High power buried sampled grating distributed feedback quantum cascade lasers

被引：13

作者：

Zhang, J. C. ^{[1
]}

Liu, F. Q.

Yao, D. Y.

Zhuo, N.

Wang, L. J.

Liu, J. Q.

Wang, Z. G.

机构：

[1] Chinese Acad Sci, Inst Semicond, Key Lab Semicond Mat Sci, Beijing 100083, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2013年 / 113卷 / 15期

关键词：

WAVE;

D O I：

10.1063/1.4801906

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A novel index-coupled distributed feedback quantum cascade laser emitting at lambda similar to 4.8 mu m is demonstrated by a sampled grating. The coupling coefficient can be almost controlled arbitrarily according to the duty cycle of sampled grating. The additional supermodes caused by the sampled grating can be strongly suppressed by choosing a small sampling period, so that the supermodes are shifted apart from the gain curve. Single-mode emission without any significant disadvantages compared with uniform grating is achieved. Especially, this powerful approach presented here can be applied to achieve the performance with high power and low threshold simultaneously. (C) 2013 AIP Publishing LLC

引用

页数：4