Reduction of second- and third-order harmonic distortion by nonlinear absorption in gain-coupled distributed-feedback laser diodes

Author

Futakuchi, Naoki ; Taguchi, Tomoyuki ; Nakano, Yoshiaki

Author_Institution

Dept. of Electron. Eng., Tokyo Univ., Japan

Volume

5

Issue

3

fYear

1999

Firstpage

463

Lastpage

468

Abstract

We have calculated the characteristics of second- and third-order harmonic distortion in gain-coupled distributed feedback (DFB) lasers using a set of three rate equations. In these calculations, the relaxation oscillation, nonlinear gain compression, and nonlinear loss compression are taken into account. We have found that modulation distortion due to nonlinear gain compression is reduced significantly in the gain-coupled DFB laser of absorptive-grating type. This improvement occurs because gain compression is compensated by loss compression within the grating

Keywords

diffraction gratings; distributed feedback lasers; harmonic distortion; light absorption; nonlinear optics; optical losses; semiconductor lasers; absorptive-grating type; gain-coupled DFB laser; gain-coupled DFB lasers; gain-coupled distributed-feedback laser diodes; loss compression; modulation distortion; nonlinear absorption; nonlinear gain compression; nonlinear loss compression; rate equations; relaxation oscillation; second-order harmonic distortion; third-order harmonic distortion; Absorption; Costs; Distributed feedback devices; Gratings; Harmonic distortion; Laser feedback; Laser modes; Laser noise; Laser theory; Optical materials;

fLanguage

English

Journal_Title

Selected Topics in Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

1077-260X

Type

jour

DOI

10.1109/2944.788406

Filename

788406