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Improvement in Reduced-mode (REM) Diodes Enable 315 W from 105 μm 0.15 NA Fiber-coupled Modules

机译:降低模(REM)二极管的改进可从105μm0.15 NA光纤耦合模块实现315 W

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High-power, high-brightness diode lasers have been pursued for many applications including fiber laser pumping, materials processing, solid-state laser pumping, and consumer electronics manufacturing. In particular, ~915 nm - and ~976 nm diodes are of interest as diode pumps for the kilowatt CW fiber lasers. As a result, there have been many technical thrusts for driving the diode lasers to have both high power and high brightness to achieve high-performance and reduced manufacturing costs. This paper presents our continued progress in the development of high brightness fiber-coupled product platform, nLIGHT element®. In the past decade, the power coupled into a single 105 μm and 0.15 NA fiber has increased by over a factor of ten through improved diode laser brightness and the development of techniques for efficiently coupling multiple emitters. In this paper, we demonstrate further brightness improvement and power-scaling enabled by both the rise in chip brightness/power and the increase in number of chips coupled into a given numerical aperture. We report a new chip technology using x-REM design with brightness as high as 4.3 W/mm-mrad at a BPP of 3 mm-mrad. We also report record 315 W output from a 2×12 nLIGHT element with 105 μm diameter fiber using x-REM diodes and these diodes will allow next generation of fiber-coupled product capable of 250W output power from 105 μm/0.15 NA beam at 915 nm.
机译:高功率,高亮度二极管激光器已经在许多应用中被追求,包括光纤激光器泵浦,材料加工,固态激光器泵浦以及消费类电子产品制造。特别是,〜915 nm和〜976 nm的二极管作为千瓦CW光纤激光器的二极管泵而受到关注。结果,存在许多技术上的推动力来驱动二极管激光器具有高功率和高亮度,以实现高性能并降低制造成本。本文介绍了我们在开发高亮度光纤耦合产品平台nLIGHTelement®方面的持续进展。在过去的十年中,通过改善二极管激光器的亮度以及有效耦合多个发射器的技术的发展,耦合到单个105μm和0.15 NA光纤中的功率已增加了十倍以上。在本文中,我们展示了芯片亮度/功率的增加以及耦合到给定数值孔径中的芯片数量的增加,从而实现了亮度的进一步改善和功率缩放。我们报道了一种采用x-REM设计的新芯片技术,其BPP为3 mmmrad时亮度高达4.3 W / mmmrad。我们还报告了使用x-REM二极管从直径为105μm的2×12 nLIGHT元件输出315 W的记录,这些二极管将使下一代光纤耦合产品能够在915的波长下从105μm/ 0.15 NA光束输出250W的功率纳米

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