Evanescent wave on the gold-coating tilt fiber grating surface and its sensing applications
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||Fiber Bragg gratings, Scattering, Surface plasmons|
|Conference||14th International Conference on Optical Communications and Networks, ICOCN 2015|
Wang, Y. (Youqing), Shen, C. (Changyu), Lou, W. (Weimin), Shentu, F. (Fengying), & Albert, J. (2015). Evanescent wave on the gold-coating tilt fiber grating surface and its sensing applications. Presented at the 14th International Conference on Optical Communications and Networks, ICOCN 2015. doi:10.1109/ICOCN.2015.7203661