Evanescent wave on the gold-coating tilt fiber grating surface and its sensing applications

Author

Youqing Wang ; Changyu Shen ; Weimin Lou ; Fengying Shentu ; Albert, Jacques

Author_Institution

Inst. of Optoelectron. Technol., China Jiliang Univ., Hangzhou, China

fYear

2015

Firstpage

1

Lastpage

3

Abstract

The scatterings of P and S-polarized evanescent wave on the surface of a tilted fiber Bragg grating (TFBG) with a 50 nm thick gold coating were investigated experimentally by observing radiation patterns from discontinuities in the coating. The scattering intensity for P-polarized light is larger than for S-polarized light when the evanescent wave propagates from the coating towards the discontinuity. Using the characteristics of the polarization of the evanescent wave, the in-line polarimeter and twist sensors were designed.

Keywords

Bragg gratings; diffraction gratings; fibre optic sensors; gold; light polarisation; light scattering; Au; P-polarized evanescent wave scatterings; S-polarized evanescent wave scatterings; gold-coating tilt fiber grating surface; in-line polarimeter; radiation patterns; scattering intensity; sensing applications; size 50 nm; twist sensors; Coatings; Gold; Optical fiber polarization; Optical fiber sensors; Optical surface waves; Scattering; Fiber Bragg gratings; Scattering; Surface plasmons;

fLanguage

English

Publisher

ieee

Conference_Titel

Optical Communications and Networks (ICOCN), 2015 14th International Conference on

Conference_Location

Nanjing

Type

conf

DOI

10.1109/ICOCN.2015.7203661

Filename

7203661