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28 September 2015 Gas refractometer based on an S-taper fiber tailored fiber Bragg grating
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Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 96340R (2015) https://doi.org/10.1117/12.2194523
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil
Abstract
A fiber Bragg grating (FBG)-based gas refractometer is proposed and demonstrated experimentally. The configuration consists of a short section of S-type taper followed with a FBG. The S-taper is capable to couple the core mode to cladding modes into the downstream SMF, and the low-order cladding modes can be reflected back to the fiber core via the FBG, in which the recoupling efficiency is highly dependent on surrounding refractive index (RI) of liquid and gas. Experimental results show that some recoupled cladding modes show high sensitivities to surround RI. This power-referenced RI measurement and wavelength-referenced temperature measurement have been achieved via selective cladding modes monitoring.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Zhihua Shao, Weijia Bao, Xueguang Qiao, and Qiangzhou Rong "Gas refractometer based on an S-taper fiber tailored fiber Bragg grating", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96340R (28 September 2015); https://doi.org/10.1117/12.2194523
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