Enhanced refractive index sensor using a combination of a long period fiber grating and a small core singlemode fiber structure

Wu, Qiang, Chan, Hau Ping, Yuan, Jinhui, Ma, Youqiao, Yang, Minwei, Semenova, Yuliya, Yan, Binbin, Wang, Pengfei, Yu, Chongxiu and Farrell, Gerald (2013) Enhanced refractive index sensor using a combination of a long period fiber grating and a small core singlemode fiber structure. Measurement Science and Technology, 24 (9). 094002. ISSN 0957-0233

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Official URL: http://dx.doi.org/10.1088/0957-0233/24/9/094002

Abstract

An enhanced refractive index (RI) sensor based on a combination of a long period fiber grating (LPG) and a small core singlemode fiber (SCSMF) structure is proposed and developed. Since the LPG and SCSMF transmission spectra experience a blue and a red shift respectively as the surrounding RI (SRI) increases, the sensitivity is improved by measuring the separation between the resonant wavelengths of the LPG and SCSMF structures. Experimental results show that the sensor has a sensitivity of 1028 nm/SRI unit in the SRI range from 1.422 to 1.429, which is higher than individual sensitivities of either structure alone used in the experiment. Experimental results agree well with simulation results.

Item Type: Article
Uncontrolled Keywords: refractive index sensor, long period fiber grating
Subjects: H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Physics and Electrical Engineering
Depositing User: Ay Okpokam
Date Deposited: 15 May 2015 15:33
Last Modified: 01 Mar 2016 11:21
URI: http://nrl.northumbria.ac.uk/id/eprint/22498

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