Single-mode quantum cascade lasers employing a candy-cane shaped monolithic coupled cavity

被引:15
作者
Liu, Peter Q. [1 ]
Sladek, Kamil [1 ]
Wang, Xiaojun [2 ]
Fan, Jen-Yu [2 ]
Gmachl, Claire F. [1 ]
机构
[1] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA
[2] AdTech Opt, City Of Industry, CA 91748 USA
关键词
WAVE-GUIDES; BEND;
D O I
10.1063/1.3664117
中图分类号
O59 [应用物理学];
学科分类号
摘要
We demonstrate single-mode quantum cascade lasers emitting at similar to 4.5 mu m by employing a monolithic "candy-cane" shaped coupled-cavity consisting of a straight section connecting at one end to a spiral section. The fabrication process is identical to those for simple Fabry-Perot-type ridge lasers. Continuously tunable single-mode emission across similar to 8 cm(-1) with side mode suppression ratio up to similar to 25 dB and a single-mode operating current range of more than 70% above the threshold current is achieved when the lasers are operated in pulsed-mode from 80 K to 155 K. (C) 2011 American Institute of Physics. [doi:10.1063/1.3664117]
引用
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页数:3
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