Demultiplexer based on an off-axis holographic lens with low monochromatic aberrations  

作　　者：李森森 刘守 张向苏 任雪畅 

机构地区：[1]Department of Electronic Engineering,Xiamen University [2]Department of Physics,Xiamen University

出　　处：《Chinese Optics Letters》2011年第9期11-13,共3页中国光学快报（英文版）

基　　金：supported by the "985" Project of Xiamen University and the National Natural Science Foundation of China (No. 50802080)

摘　　要：A novel scheme is proposed, in which the aberrations in the off-axis holographic lenses used as demultiplexers are reduced to a low enough level for relatively small channel spacing. The scheme includes optimizing the recording and reconstruction geometries and collimating the reconstruction wave with a gradient-index lens. A demultiplexer operated in the 1 550-nm band with 5-nm channel spacing and -∞-dB crosstalk is obtained using the scheme. The channel spacing can be decreased to 2 nm by etching the cladding of the output fibers to a smaller size.A novel scheme is proposed, in which the aberrations in the off-axis holographic lenses used as demultiplexers are reduced to a low enough level for relatively small channel spacing. The scheme includes optimizing the recording and reconstruction geometries and collimating the reconstruction wave with a gradient-index lens. A demultiplexer operated in the 1 550-nm band with 5-nm channel spacing and -∞-dB crosstalk is obtained using the scheme. The channel spacing can be decreased to 2 nm by etching the cladding of the output fibers to a smaller size.

关 键 词：ABERRATIONS Holographic optical elements Optical instrument lenses 

分 类 号：TN929.1[电子电信—通信与信息系统]