Analysis of two parallel long-period fiber gratings

被引：50
作者：
Chiang, KS [1 ]
Chan, FYM
Ng, MN
机构：
[1] City Univ Hong Kong, Optoelect Res Ctr, Hong Kong, Hong Kong, Peoples R China
[2] City Univ Hong Kong, Dept Elect Engn, Hong Kong, Hong Kong, Peoples R China
来源：
JOURNAL OF LIGHTWAVE TECHNOLOGY | 2004年 / 22卷 / 05期
关键词：
coupled-mode theory; fiber gratings; long-period fiber gratings (LPFGs); optical couplers; optical filters;
D O I：
10.1109/JLT.2004.825357
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A wavelength-selective coupler constructed with two parallel identical uniform long-period fiber gratings (LPFGs) is analyzed by the coupled-mode theory. The effects of introducing a longitudinal offset distance between the two gratings on the transmission characteristics of the coupler are discussed and the conditions for achieving a 100% coupling efficiency are highlighted. It is found that 100% coupling can be achieved with a practical grating length by using a proper grating design and a suitable index-matching surrounding medium. The theoretical results agree well with the experimental data.
引用
收藏
页码：1358 / 1366
页数：9
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