Enhanced RI sensor using a combination of a long period fiber grating and a small core singlemode fiber (SCSMF) structure

Qiang Wu, Youqiao Ma, Yuliya Semenova, Pengfei Wang, H. P. Chan, Gerald Farrell

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

An enhanced refractive index (RI) sensor with combination of 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 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.

Original languageEnglish
Title of host publication22nd International Conference on Optical Fiber Sensors
DOIs
Publication statusPublished - 2012
Event22nd International Conference on Optical Fiber Sensors - Beijing, China
Duration: 15 Oct 201219 Oct 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8421
ISSN (Print)0277-786X

Conference

Conference22nd International Conference on Optical Fiber Sensors
Country/TerritoryChina
CityBeijing
Period15/10/1219/10/12

Keywords

  • Long period grating
  • Refractive index sensing
  • SMS

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