DocumentCode
841815
Title
Frequency-Dependent Linewidth Enhancement Factor of Quantum-Dot Lasers
Author
Gerhard, Sven ; Schilling, Christian ; Gerschütz, Florian ; Fischer, Marc ; Koeth, Johannes ; Krestnikov, Igor ; Kovsh, Alexey ; Kamp, Martin ; Höfling, Sven ; Forchel, Alfred
Author_Institution
Tech. Phys., Univ. Wurzburg, Wurzburg
Volume
20
Issue
20
fYear
2008
Firstpage
1736
Lastpage
1738
Abstract
We present detailed measurements of the linewidth enhancement factor (LEF) of a quantum-dot distributed-feedback laser emitting around 1.3 mum 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 1 well below and 3 well above threshold, converging around 2 close to threshold.
Keywords
optical modulation; quantum dot lasers; spectral line breadth; frequency-dependent linewidth enhancement factor; quantum-dot distributed-feedback laser; quantum-dot lasers; Distributed-feedback (DFB) laser; Henry-factor; linewidth enhancement factor (LEF); quantum-dot (QD) laser;
fLanguage
English
Journal_Title
Photonics Technology Letters, IEEE
Publisher
ieee
ISSN
1041-1135
Type
jour
DOI
10.1109/LPT.2008.2004675
Filename
4604698
Link To Document