Stable Single-Mode Operation of Distributed Feedback Quantum Cascade Laser by Optimized Reflectivity Facet Coatings

被引：12
|
作者：
Wang, Dong-Bo [1 ,2 ]
Zhang, Jin-Chuan [1 ]
Cheng, Feng-Min [1 ,2 ]
Zhao, Yue [1 ,2 ]
Zhuo, Ning [1 ]
Zhai, Shen-Qiang [1 ]
Wang, Li-Jun [1 ,2 ]
Liu, Jun-Qi [1 ,2 ]
Liu, Shu-Man [1 ,2 ]
Liu, Feng-Qi [1 ]
Wang, Zhan-Guo [1 ]
机构：
[1] Chinese Acad Sci, Inst Semicond, Beijing Key Lab Low Dimens Semicond Mat & Devices, Key Lab Semicond Mat Sci, Beijing 100083, Peoples R China
[2] Univ Chinese Acad Sci, Coll Mat Sci & Optoelect Technol, Beijing 101408, Peoples R China
来源：
NANOSCALE RESEARCH LETTERS | 2018年 / 13卷
基金：
北京市自然科学基金;
关键词：
Quantum cascade laser; Distributed feedback; Facet coating; Stable single mode; SEMICONDUCTOR-LASERS; ROOM-TEMPERATURE; CONTINUOUS-WAVE; POWER;
D O I：
10.1186/s11671-018-2455-z
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this work, quantum cascade lasers (QCLs) based on strain compensation combined with two-phonon resonance design are presented. Distributed feedback (DFB) laser emitting at similar to 4.76 mu m was fabricated through a standard buried first-order grating and buried heterostructure (BH) processing. Stable single-mode emission is achieved under all injection currents and temperature conditions without any mode hop by the optimized antireflection (AR) coating on the front facet. The AR coating consists of a double layer dielectric of Al2O3 and Ge. For a 2-mm laser cavity, the maximum output power of the AR-coated DFB-QCL was more than 170 mW at 20 degrees C with a high wall-plug efficiency (WPE) of 4.7% in a continuous-wave (CW) mode.
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页数：7
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