具有极小发散角的衬底发射光子晶体量子级联激光器的10瓦脉冲运转

10-W pulsed operation of substrate emitting photonic-crystal quantum cascade laser with very small divergence.

作者信息

Yao Dan-Yang, Zhang Jin-Chuan, Cathabard Olivier, Zhai Shen-Qiang, Liu Ying-Hui, Jia Zhi-Wei, Liu Feng-Qi, Wang Zhan-Guo

机构信息

Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912, Beijing, 100083 China.

出版信息

Nanoscale Res Lett. 2015 Apr 14;10:177. doi: 10.1186/s11671-015-0877-4. eCollection 2015.

DOI:10.1186/s11671-015-0877-4

PMID:25977652

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4402689/

Abstract

High-power broad area substrate emitting photonic-crystal distributed feedback (DFB) quantum cascade lasers (QCLs) emitting around 4.73 μm is reported. Two-dimensional centered rectangular photonic-crystal (CRPC) grating is introduced to enhance optical coherence in large area device. Main lobe far-field radiation pattern with a very small divergence angle of about 0.65° × 0.31° is obtained. A record peak output power for vertical emitting QCLs exceeding 10 W is obtained with high reflectivity (HR) coating. Robust single longitudinal mode emission with a side mode suppression ratio (SMSR) of 30 dB is continuously tunable by the heat sink temperature up to 65°C.

摘要

报道了发射波长约为4.73μm的高功率宽面积衬底发射光子晶体分布反馈（DFB）量子级联激光器（QCL）。引入二维中心矩形光子晶体（CRPC）光栅以增强大面积器件中的光学相干性。获得了主瓣远场辐射图案，其发散角非常小，约为0.65°×0.31°。通过高反射率（HR）涂层获得了垂直发射QCL超过10W的创纪录峰值输出功率。具有30dB边模抑制比（SMSR）的稳健单纵模发射可通过散热器温度连续调谐至65°C。