Title :
Absorption-controlled tunable DFB amplifier-filters
Author :
Nakajima, Hiromasa ; Charil, J. ; Slempkes, S. ; Robein, D. ; Landreau, Jean ; Pierre, Borderies
Author_Institution :
Lab. de Bagneux, CNET, Bagneux
fDate :
8/4/1994 12:00:00 AM
Abstract :
The continuous tuning range of a three-section DFB amplifier-filter with a passive centre section can be strongly enhanced by combining the carrier-induced Bragg wavelength shift with the conventional wavelength shift due to the phase shift between the two lateral gain sections. This principle is demonstrated by the fabrication of filters exhibiting a nearly constant gain of 15 dB as well as a 4 GHz filtering bandwidth over a 2.2 nm continuous tuning range
Keywords :
asynchronous transfer mode; distributed feedback lasers; laser tuning; optical communication equipment; optical filters; semiconductor lasers; 15 dB; 4 GHz; absorption control; carrier-induced Bragg wavelength shift; constant gain; continuous tuning range; filtering bandwidth; lateral gain sections; passive centre section; tunable DFB amplifier-filters;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19940883
