Narrow Vertical Far-Field 975-nm Broad-Area DFB Lasers for Wide Temperature Range Operation

Author

Schultz, Christoph M. ; Crump, Paul ; Wenzel, Hans ; Brox, Olaf ; Bugge, Frank ; Erbert, Götz

Author_Institution

Ferdinand-Braun-Inst. fur Hochstfrequenztechnik, Berlin

Volume

21

Issue

9

fYear

2009

fDate

5/1/2009 12:00:00 AM

Firstpage

593

Lastpage

595

Abstract

We report on 100-mum-wide 975-nm distributed-feedback lasers with a cavity length of 2 mm, which deliver 2.4 W within a 14deg vertical far-field angle (full-width at half-maximum) and 35% power conversion efficiency in combination with a spectral linewidth of 0.27 nm (95% power content). The epitaxial design is a compromise between a narrow vertical far-field and a good power conversion efficiency, as required for application as a pump source. Narrow linewidth operation is sustained to 100degC, enabled by use of a grating with a high coupling coefficient.

Keywords

diffraction gratings; distributed feedback lasers; laser cavity resonators; optical pumping; semiconductor lasers; spectral line narrowing; thermo-optical effects; broad-area diode lasers; broad-area lasers; distributed-feedback lasers; epitaxial design; grating; high coupling coefficient; laser cavity length; narrow linewidth operation; power conversion efficiency; pump source; size 100 mum; spectral linewidth; temperature 100 degC; vertical far-field lasers; wavelength 975 nm; wide temperature range operation; Distributed-feedback (DFB) lasers; power conversion; pumping of lasers; semiconductor lasers;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2009.2014644

Filename

4783066