Analysis of surface-emitting lambda /4-shifted DFB lasers with a distributed Bragg reflector

Author

Makino, T.

Author_Institution

Bell-Northern Res. Ltd., Ottawa, Ont., Canada

Volume

3

Issue

1

fYear

1991

Firstpage

12

Lastpage

14

Abstract

Threshold current density and differential quantum efficiency are analyzed for a surface emitting (SE) lambda /4-shifted distributed feedback (DFB) laser consisting of alternating active and passive layers with a distributed Bragg reflector (DBR). It is shown that the threshold current density can be reduced by using the DFB action induced by alternating active and passive layers in the active region of the SE DFB laser structure, as compared to SE DBR lasers with a homogeneous active region. It is also shown that the differential quantum efficiency of the DFB laser with a DBR can be higher than that of conventional DBR lasers without increasing the threshold current density.<>

Keywords

distributed Bragg reflector lasers; distributed feedback lasers; laser theory; semiconductor junction lasers; DFB laser; active layers; differential quantum efficiency; distributed Bragg reflector; distributed feedback; homogeneous active region; passive layers; surface-emitting lambda /4-shifted DFB lasers; threshold current density; Distributed Bragg reflectors; Distributed feedback devices; Fiber lasers; Laser feedback; Optical refraction; Optical surface waves; Semiconductor laser arrays; Surface emitting lasers; Threshold current; Vertical cavity surface emitting lasers;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.68032

Filename

68032