High sensitivity fiber interference strain sensor based on polarized mode coupling and TFBG

Yifan Liu; Zongru Yang; Changyuan Yu

doi:10.1117/12.2601407

9 October 2021 High sensitivity fiber interference strain sensor based on polarized mode coupling and TFBG

Yifan Liu, Zongru Yang, Changyuan Yu

Proceedings Volume 11894, Optoelectronic Devices and Integration X; 118941H (2021) https://doi.org/10.1117/12.2601407
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China

Conference Poster

Abstract

A higher sensitive sensor can provide more precise measurements in industry and research applications. Sagnac loop structure is a significant interference structure in optic fiber sensors for strain measurement. In this research, we propose a sensor structure that links a commercial Panda PMF to a 4° TFBG. With an analysis of the sensitization effect of TFBG to the interference sensors, there will be a significant enhancement of sensitivity. Based on the analysis, we demonstrate a sensor that combined TFBG with PMF to enhance the sensitivity. When a strain affects the sensor, the spectra will shift towards a longer wavelength direction. When a strain affects the sensor, the spectra will shift towards a longer wavelength direction. The proposed sensor can provide a sensitivity up to 51.9pm/ffff and 50.5pm/ffff. Meanwhile, it can measure the temperature independently on a sensitivity of 8.56pm/℃

Conference Presentation

Citation Download Citation

Yifan Liu, Zongru Yang, and Changyuan Yu "High sensitivity fiber interference strain sensor based on polarized mode coupling and TFBG", Proc. SPIE 11894, Optoelectronic Devices and Integration X, 118941H (9 October 2021); https://doi.org/10.1117/12.2601407

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