Static Gain, Optical Modulation Response, and Nonlinear Phase Noise in Saturated Quantum-Dot Semiconductor Optical Amplifiers
Abbreviated Journal Title
IEEE J. Quantum Electron.
Gain recovery; modulation response; phase noise; quantum dots (QDs); semiconductor optical amplifiers (SOAs); LINEWIDTH ENHANCEMENT FACTOR; LASERS; RECOVERY; Engineering, Electrical & Electronic; Optics; Physics, Applied
A rate equation model preserving charge neutrality for quantum-dot semiconductor optical amplifiers (QD-SOAs) is established to investigate the nonlinear gain dynamics in the saturation regime. The static gain of QD-SOA is calculated assuming overall charge neutrality and compared with that without overall charge neutrality. Optical modulation response and nonlinear phase fluctuation through saturated QD-SOAs are calculated numerically based on a small-signal analysis. The gain dynamics of QD-SOAs are strongly dependent on the current injection level. The carrier reservoir in the wetting layer and continuum state is necessary for QD-SOAs to operate with high gain, high saturation power, and ultrafast gain recovery.
Ieee Journal of Quantum Electronics
"Static Gain, Optical Modulation Response, and Nonlinear Phase Noise in Saturated Quantum-Dot Semiconductor Optical Amplifiers" (2009). Faculty Bibliography 2000s. 1791.