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8 February 2012 Newly developed high-power laser diode bars
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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.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Nobuto Kageyama, Takenori Morita, Kousuke Torii, Motoki Takauji, Takehito Nagakura, Junya Maeda, Hirofumi Miyajima, and Harumasa Yoshida "Newly developed high-power laser diode bars", Proc. SPIE 8241, High-Power Diode Laser Technology and Applications X, 82410I (8 February 2012);


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