Determining the linewidth enhancement factor via optical feedback in quantum dot micropillar lasers

被引：6

作者：

Holzinger, Steffen ^{[1
]}

Kreinberg, Soeren ^{[1
]}

Hokr, Brett H. ^{[2
]}

Schneider, Christian ^{[3
]}

Hoefling, Sven ^{[3
,4
]}

Chow, Weng W. ^{[5
]}

Porte, Xavier ^{[1
]}

Reitzenstein, Stephan ^{[1
]}

机构：

[1] Tech Univ Berlin, Inst Festkorperphys, Quantum Devices Grp, Hardenbergstr 36, D-10623 Berlin, Germany

[2] US Army Space & Missile Def Command, Huntsville, AL USA

[3] Univ Wurzburg, Tech Phys, D-97074 Wurzburg, Germany

[4] Univ St Andrews, Sch Phys & Astron, SUPA, St Andrews KY16 9SS, Fife, Scotland

[5] Sandia Natl Labs, Albuquerque, NM 87185 USA

来源：

OPTICS EXPRESS | 2018年 / 26卷 / 24期

基金：

欧洲研究理事会;

关键词：

SEMICONDUCTOR-LASERS; BROADENING FACTOR; INJECTION; DYNAMICS; REGIMES; ALPHA;

D O I：

10.1364/OE.26.031363

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The linewidth enhancement factor alpha is a key parameter determining the spectral and dynamical behavior of semiconductor lasers. Here, we propose and demonstrate a method for determining this parameter based on a direct measurement of variations in the laser gain and emission spectrum when subject to delayed optical feedback. We then use our approach to determine the pump current dependent linewidth enhancement factor of a high-beta quantum dot micropillar laser. The validity of our approach is confirmed comparing it to two conventional methods, one based on the comparison of the linewidths above and below threshold and the other based on injection locking properties. Furthermore, the pump power dependence of alpha is quantitatively described by simulations based on a quantum-optical model. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：31363 / 31371

页数：9

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