- Slow and fast dynamics of gain and phase in a quantum dot semiconductor optical amplifierT Vallaitis
Institute of High Frequency and Quantum Electronics, University of Karlsruhe TH, Engesserstr 5, 76131 Karlsruhe, Germany
Opt Express 16:170-8. 2008..Relative strengths and time constants of the underlying processes are measured. We find that operation at high bias currents optimizes the performance for nonlinear cross-gain signal processing if a low chirp is required...
- Linear semiconductor optical amplifiers for amplification of advanced modulation formatsR Bonk
Institute of Photonics and Quantum Electronics IPQ, Karlsruhe Institute of Technology KIT, Engesserstr 5, 76131 Karlsruhe, Germany
Opt Express 20:9657-72. 2012..Experiments at 20 GBd BPSK, QPSK and 16QAM with two SOAs with different alpha factors are performed. Simulations for various modulation formats support the experimental findings...
- Quantum dot SOA input power dynamic range improvement for differential-phase encoded signalsT Vallaitis
Institute of Photonics and Quantum Electronics, Karlsruhe Institute of Technology KIT, Engesserstr 5, 76131 Karlsruhe, Germany
Opt Express 18:6270-6. 2010..An analysis of amplitude and phase effects shows that this improvement can be attributed to the lower alpha-factor found in QD SOA...