Title :
New structure of tunable wavelength-selective filters with a liquid crystal for FDM systems
Author :
Hirabayashi, Katsuhiko ; Tsuda, Hiroyuki ; Kurokawa, Takashi
Author_Institution :
NTT Opto-electron. Lab., Kanagawa, Japan
Abstract :
To decrease the bandwidth of liquid-crystal Fabry-Perot interferometers (LC-FPIs), LC-FPIs having a double-layer cavity were devised where the intracavity consists of the LC layer and a glass layer. This filter is shown to have a very narrow bandwidth (full width at half maximum <10 GHz), low loss (4 dB), and a large tunability (9 nm). It is also shown to have the potential to select over 50 channels for FDM (frequency division multiplexing) systems.<>
Keywords :
frequency division multiplexing; light interferometers; liquid crystal devices; optical communication equipment; optical filters; double-layer cavity; frequency division multiplexing systems; glass layer; intracavity; liquid-crystal Fabry-Perot interferometers; loss; tunability; tunable wavelength-selective filters; very narrow bandwidth; Bandwidth; Filters; Glass; Indium tin oxide; Interferometers; Liquid crystals; Mirrors; Optical scattering; Reflectivity; Refractive index;
Journal_Title :
Photonics Technology Letters, IEEE
