A novel tip-reflection and power-referenced refractometry based on fiber-to-fiber evanescently coupling between tilted fiber Bragg grating and D-shaped fiber is proposed and demonstrated to measure surrounding refractive index (SRI) as low as 1.33.

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Conference Asia Communications and Photonics Conference, ACPC 2015
Citation
Cai, Z. (Zhongyue), Liu, F. (Fu), Guo, T, Guan, B.-O. (Bai-Ou), Peng, G.-D. (Gang-Ding), & Albert, J. (2015). Power-referenced refractometer based on fiber-to-fiber evanescently coupling between a tilted fiber Bragg grating and a D-shaped fiber. Presented at the Asia Communications and Photonics Conference, ACPC 2015.