实现低发散角和高输出功率的锥形量子级联激光器。
Tapered Quantum Cascade Laser Achieving Low Divergence Angle and High Output Power.
作者信息
Liu Zizhuo, Li Hongxiao, Chen Jiagang, Chen Anlan, Niu Shan, Wu Changlei, Sun Yongqiang, Zhong Xingli, Su Hui, Xu Hao, Zhang Jinchuan, Wu Jiang, Liu Fengqi
机构信息
Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China.
State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 611731, China.
出版信息
Sensors (Basel). 2025 Jul 24;25(15):4572. doi: 10.3390/s25154572.
In this work, we present a high-performance tapered quantum cascade laser (QCL) designed to achieve both high output power and low divergence angle. By integrating a tapered waveguide with a Fabry-Perot structure, significant improvements of tapered QCL devices in both output power and beam quality are demonstrated. The optimized 50 µm wide tapered QCL achieved a maximum output power of 2.76 W in pulsed operation with a slope efficiency of 3.52 W/A and a wall-plug efficiency (WPE) of 16.2%, while reducing the divergence angle to 13.01°. The device maintained a maximum power of 1.34 W with a WPE exceeding 8.2%, measured under room temperature and continuous wave (CW) operation. Compared to non-tapered Fabry-Perot QCLs, the tapered devices exhibited a nearly 10-fold increase in output power and over 200% improvement in WPE. This work provides a promising pathway for advancing mid-infrared laser technology, particularly for applications requiring high power, low divergence, and temperature stability.
在这项工作中，我们展示了一种高性能锥形量子级联激光器（QCL），其设计目的是实现高输出功率和低发散角。通过将锥形波导与法布里 - 珀罗结构集成，展示了锥形QCL器件在输出功率和光束质量方面的显著改进。优化后的50 µm宽锥形QCL在脉冲工作模式下实现了2.76 W的最大输出功率，斜率效率为3.52 W/A，壁插效率（WPE）为16.2%，同时将发散角减小到13.01°。在室温连续波（CW）工作条件下测量，该器件保持了1.34 W的最大功率，WPE超过8.2%。与非锥形法布里 - 珀罗QCL相比，锥形器件的输出功率提高了近10倍，WPE提高了200%以上。这项工作为推进中红外激光技术提供了一条有前景的途径，特别是对于需要高功率、低发散和温度稳定性的应用。
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