Beijing, China

Abstract

We propose a fiber Bragg grating sensor interrogation system based on a Fourier domain mode-locked optoelectronic oscillator (FDML-OEO). The FDML is achieved by synchronizing the period of the driving current of the laser with the round-trip time of the OEO loop. By employing a narrow band electrical filter with the central frequency located within the sweeping frequency of the FDML-OEO, pulsed microwave output can be obtained. The wavelength shift of the phase-shift fiber Bragg grating (PS-FBG) can be interrogated by measuring the pulse interval variation. The experimental results indicate that the pulse interval of the generated signal has a linear relationship with the axial strain applied to the PS-FBG and a sensitivity as high as 0.42 μs/με is achieved.

Citation Download Citation

Chengji Lin, Depei Zhang, Yalan Wang, Jin Zhang, Pengfei Du, Jianghai Wo, and Xiaoniu Peng "Highly sensitive fiber Bragg grating sensor interrogation system based on a Fourier domain mode-locked optoelectronic oscillator", Proc. SPIE 12066, AOPC 2021: Micro-optics and MOEMS, 1206603 (24 November 2021); https://doi.org/10.1117/12.2601921

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