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Theoretical study on high-speed modulation of Fabry-Pérot and distributed-feedback quantum-dot lasers: K-factor-limited bandwidth and 10 Gbit/s eye diagrams.
- Source :
- Journal of Applied Physics; 1/1/2007, Vol. 101 Issue 1, p013108-N.PAG, 7p, 5 Graphs
- Publication Year :
- 2007
-
Abstract
- This paper presents a theoretical study of the high-speed modulation response of Fabry-Pérot (FP) and distributed-feedback (DFB) quantum-dot lasers based on the rate equation models, making reference to available experimental data. We show that the K-factor-limited maximum modulation bandwidth increases with the maximum optical gain and that there is an optimum cavity loss to maximize the bandwidth at a given maximum gain, enabling us to design the bandwidth of FP lasers as well as DFB lasers with and without a phase shift. We present modulation wave forms of FP quantum-dot lasers to indicate that the maximum modal gain of 30–40 cm<superscript>-1</superscript> is sufficient for 10 Gbit/s eye opening, which explains the recent success of 10 Gbit/s modulation of the quantum-dot laser with ten dot layers in the active region having the maximum modal gain of 35 cm<superscript>-1</superscript>. We show a design for low-driving-current 10 Gbit/s operation by shortening the cavity length with the optimum cavity loss maintained by the high-reflectivity coating. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 101
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 23761936
- Full Text :
- https://doi.org/10.1063/1.2407259