Ultra-Narrow Dual-Channel Filter Based on Symmetrical Sampled Fibre Bragg Grating  

作　　者：刘雪明 王雷然 宫永康 王涛 卢克清 张同意 赵卫 

机构地区：[1]State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710068

出　　处：《Chinese Physics Letters》2007年第5期1302-1304,共3页中国物理快报（英文版）

基　　金：Supported by the Hundreds of Talents Programme of Chinese Academy of Sciences, and the Natural Science Foundation of China under Grant Nos 10604066, 10674176 and 60537060.

摘　　要：A kind of ultra-narrow dual-channel filter is proposed in principle and demonstrated experimentally. This filter is designed by means of two sampled fibre Bragg gratings （SFBGs）, where one is periodic O-π sampling and the other is symmetrical spatial sampling. The former can create two stopbands in the transmission spectra and the latter can produce two ultra-narrow passbands. Our filter has the 3-dB bandwidth of about 1 pm, whose value is two orders of magnitude less than the bandwidth of the traditional SFBG filters. The proposed filter has a merit that the channel spacing remains unchanged when tuning the filter.A kind of ultra-narrow dual-channel filter is proposed in principle and demonstrated experimentally. This filter is designed by means of two sampled fibre Bragg gratings （SFBGs）, where one is periodic O-π sampling and the other is symmetrical spatial sampling. The former can create two stopbands in the transmission spectra and the latter can produce two ultra-narrow passbands. Our filter has the 3-dB bandwidth of about 1 pm, whose value is two orders of magnitude less than the bandwidth of the traditional SFBG filters. The proposed filter has a merit that the channel spacing remains unchanged when tuning the filter.

分 类 号：O43[机械工程—光学工程]