Impact of non-injection window on front facet temperature in laser diodes via electro-opto-thermal multiphysics simulation

作者：Jiachen Liu, Shunhua Wu, Junyue Zhang, Lang Chen, Jiachen Zhang, Weizhou Huang, Lei Ling, Qingkai Meng, Rui Zhang, Zhenfu Wang, Wei Gao, Te Li · 发表于：Optics & Laser Technology · 年份：2025 · DOI：10.1016/j.optlastec.2025.113158 · 被引用次数：4 · 研究领域：Semiconductor Quantum Structures and Devices、Semiconductor Lasers and Optical Devices、Advanced Semiconductor Detectors and Materials

Catastrophic optical mirror damage (COMD) remains a critical barrier to scaling the output power of high-power laser diodes. The non-injection window (NIW) structure offers a promising solution to overcome this limitation. This study presents an analysis of high power laser diodes incorporating the NIW design. We introduce a quasi-three-dimensional analysis method that incorporates iterative electro-optical-thermal multimodal coupling. This method account for the effects of temperature on both electrical and optical performance, as well as the impact of electro-optical coupling on the heat generation. Compared to a typical 808 nm single-emitter device with a cavity length of 4 mm and a ridge-waveguide width of 105 μm, the device configuration with a 100 μm NIW demonstrates superior performance. Specifically, the front facet temperature drops by 5.4 °C, and the bandgap shrinkage is reduced by 43 %, reaching a value of 2.1 meV under a continuous wave condition at 10.8 A and room temperature. These results confirm that the NIW is effective in increasing the COMD power threshold.