Refractive index sensor based on helical long period grating based on dual-hole elliptical core fiber

Chao Liu; Yu Zhang; Zhihai Liu; Yaxun Zhang

doi:10.1117/12.2267548

23 April 2017 Refractive index sensor based on helical long period grating based on dual-hole elliptical core fiber

Chao Liu, Yu Zhang, Zhihai Liu, Yaxun Zhang

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103235J (2017) https://doi.org/10.1117/12.2267548
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

In this paper, the fabrication of a novel refractive index sensor based on helical long period grating (HLPG) written in a dual-hole elliptical core fiber (DHECF) was demonstrated and the sensing characteristic was experimentally investigated. Due to the structure of the DHECF, The proposed HLPG sensor could work with ultra-small dose testing samples. In addition, since the sample is isolated from the external environment, the testing is immunity to the external interference. The experimental results showed that the testing sensitivity of the sensor was 194nm/RIU with the refractive index range of 1.333 to 1.385. The proposed structure will have a good practicability in the microfluidic sensing system.

Citation Download Citation

Chao Liu, Yu Zhang, Zhihai Liu, and Yaxun Zhang "Refractive index sensor based on helical long period grating based on dual-hole elliptical core fiber", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103235J (23 April 2017); https://doi.org/10.1117/12.2267548

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KEYWORDS

Refractive index

Sensors

Structured optical fibers

Cladding

Liquids

Microfluidics

Fiber optics sensors

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