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.

引用

页数：7

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