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

Dong-Bo Wang; Jin-Chuan Zhang; Feng-Min Cheng; Yue Zhao; Ning Zhuo; Shen-Qiang Zhai; Li-Jun Wang; Jun-Qi Liu; Shu-Man Liu; Feng-Qi Liu; Zhan-Guo Wang

doi:10.1186/s11671-018-2455-z

Nanoscale Research Letters (Feb 2018)

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

Dong-Bo Wang,
Jin-Chuan Zhang,
Feng-Min Cheng,
Yue Zhao,
Ning Zhuo,
Shen-Qiang Zhai,
Li-Jun Wang,
Jun-Qi Liu,
Shu-Man Liu,
Feng-Qi Liu,
Zhan-Guo Wang

Affiliations

Dong-Bo Wang: Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences; Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices
Jin-Chuan Zhang: Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences; Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices
Feng-Min Cheng: Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences; Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices
Yue Zhao: Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences; Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices
Ning Zhuo: Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences; Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices
Shen-Qiang Zhai: Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences; Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices
Li-Jun Wang: Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences; Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices
Jun-Qi Liu: Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences; Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices
Shu-Man Liu: Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences; Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices
Feng-Qi Liu: Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences; Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices
Zhan-Guo Wang: Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences; Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices

DOI: https://doi.org/10.1186/s11671-018-2455-z
Journal volume & issue: Vol. 13, no. 1
pp. 1 – 7

Abstract

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Abstract 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 ~ 4.76 μm 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 °C with a high wall-plug efficiency (WPE) of 4.7% in a continuous-wave (CW) mode.

Published in Nanoscale Research Letters

ISSN: 1931-7573 (Print); 1556-276X (Online)
Publisher: SpringerOpen
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.springer.com/journal/11671

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