Mode-locked pulses from mid-infrared Quantum Cascade Lasers

被引：165

作者：

Wang, Christine Y. ^{[1
]}

Kuznetsova, Lyuba ^{[2
]}

Gkortsas, V. M. ^{[3
]}

Diehl, L. ^{[2
]}

Kaertner, F. X. ^{[3
]}

Belkin, M. A.

Belyanin, A. ^{[2
,4
]}

Li, X. ^{[2
]}

Ham, D. ^{[2
]}

Schneider, H. ^{[5
]}

Grant, P. ^{[6
]}

Song, C. Y. ^{[6
]}

Haffouz, S. ^{[6
]}

Wasilewski, Z. R. ^{[6
]}

Liu, H. C. ^{[6
]}

Capasso, Federico ^{[2
]}

机构：

[1] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[2] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA

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

[4] Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA

[5] Forschungszentrum Dresden Rossendorf, Inst Ion Beam Phys & Mat Res, D-01314 Dresden, Germany

[6] CNR, Inst Microstruct Sci, Ottawa, ON K1A 0R6, Canada

来源：

OPTICS EXPRESS | 2009年 / 17卷 / 15期

关键词：

WELL INFRARED PHOTODETECTOR; GENERATION; LOCKING; WATER;

D O I：

10.1364/OE.17.012929

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this study, we report the unequivocal demonstration of mid-infrared mode-locked pulses from quantum cascade lasers. The train of short pulses was generated by actively modulating the current and hence the gain of an edge-emitting quantum cascade laser (QCL). Pulses with duration of about 3 ps at full-width-at-half-maxima and energy of 0.5 pJ were characterized using a second-order interferometric autocorrelation technique based on a nonlinear quantum well infrared photodetector. The mode-locking dynamics in the QCLs was modeled based on the Maxwell-Bloch equations in an open two-level system. Our model reproduces the overall shape of the measured autocorrelation traces and predicts that the short pulses are accompanied by substantial wings as a result of strong spatial hole burning. The range of parameters where short mode-locked pulses can be formed is found. (C) 2009 Optical Society of America

引用

页码：12929 / 12943

页数：15

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