Title :
A tunable polarization-independent liquid-crystal Fabry-Perot interferometer filter
Author :
Hirabayashi, Katsuhiko ; Kurokawa, Takashi
Author_Institution :
NTT Opto-electron. Lab., Kanagawa, Japan
fDate :
7/1/1992 12:00:00 AM
Abstract :
The authors propose a simple structure for a tunable polarization-independent wavelength-selective filter. This successfully fabricated filter consists of a liquid crystal Fabry-Perot interferometer, a gamma /4 plate, and a mirror. The input light is divided into a transmitted light and a reflected light. The polarization of this reflected light is rotated 90 degrees by the gamma /4 plate and the mirror and then this light is input again into the filter. The bandwidth is 0.48 nm and the tuning range is 50 nm. Fiber-to-fiber loss is approximately 3.9 dB and polarization dependence of the loss is approximately 0.3 dB.<>
Keywords :
light interferometers; liquid crystal devices; optical filters; optical losses; optical rotation; tuning; 3.9 dB; OC equipment; WDM transmission links; bandwidth; fiber-to-fiber loss; input light; light polarisation; liquid crystal Fabry-Perot interferometer; mirror; optical rotation; polarization dependence; quarter wave plate; reflected light; transmitted light; tunable polarization-independent liquid-crystal Fabry-Perot interferometer filter; tuning range; wavelength-selective filter; Bandwidth; Fabry-Perot interferometers; Filters; Liquid crystals; Mirrors; Optical fiber polarization; Optical interferometry; Optical polarization; Tuning; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
