Spontaneous emission factor of a microcavity DBR surface-emitting laser

Author

Baba, Toshihiko ; Hamano, Tetsuko ; Koyama, Fumio ; Iga, Kenichi

Author_Institution

Precision & Intelligence Lab., Tokyo Inst. of Technol., Yokohama, Japan

Volume

27

Issue

6

fYear

1991

fDate

6/1/1991 12:00:00 AM

Firstpage

1347

Lastpage

1358

Abstract

The spontaneous emission factor (SEF) of a microcavity distributed Bragg reflector (DBR) surface-emitting laser has been obtained theoretically to investigate the possibility of the thresholdless lasing operation. Formulas expressing the spontaneous emission in a three-dimensional microcavity were obtained. By introducing the distribution of mode density in wavevector space, it is shown that the radiation pattern of spontaneous emission is deeply modified by the microcavity and is different from that in free space. Based on this result, the SEF and the emission lifetime are calculated as a function of emission spectral width and the size of the active region. It is found that the SEF exceeds 0.1, even though the spectral width is as large as 30 nm when the transverse size is smaller than 0.5 μm and the DBR reflectivity is larger than 90%

Keywords

distributed Bragg reflector lasers; laser cavity resonators; semiconductor junction lasers; superradiance; active region; emission spectral width; microcavity distributed Bragg reflector surface emitting laser; mode density; radiation pattern; spontaneous emission factor; three-dimensional microcavity; thresholdless lasing operation; wavevector space; Distributed Bragg reflectors; High speed optical techniques; Laser modes; Laser theory; Microcavities; Optical interconnections; Optical surface waves; Spontaneous emission; Surface emitting lasers; Vertical cavity surface emitting lasers;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.89951

Filename

89951