Open AccessAdd/drop channel filter based on fiber-Bragg-grating-assisted coupler fabricated by asymmetric fused taper technology
Author(s) -
Dong Xiang,
Pei-li,
Shuisheng Jian
Publication year - 2006
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.55.4739
Subject(s) - fiber bragg grating , materials science , optics , long period fiber grating , phosfos , drop (telecommunication) , grating , filter (signal processing) , coupled mode theory , graded index fiber , fiber , optoelectronics , fiber optic sensor , refractive index , physics , telecommunications , wavelength , computer science , composite material , computer vision
All-fiber add/drop filter based on fiber-Bragg-grating (FBG) assisted coupler is compact and non-interferometric, which reduces the device's sensitivity to the grating position. By introducing the grating refractive modulation into the evanescent field coupling, the coupled-mode equation of FBG-assisted coupler is obtained and the influences of fiber mismatch on the filter spectra is investigated thoroughly. And a high-quality FBG-assisted filter is achieved by adjusting fiber structure parameters using asymmetric fused taper technology. The experimentally measured results are in good agreement with the numerical calculations.