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

被引：0

作者：

Lin, Chengji ^{[1
]}

Zhang, Depei ^{[1
]}

Wang, Yalan ^{[2
]}

Zhang, Jin ^{[2
]}

Du, Pengfei ^{[2
]}

Wo, Jianghai ^{[2
]}

Peng, Xiaoniu ^{[1
]}

机构：

[1] Hubei Univ, Fac Phys & Elect Sci, Hubei Key Lab Ferroelect & Dielect Mat & Devices, Wuhan 430062, Peoples R China

[2] Air Force Early Warning Acad, Wuhan 430019, Peoples R China

来源：

AOPC 2021: MICRO-OPTICS AND MOEMS | 2021年 / 12066卷

关键词：

Fourier domain mode-locked optoelectronic oscillator; fiber Bragg grating sensor; microwave photonics;

D O I：

10.1117/12.2601921

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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 mu s/mu s is achieved.

引用

页数：5