Nonlinear gain behavior in injectorless quantum cascade lasers

被引：3
|
作者：
Katz, Simeon [1 ]
Vizbaras, Augustinas [1 ]
Boehm, Gerhard [1 ]
Amann, Markus-Christian [1 ]
机构：
[1] Tech Univ Munich, Walter Schottky Inst, D-85748 Garching, Germany
来源：
OPTICAL ENGINEERING | 2010年 / 49卷 / 11期
关键词：
injectorless; quantum cascade laser; gain measurement; nonlinear gain; CONTINUOUS-WAVE;
D O I：
10.1117/1.3498765
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The gain spectra of a continuous wave operating injectorless quantum cascade lasers are presented. These are extracted by the Hakki-Paoli method from electroluminescence measurements. The device operates around 7.4 mu m and has threshold current densities in pulsed and continuous wave operation at room temperature that measure 1.1 and 1.76 kA/cm(2), respectively. The differential gain coefficients around 100 cm/kA at liquid nitrogen temperature and 44 cm/kA around room temperature are determined. The gain measurement values are compared with the 1/L threshold behavior versus temperature, indicating a nonlinear gain current dependence of injectorless devices. (C) 2010 Society of Photo-Optical Instrumentation Engineers. [DOI: 10.1117/1.3498765]
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页数：5
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