Title :
Tunable wavelength-selective liquid crystal filters for 600-channel FDM system
Author :
Hirabayashi, Katsuhiko ; Tsuda, Hiroyuki ; Kurokawa, Takashi
Author_Institution :
NTT Optoelectron. Labs., Kanagawa, Japan
fDate :
6/1/1992 12:00:00 AM
Abstract :
A tunable wavelength-selective filter is described that is capable of selecting one channel from over 600 channels at a wavelength of 1.47-1.60 mu m by stacking two liquid-crystal Fabry-Perot interferometers, one with a wide tuning range of 127 nm and a broad bandwidth of 3.4 nm and the other with a very narrow bandwidth of 0.07 nm (9 GHz) and a small tuning range of 12 nm. This filter has an efficient finesse of 1800, and it can select one channel from 600 light sources with 0.2-nm (25-GHz) spacing at a beam optics loss of 5 dB.<>
Keywords :
frequency division multiplexing; light interferometers; liquid crystal devices; multiplexing equipment; optical communication equipment; optical filters; tuning; 1.47 to 1.60 micron; 5 dB; 600-channel FDM system; Fabry-Perot interferometers; beam optics loss; liquid crystal filters; tunable wavelength-selective filter; Bandwidth; Fabry-Perot interferometers; Light sources; Liquid crystals; Optical beams; Optical filters; Optical interferometry; Optical losses; Optical tuning; Stacking;
Journal_Title :
Photonics Technology Letters, IEEE
