Quantum-cascade room-temperature 4.5 – 4.6 μm lasers with different numbers of quantum cascades are developed and studied. It is shown that losses at the metallised sidewalls of the ridge waveguide considerably increase the threshold current density. It is demonstrated that the current density needed to overcome the internal and outcoupling losses in lasers with 30 quantum cascades is an order of magnitude lower than in lasers with 15 quantum cascades.

中文翻译：

---

发射 4.5 – 4.6 μm 的高功率量子级联激光器的开发与研究

开发和研究了具有不同数量的量子级联的量子级联室温 4.5 – 4.6 μm 激光器。结果表明，脊形波导的金属化侧壁处的损耗显着增加了阈值电流密度。结果表明，在具有 30 个量子级联的激光器中，克服内部和外耦合损耗所需的电流密度比具有 15 个量子级联的激光器低一个数量级。