Double-layer gratings for optical demultiplexer in DWDM

摘要

In this paper, the double-layer gratings recorded in photopolymer films for the optical demultiplexer is presented. The channel spacing of 0.4nm, the channel uniformity of 3.5 dB, the 3dB-bandwidth of 0.12 nm, and the channel crosstalk of -20dB is experimentally obtained.