Phase-locked arrays of surface-emitting terahertz quantum-cascade lasers

被引：45

作者：

Kao, Tsung-Yu ^{[1
]}

Hu, Qing ^{[1
]}

Reno, John L. ^{[2
]}

机构：

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

[2] Sandia Natl Labs, Dept 1123, Albuquerque, NM 87185 USA

来源：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 10期

基金：

美国国家科学基金会;

关键词：

METAL WAVE-GUIDE; ANTIGUIDES;

D O I：

10.1063/1.3358134

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the demonstration of phase-locked arrays of surface-emitting distributed-feedback (DFB) terahertz quantum-cascade lasers with single-mode operations. Carefully designed "phase sector" locks several surface-emitting DFB laser ridges in-phase, creating tighter beam-patterns along the phased-array direction with full width at half maximum (FWHM) approximate to 10 degrees. In addition, the phase sector can be individually biased to provide a mechanism of frequency tuning through gain-induced optical index change, without significantly affecting the output power levels. A tuning range of 1.5 GHz around 3.9 THz was achieved. This fine tunability could be utilized to frequency-or phase-lock the DFB array to an external reference. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3358134]

引用

页数：3

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