Design and optimization of strained-layer-multiquantum-well lasers for high-speed analog communications

Author

Morthier, Geert

Author_Institution

Lab. of Electromagn. & Acoust., Ghent Univ., Belgium

Volume

30

Issue

7

fYear

1994

fDate

7/1/1994 12:00:00 AM

Firstpage

1520

Lastpage

1528

Abstract

We report on how the contributions from spatial hole burning, gain suppression, and relaxation oscillations to the chirp and harmonic distortion of SL-MQW DFB lasers can be calculated and minimized. It is shown how, by taking into account the specific properties of strained-layer-multiquantum-well (SL-MQW) lasers, simple solutions of the rate equations point the way to a chirp reduction and an increase of the useful bandwidth for analog communications. In such lasers, the absorption is only weakly dependent on the carrier density and therefore the harmonic distortion at lower modulation frequencies is mainly caused by spatial hole burning. Our numerical simulations indicate that in many cases this distortion is seduced by the same measures that reduce the chirp and increase the bandwidth

Keywords

carrier density; distributed feedback lasers; high-speed optical techniques; laser theory; optical communication; optical communication equipment; optical hole burning; optical modulation; semiconductor lasers; SL-MQW DFB lasers; absorption; bandwidth; carrier density; chirp; design; gain suppression; harmonic distortion; high-speed analog communications; modulation frequencies; numerical simulations; optimization; rate equations; relaxation oscillations; spatial hole burning; strained-layer-multiquantum-well lasers; Absorption; Bandwidth; Charge carrier density; Chirp modulation; Design optimization; Equations; Frequency modulation; Harmonic distortion; Laser noise; Optical design;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.299483

Filename

299483