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Power scaling in quantum cascade lasers using broad-area stripes with reduced cascade number

机译：使用级联数量减少的广域条纹在量子级联激光器中进行功率缩放

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For many applications, optical emission power of many watts in the midinfrared part of the optical spectrum is required. Quantum cascade lasers for these applications typically contain 30 to 40 cascades and have laser ridge widths of about 10 μm. These lasers cannot, however, be readily scaled up in power. This paper demonstrates a path for further power scaling that is based on broad stripes with fewer than 15 cascades. Although the confinement factor r for this design approach is lower than for designs with 30 to 40 cascades, the ability to efficiently extract heat from the top and bottom of the lasers more than offsets the r disadvantage. We expect this approach to deliver tens of watts of power with high beam quality leading to high brilliance. The paper discusses the design approach, thermal conduction considerations, and confinement factor. Room temperature cw operation of broad-area lasers based on this approach is demonstrated and described.
机译：对于许多应用，在光谱的中红外部分需要许多瓦的光发射功率。用于这些应用的量子级联激光器通常包含30至40个级联，并且激光脊的宽度约为10μm。但是，这些激光器无法轻易按比例放大功率。本文展示了基于少于15个级联的宽条带进一步功率缩放的路径。尽管此设计方法的限制因子r低于具有30至40级联的设计的限制因子，但有效地从激光器顶部和底部抽出热量的能力远远抵消了r的缺点。我们希望这种方法可以提供数十瓦的功率，并具有高光束质量，从而带来高亮度。本文讨论了设计方法，热传导注意事项和限制因素。演示并描述了基于这种方法的广域激光器的室温连续波操作。

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