Abstract. Quasicontinuous wave operation of midinfrared quantum cascade lasers are shown to have increased average output power with good beam quality. The ability to enhance average power by a significant fraction of CW power motivates the development of a model to estimate and project performance at varying duty cycles based on a previously developed continuous wave power projection model. The model takes into account pulse to pulse changes in temperature profile to project a transient steady-state temperature distribution. This temperature distribution is used to project both peak and average power in agreement with measurements. Preliminary model projections suggest that high average brightness may be achieved using a reduced number of stages and a greater scaling of core width than would be permissible for CW lasing.

中文翻译：

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测量和模拟量子级联激光器的准连续波操作以提高平均亮度

摘要。中红外量子级联激光器的准连续波操作被证明具有增加的平均输出功率和良好的光束质量。将平均功率提高很大一部分 CW 功率的能力推动了模型的开发，以基于先前开发的连续波功率预测模型来估计和预测不同占空比下的性能。该模型考虑了温度曲线中的脉冲到脉冲变化，以预测瞬态稳态温度分布。该温度分布用于预测与测量相符的峰值和平均功率。初步模型预测表明，与 CW 激光相比，使用减少的级数和更大的纤芯宽度比例可以实现高平均亮度。