Direct design of high channel-count fiber Bragg grating filters with low index modulation

被引：30
作者：
Cao, Hui [1 ,2 ]
Atai, Javid [1 ]
Shu, Xuewen [3 ]
Chen, Guojie [4 ]
机构：
[1] Univ Sydney, Sch Elect & Informat Engn, Sydney, NSW 2006, Australia
[2] Foshan Univ, Sch Elect & Informat Engn, Foshan 528000, Guangdong, Peoples R China
[3] Aston Univ, Photon Res Grp, Birmingham B4 7ET, W Midlands, England
[4] Foshan Univ, Sch Sci, Foshan 528000, Guangdong, Peoples R China
来源：
OPTICS EXPRESS | 2012年 / 20卷 / 11期
基金：
中国国家自然科学基金;
关键词：
LAYER-PEELING ALGORITHM; REFRACTIVE-INDEX; DISPERSION; FABRICATION; OPTIMIZATION;
D O I：
10.1364/OE.20.012095
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
a novel method for designing high channel-count fiber Bragg gratings (FBGs) is proposed. For the first time, tailored group delay is introduced into the target reflection spectra to obtain a more even distribution of the refractive index modulation. This approach results in the reduction of the maximum refractive index modulation to physically realizable levels. The maximum index modulation reduction factors are all greater than 5.5. This is a significant improvement compared with previously reported results. Numerical results show that the thus designed high channel-count FBG filters exhibit superior characteristics including 30 dB channel isolation, a flat-top and near 100% reflectivity in each channel. (C) 2012 Optical Society of America
引用
收藏
页码：12095 / 12110
页数：16
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