Tunable amplification properties of distributed feedback laser diodes

Author

Kikushima, Koji ; Nawata, Kiyoshi ; Koga, Masafumi

Author_Institution

Transmission Syst. Lab., NTT, Kanagawa-ken, Japan

Volume

25

Issue

2

fYear

1989

fDate

2/1/1989 12:00:00 AM

Firstpage

163

Lastpage

170

Abstract

The tunable amplification properties of a distributed feedback laser diode (DFB-LD) are described. The performance of the laser diode as an optical filter, its tuning range, amplification gain, crosstalk due to submodes, and signal-to-noise ratio are determined. To achieve maximum amplification with the least noise, the DFB-LD injection current is held at or near the threshold value by feedback from an optical detector. The resonant wavelength is precisely controlled over a range of 2.0 nm (154 GHz) by varying the temperature of the DFB-LD, while at the same time the injection current is kept at the optimum value by the feedback system. By using the tunable amplification properties of a DFB-LD, an optical tunable filter was experimentally observed

Keywords

crosstalk; distributed feedback lasers; feedback; laser tuning; optical filters; semiconductor junction lasers; 154 GHz; DFB-LD; amplification gain; crosstalk; distributed feedback laser diodes; feedback; laser tuning; optical detector; optical filter; signal-to-noise ratio; Crosstalk; Diode lasers; Distributed feedback devices; Laser feedback; Laser noise; Laser tuning; Optical feedback; Optical filters; Optical tuning; Tunable circuits and devices;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.16259

Filename

16259