Efficient and Reliable High-Power Laser Diode Bars With Low-Smile Implementation

Author

Kageyama, Nobuto ; Torii, Kousuke ; Morita, Takenori ; Takauji, Motoki ; Nagakura, Takehito ; Maeda, Junya ; Miyajima, Hirofumi ; Yoshida, Harumasa

Author_Institution

Hamamatsu Photonics K.K., Hamamatsu, Japan

Volume

48

Issue

8

fYear

2012

Firstpage

991

Lastpage

994

Abstract

We report on our recent development of high power 940 nm laser diodes (LDs) bars. The optimization of the laser structure and thermal management allow over 200-W continuous wave (CW) operation with 58% conversion efficiency from the 1-cm LD bar. We have also developed an assembly technique, and have suppressed the smile of LD bars mounted even on Cu heatsinks with hard solder to less than 1 μm. Long term stability have also be confirmed under 200-W CW operation.

Keywords

heat sinks; laser reliability; laser stability; quantum well lasers; solders; thermal management (packaging); CW operation; Cu heatsinks; assembly technique; continuous wave operation; conversion efficiency; hard solder; laser structure; long term stability; low-smile implementation; optimization; power 200 W; reliable high-power laser diode bars; thermal management; wavelength 940 nm; Bars; Copper; Diode lasers; Heat sinks; Photonics; Power generation; Semiconductor lasers; Semiconductor laser arrays; semiconductor lasers;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/JQE.2012.2199084

Filename

6198859