Mid-infrared photonic integrated circuits (PICs) that combine on-chip light sources with other optical components constitute a key enabler for applications such as chemical sensing, light detection, ranging, and free-space communications. In this paper, we report the monolithic integration of interband cascade lasers emitting at 3.24 µm with passive, high-index-contrast waveguides made of chalcogenide glasses. Output from the chalcogenide waveguides exhibits pulsed peak power up to 150 mW (without roll-over), threshold current density 280 A/cm², and slope efficiency 100 mW/A at 300 K, with a lower bound of 38% efficiency for coupling between the two waveguides. These results represent an important step toward the realization of fully integrated mid-infrared PICs.

中文翻译：

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单片硫属化物玻璃波导集成带间级联激光器

将片上光源与其他光学组件相结合的中红外光子集成电路 (PIC) 是化学传感、光检测、测距和自由空间通信等应用的关键推动因素。在本文中，我们报告了以 3.24 µm 发射的带间级联激光器与由硫属化物玻璃制成的无源高折射率对比度波导的单片集成。硫族化物波导的输出显示脉冲峰值功率高达 150 mW（无翻转）、阈值电流密度 280 A/cm ²和斜率效率在 300 K 时为 100 mW/A，耦合效率下限为 38%在两个波导之间。这些结果代表了实现完全集成的中红外 PIC 的重要一步。