Optical Refractive-Index Sensor Based on Dual Fiber-Bragg Gratings Interposed With a Multimode-Fiber Taper

Author

Shao, Li-Yang ; Zhang, A. Ping ; Liu, Wei-Sheng ; Fu, Hong-Yan ; He, Sailing

Author_Institution

Dept. of Opt. Eng., Zhejiang Univ., Hangzhou

Volume

19

Issue

1

fYear

2007

Firstpage

30

Lastpage

32

Abstract

A new type of optical refractive-index (RI) sensor is proposed and experimentally demonstrated by using a structure of two single-mode fiber (SMF) Bragg gratings with a multimode fiber (MMF) taper in-between. The loss induced by a mismatch of waveguide structure between SMFs and MMFs is amplified by a tapering process, and is utilized for RI sensing through evanescent field. Experimental results show that the sensor possesses a tailorable sensitivity to the change of external RI and has a good linear response in the simultaneous measurement of external RI and temperature

Keywords

Bragg gratings; fibre optic sensors; optical fibres; refractive index measurement; dual fiber-Bragg gratings; fiber-optic sensor; multimode-fiber taper; optical refractive-index sensor; Bragg gratings; Fiber gratings; Optical fiber sensors; Optical losses; Optical refraction; Optical sensors; Optical surface waves; Optical waveguides; Stimulated emission; Temperature sensors; Fiber Bragg grating (FBG); fiber-optic sensor; multimode fiber taper (MFT); refractive-index (RI) measurement;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2006.889010

Filename

4032869