Abstract

Fiber Bragg gratings (FBGs) are inherently sensitive to temperature, axial strain, and pressure, which can be easily measured by a shift of the Bragg wavelength in their reflected/transmitted power spectrum. FBG sensors acquire many more additional sensing modalities and applications when the polarization of the interrogating light is controlled. For the polarization to have an effect, the cylindrical symmetry of the fiber must be broken, either by the structure of the fiber itself, by that of the FBG, or by the perturbation to be measured. Polarization control allows for sensing parameters that are spatially oriented, such as lateral force, bending or twist, and also for measurements of the properties of anisotropic media. Most importantly, polarization control enables high quality all-fiber surface plasmon resonance (SPR) FBG sensors and localized SPR-assisted sensing. This tutorial will cover the theory of polarized measurements in fiber gratings, their experimental implementation, and review a selection of the most important applications.

© 2016 OAPA

In fiber Bragg grating twist sensor based on analysis of polarization dependent loss

Wang Yiping, Ming Wang, and Xiaoqin Huang
Opt. Express 21(10) 11913-11920 (2013)

High resolution interrogation of tilted fiber grating SPR sensors from polarization properties measurement

Christophe Caucheteur, Yanina Shevchenko, Li-Yang Shao, Marc Wuilpart, and Jacques Albert
Opt. Express 19(2) 1656-1664 (2011)

Performance of low-cost few-mode fiber Bragg grating sensor systems: polarization sensitivity and linearity of temperature and strain response

D. Ganziy, B. Rose, and O. Bang
Appl. Opt. 55(23) 6156-6161 (2016)

Twisted tilted fiber Bragg gratings: new structures and polarization properties

Piotr Kisała, Janusz Mroczka, Sławomir Cięszczyk, Krzysztof Skorupski, and Patryk Panas
Opt. Lett. 43(18) 4445-4448 (2018)

Stretchable fiber-Bragg-grating-based sensor

Li Xu, Ning Liu, Jia Ge, Xianqiao Wang, and Mable P. Fok
Opt. Lett. 43(11) 2503-2506 (2018)