Linewidth rebroadening due to nonlinear gain and index induced by carrier heating in strained quantum-well lasers

Author

Girardin, Francois ; Duan, Guang-Hua ; Gallion, Philippe

Author_Institution

Dept. Commun., Ecole Nat. Superieure des Telecommun., Paris, France

Volume

8

Issue

3

fYear

1996

fDate

3/1/1996 12:00:00 AM

Firstpage

334

Lastpage

336

Abstract

The carrier heating has been recently recognized as one of the main origins of nonlinear gain, in particular in strained quantum-well lasers. The asymmetry of this effect introduces a nonlinear refractive index. The joint effects of nonlinear gain and nonlinear refractive index that are both due to carrier heating together with the spatial-hole-burning give rise to an increase in the carrier density and in the linewidth enhancement factor. These effects can explain the linewidth rebroadening at high power in phase-shifted single-mode DFB lasers.

Keywords

carrier density; distributed feedback lasers; laser modes; laser theory; nonlinear optics; optical hole burning; quantum well lasers; refractive index; spectral line breadth; carrier density; high power; linewidth enhancement factor; linewidth rebroadening; nonlinear gain; nonlinear refractive index; phase-shifted single-mode DFB lasers; spatial-hole-burning; strained quantum-well lasers; y carrier heating; Charge carrier density; Heating; Laser noise; Nonlinear optics; Optical materials; Power lasers; Quantum well lasers; Refractive index; Semiconductor lasers; Stimulated emission;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.481108

Filename

481108