Frequency-Dependent Linewidth Enhancement Factor of Quantum-Dot Lasers

被引：9

作者：

Gerhard, Sven ^{[1
]}

Schilling, Christian ^{[1
]}

Gerschuetz, Florian ^{[2
]}

Fischer, Marc ^{[1
,2
]}

Koeth, Johannes ^{[2
]}

Krestnikov, Igor ^{[3
]}

Kovsh, Alexey ^{[3
]}

Kamp, Martin

Hoefling, Sven ^{[1
]}

Forchel, Alfred ^{[1
]}

机构：

[1] Univ Wurzburg, D-97074 Wurzburg, Germany

[2] Nanoplus Nanosyst & Technol GmbH, D-97218 Gerbrunn, Germany

[3] Innolume GmbH, D-44263 Dortmund, Germany

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2008年 / 20卷 / 17-20期

关键词：

Distributed-feedback (DFB) laser; Henry-factor; linewidth enhancement factor (LEF); quantum-dot (QD) laser;

D O I：

10.1109/LPT.2008.2004675

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We present detailed measurements of the linewidth enhancement factor (LEF) of a quantum-dot distributed-feedback laser emitting around 1.3 mu m above and below threshold. The above threshold method is based on the measurement of the frequency modulation and amplitude modulation response of the laser and shows significant dependence on modulation frequency. Drive current dependent measurements with both methods yield LEF values between I well below and 3 well above threshold, converging around 2 close to threshold.

引用

页码：1736 / 1738

页数：3

共 9 条

[1] Direct measurement of the linewidth enhancement factor by optical heterodyning of an amplitude-modulated quantum cascade laser [J].