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Proceedings Paper

Newly developed high-power laser diode bars
Author(s): Nobuto Kageyama; Takenori Morita; Kousuke Torii; Motoki Takauji; Takehito Nagakura; Junya Maeda; Hirofumi Miyajima; Harumasa Yoshida
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Paper Abstract

High Power Laser Diode (LD) modules are widely used as high-brightness light sources for pumping solid-state lasers and for direct diode laser processing utilizing a compact feature. The LD bars installed in modules are required with higher output power, efficiency and beam quality. We have optimized the LD bar structure for high output power and efficient operation. The water-cooled heat sink has been designed for excellent thermal performance as well as long-term stable cooling performance. We have also developed the thermal expansion controlled assembly technique to suppress the "smile". As a result, we have achieved an output power of over 200 W and a conversion efficiency of 58% from 940 nm LD bars under continuous wave (CW) operation with very low smile of 0.8 μm.

Paper Details

Date Published: 8 February 2012
PDF: 8 pages
Proc. SPIE 8241, High-Power Diode Laser Technology and Applications X, 82410I (8 February 2012); doi: 10.1117/12.905523
Show Author Affiliations
Nobuto Kageyama, Hamamatsu Photonics K.K. (Japan)
Takenori Morita, Hamamatsu Photonics K.K. (Japan)
Kousuke Torii, Hamamatsu Photonics K.K. (Japan)
Motoki Takauji, Hamamatsu Photonics K.K. (Japan)
Takehito Nagakura, Hamamatsu Photonics K.K. (Japan)
Junya Maeda, Hamamatsu Photonics K.K. (Japan)
Hirofumi Miyajima, Hamamatsu Photonics K.K. (Japan)
Harumasa Yoshida, Hamamatsu Photonics K.K. (Japan)

Published in SPIE Proceedings Vol. 8241:
High-Power Diode Laser Technology and Applications X
Mark S. Zediker, Editor(s)

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