Title :
Narrow-band tunable wavelength-selective filters of Fabry-Perot interferometers with a liquid crystal intracavity
Author :
Hirabayashi, Katsuhiko ; Tsuda, Hiroyuki ; Kurokawa, Takashi
Author_Institution :
NTT Opto-Electron. Lab., Kanagawa, Japan
fDate :
3/1/1991 12:00:00 AM
Abstract :
Optimum designs for tunable wavelength-selective filters of Fabry-Perot interferometers with a liquid crystal intracavity are described. A nematic liquid crystal with index numbers 1.5506 and 1.4771 was used. Methods of aligning liquid crystal molecules were studied. The filters provide high finesse (150-410), high transmittance (20-70%), narrow transmission peak (FWHM: 0.17-0.35 nm), and a large shift (>50 nm) at a wavelength of 1.5 mu m. These filters have a potential to select over 50 channels in WDM.<>
Keywords :
light interferometers; nematic liquid crystals; optical filters; tuning; 1.5 micron; Fabry-Perot interferometers; WDM; aligning liquid crystal molecules; channel selection; high finesse; high transmittance; index numbers; liquid crystal intracavity; narrow transmission peak; narrow-band filters; tunable wavelength-selective filters; Absorption; Fabry-Perot interferometers; Filters; Liquid crystals; Mirrors; Narrowband; Optical scattering; Reflectivity; Resonance light scattering; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
