Title :
Tapered, resonant DBR transmission filters
Author :
Sahlén, Olof ; Öberg, Magnus ; Nilsson, Stefan
Author_Institution :
Ericsson Telecom AB, Stockholm, Sweden
fDate :
3/1/1993 12:00:00 AM
Abstract :
Wavelength-tunable optical filters, in the form of resonant distributed Bragg reflector laser filters, have been fabricated and evaluated. The devices are specially designed as transmission filters and have a novel structure, using low coupling strength in the grating and an up-tapered active section, in order to improve the crosstalk performance and the saturation properties. Fabricated devices have 6-8-dB dynamic range and would give less than 1-dB crosstalk penalty in four-channel systems at 13-dB chip gain. System experiments with two 2-Gb/s channels are reported.<>
Keywords :
crosstalk; diffraction gratings; integrated optics; optical communication equipment; optical filters; tuning; 13 dB; 2 Gbit/s; WDM optical links; chip gain; crosstalk penalty; crosstalk performance; dynamic range; four-channel systems; grating; integrated optics; low coupling strength; resonant DBR transmission filters; resonant distributed Bragg reflector laser filters; saturation properties; tapered filters; up-tapered active section; wavelength-tunable optical filters; Active filters; Crosstalk; Distributed Bragg reflectors; Distributed feedback devices; Dynamic range; Gratings; Optical filters; Resonance; Resonator filters; Tunable circuits and devices;
Journal_Title :
Photonics Technology Letters, IEEE
