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17 October 2012 Refractometer based on a superimposed optical fiber grating
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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.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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