Refractometer based on a superimposed optical fiber grating

Jie Zheng; Xinyong Dong; Chunliu Zhao; Shangzhong Jin

doi:10.1117/12.975188

17 October 2012 Refractometer based on a superimposed optical fiber grating

Jie Zheng, Xinyong Dong, Chunliu Zhao, Shangzhong Jin

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 842154 (2012) https://doi.org/10.1117/12.975188
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

A refractometer based on a superimposed optical fiber grating, where a fiber Bragg grating (FBG) with broadband reflection (~2.7nm) is superimposed in the rear part of a tilted fiber Bragg grating (TFBG), is proposed and experimentally demonstrated. The superimposed grating is immersed in liquid with different refractive index. Optical power reflected back by the FBG is modulated twice by the TFBG that greatly enhances the sensitivity. And by using the broadband reflection FBG, instead of a normal FBG, signal to noise ratio is also improved.

Citation Download Citation

Jie Zheng, Xinyong Dong, Chunliu Zhao, and Shangzhong Jin "Refractometer based on a superimposed optical fiber grating", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 842154 (17 October 2012); https://doi.org/10.1117/12.975188

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