Title :
A computer controlled narrow bandpass optical tunable filter using a Fourier diffraction grating in the range of 1.3-1.55 μm
Author :
Iida, Masanori ; Asakura, Hiroyuki
Author_Institution :
Mater. & Devices Lab., Matsushita Electr. Ind. Co. Ltd., Osaka, Japan
fDate :
12/1/1995 12:00:00 AM
Abstract :
A novel tunable filter using a Fourier grating is studied and discussed. It consists of a Fourier grating, a collimator lens, single-mode fibers, and a computer controlled rotary actuator. It has very low polarization dependence of less than 0.3 dB, an insertion loss of less than 3 dB, and a narrow bandwidth of 1.5 nm. Wavelength selection was realized by rotating the grating, which was controlled by a computer. The device is able to select the light at the desired wavelength from more than 100 WDM optical data streams with 2 nm spacing in the range of 1.3-1.55 μm
Keywords :
diffraction gratings; light polarisation; multiplexing equipment; optical communication equipment; optical filters; optical losses; tuning; wavelength division multiplexing; 1.3 to 1.55 mum; 3 dB; Fourier diffraction grating; Fourier grating; WDM optical data streams; collimator lens; computer controlled narrow bandpass optical tunable filter; computer controlled rotary actuator; grating rotation; insertion loss; low polarization dependence; narrow bandwidth; single-mode fibers; wavelength selection; Band pass filters; Fiber gratings; Lenses; Optical collimators; Optical computing; Optical control; Optical fiber devices; Optical fiber filters; Optical fiber polarization; Optical filters;
Journal_Title :
Lightwave Technology, Journal of
