Improving the Modulation Bandwidth in Semiconductor Lasers by Passive Feedback
- Bandelow, Uwe
- Rehbein, Wolfgang
- Troppenz, Ute
- Glitzky, Annegret
- Kreissl, Jochen
- Wolfrum, Matthias
- Radziunas, Mindaugas
Publication date
January 2007
DOI Publisher
Institute of Electrical and Electronics Engineers (IEEE)Abstract
We explore the concept of passive-feedback lasers (PFLs) for direct signal modulation at 40 Gb/s. Based on numerical simulation and bifurcation analysis, we explain the main mechanisms in these devices that are crucial for modulation at high speed. The predicted effects are demonstrated experimentally by means of correspondingly designed devices. In particular, a significant improvement of the modulation bandwidth at low-injection currents can be demonstrate
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