Based on the microwave photonics filter technique, an FBG array for quasi-distributed strain sensing has been proposed and demonstrated. The kernel of this work is that the strain on the FBG array changes the wavelength of these FBGs, which is converted to the variation of the time delay of the time response of the generated microwave photonic filter. Results show that, there is good measurement linearity between the time delay and applied strain. The proposed scheme enjoys fast interrogation speed and high resolution, hoping to provide a valuable reference in the field of temperature, index refractive and other parameters sensing.

© (19 December 2022) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

Xiaozhong Tian, Yiping Wang, Jingzhan Shi, and Dan Zhu, "Quasi-distributed strain measurement for fiber Bragg grating array based on microwave photonic filter technique," Proc. SPIE 12321, Advanced Sensor Systems and Applications XII, 123210N (Presented at SPIE/COS Photonics Asia: 19 December 2022; Published: 19 December 2022); https://doi.org/10.1117/12.2661017.