Tunable terahertz quantum cascade lasers with external gratings

被引：57
|
作者：
Lee, Alan Wei Min [1 ,2 ]
Williams, Benjamin S.
Kumar, Sushil [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, CINT, Dept 1132, Albuquerque, NM 87185 USA
来源：
OPTICS LETTERS | 2010年 / 35卷 / 07期
基金：
美国能源部; 美国国家航空航天局; 美国国家科学基金会;
关键词：
HIGH-POWER;
D O I：
10.1364/OL.35.000910
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We demonstrate a frequency tunable external cavity terahertz quantum cascade laser using an abutted antireflection-coated silicon lens to reduce facet reflection and as a beam-forming element, with an external grating providing frequency selective optical feedback. Angle tuning of the grating allows a single longitudinal mode of the laser ridge to be selected, resulting in discontinuous tuning over a 165 GHz range around a center frequency of 4.4 THz. Another device exhibited 145 GHz of total tuning with 9 GHz of continuous tuning near the longitudinal modes of the laser. (C) 2010 Optical Society of America
引用
收藏
页码：910 / 912
页数：3
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