Top Grating, Surface-Emitting DFB Quantum Cascade Lasers in Continuous-Wave Operation

被引：6

作者：

Liu, Yinghui ^{[1
,2
]}

Zhang, Jinchuan ^{[1
,2
]}

Jia, Zhiwei ^{[1
,2
]}

Yao, Danyang ^{[1
,2
]}

Liu, Fengqi ^{[1
,2
]}

Zhai, Shenqiang ^{[1
,2
]}

Zhuo, Ning ^{[1
,2
]}

Wang, Zhanguo ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Semicond, Key Lab Semicond Mat Sci, Beijing 100190, Peoples R China

[2] Beijing Key Lab Low Dimens Semicond Mat & Devices, Beijing 100083, Peoples R China

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2015年 / 27卷 / 17期

关键词：

Semiconductor lasers; quantum cascade lasers; distributed feedback devices;

D O I：

10.1109/LPT.2015.2443780

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We demonstrate room temperature, continuous-wave operation of top grating based surface-emitting distributed feedback quantum cascade lasers at lambda similar to 4.8 gm. The secondorder metal/semiconductor grating structure allows efficient surface emission for the transverse-magnetic-polarized light. The CW output power from the substrate facet reached 94 mW at 25 degrees C, with a low threshold current density of 1.21 kA/cm(2). Single-mode emission with a side-mode suppression ratio about 30 dB is continuously tunable by the heat sink temperature or injection current. A far-field radiation pattern with a small divergence angle of 0.58 x 16.2 is obtained. Our work may contribute to the fabrication approach for substrateemitting distributed feedback lasers based on a very simple processing.

引用

页码：1829 / 1832

页数：4

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