Title :
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
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;
Conference_Titel :
Optical Communications and Networks (ICOCN), 2015 14th International Conference on
Conference_Location :
Nanjing
DOI :
10.1109/ICOCN.2015.7203661
