Title :
Optical narrow-band filters using optical amplification with distributed feedback
Author :
Magari, Katsuaki ; Kawaguchi, Hitoshi ; Oe, Kunishige ; Fukuda, Mitsuo
Author_Institution :
Opto-Electron. Lab., NTT, Kanagawa, Japan
fDate :
11/1/1988 12:00:00 AM
Abstract :
The amplification characteristics of the distributed-feedback (DFB) laser amplifier are studied. The amplifier has a narrow, single-frequency gain-bandwidth product and the maximum-gain frequency tunability. With these advantages, the amplifier can be applied as an optical narrowband filter. This filter has optical frequency selectivity with an extinction ratio of better than -15 dB for optical inputs separated by 9.8 GHz having different optical input powers. By using a multielectrode DFB laser amplifier, the wide-range tunability of a gain maximum frequency (33.3 GHz) can be obtained while maintaining a constant gain and a constant gain-bandwidth product. Optical frequency selection with an extinction ratio of better then -20 dB can be obtained for two optical inputs separated by 15.4 GHz and having the same input power
Keywords :
distributed feedback lasers; optical filters; semiconductor junction lasers; 20 dB; amplification characteristics; distributed-feedback laser amplifier; laser diode; maximum-gain frequency tunability; narrow single-frequency gain-bandwidth product; optical frequency selectivity; optical narrowband filter; Distributed amplifiers; Distributed feedback devices; Frequency; Narrowband; Optical amplifiers; Optical crosstalk; Optical feedback; Optical filters; Optical interferometry; Stimulated emission;
Journal_Title :
Quantum Electronics, IEEE Journal of
