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首页> 外文会议>High-power diode laser technology and applications XVI >Blue 450nm high power semiconductor continuous wave laser bars exceeding rollover output power of 80W
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Blue 450nm high power semiconductor continuous wave laser bars exceeding rollover output power of 80W

机译：蓝色450nm大功率半导体连续波激光棒超过80W的翻转输出功率

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摘要

Industrial material processing like cutting or welding of metals is rather energy efficient using direct diode or diode pumped solid state lasers. However, many applications cannot be addressed by established infrared laser technology due to fundamental material properties of the workpiece: For example materials like copper or gold have too low absorption in the near infrared wavelength range to be processed efficiently by use of existing high power laser systems. The huge interest to enable high power kW systems with more suitable wavelengths in the blue spectral range triggered the German funded research project 'BLAULAS': Therein the feasibility and capability of CW operating high power laser bars based on the GaN material system was investigated by Osram and Laserline. High performance bars were enabled by defeating fundamental challenges like material quality as well as the chip processes, both of which differ significantly from well-known IR laser bars. The research samples were assembled on actively cooled heat sinks with hard solder technology. For the first time an output power of 98W per bar at 60A drive current was achieved. Conversion efficiency as high as 46% at 50W output power was demonstrated.
机译：使用直接二极管或二极管泵浦的固态激光器，对金属进行切割或焊接等工业材料加工相当节能。然而，由于工件的基本材料特性，许多应用无法通过成熟的红外激光技术解决：例如，铜或金之类的材料在近红外波长范围内的吸收率太低，无法通过使用现有的高功率激光系统进行有效处理。希望在蓝色光谱范围内拥有更合适的波长的高功率kW系统的巨大兴趣触发了德国资助的研究项目“ BLAULAS”：其中，欧司朗研究了基于GaN材料系统的连续波操作高功率激光棒的可行性和能力。和Laserline。克服了诸如材料质量和芯片工艺等基本挑战，从而实现了高性能棒材，而这两项挑战均与众所周知的IR激光棒明显不同。研究样品通过硬焊技术组装在主动冷却的散热器上。首次实现了在60A驱动电流下每巴98W的输出功率。在50W输出功率下，转换效率高达46％。

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