Title :
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
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;
Journal_Title :
Quantum Electronics, IEEE Journal of
DOI :
10.1109/JQE.2012.2199084
