Perfectly phase-matched third-order distributed feedback terahertz quantum-cascade lasers

被引：54

作者：

Kao, Tsung-Yu ^{[1
,2
]}

Hu, Qing ^{[1
,2
]}

Reno, John L. ^{[3
]}

机构：

[1] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA

[2] MIT, Elect Res Lab, Cambridge, MA 02139 USA

[3] Sandia Natl Labs, Ctr Integrated Nanotechnol, Albuquerque, NM 87185 USA

来源：

OPTICS LETTERS | 2012年 / 37卷 / 11期

关键词：

Phase matching - Quantum cascade lasers;

D O I：

10.1364/OL.37.002070

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report a novel laser cavity design in third-order distributed feedback (DFB) terahertz quantum-cascade lasers based on a perfectly phase-matching technique. This approach substantially increases the usable length of the third-order DFB laser and leads to narrow beam patterns. Single frequency emissions from 151 apertures (5.6 mm long device) are coherently added up to form a narrow beam with (FWHM approximate to 6 x 11 degrees) divergence. A similar device with 40 apertures shows more than 5 mW of optical power with slope efficiency similar to 140 mW/A at 10 K pulsed operation. (C) 2012 Optical Society of America

引用

页码：2070 / 2072

页数：3

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