基于QD-SOA交叉相位调制全光逻辑或门啁啾特性的研究

Characteristics of All-Optical Logic OR Gate Chirp based on QD-SOA-XPM

利用马赫-曾德尔干涉仪(Mach-Zehnder Interferometer,MZI)结构实现了基于量子点半导体光放大器(Quantum-Dot Semiconductor Optical Amplifier,QD-SOA)交叉相位调制(Cross-Phase Modulation,XPM)全光逻辑或门。变换光啁啾在一定程度上影响系统的传输性能与输出波形,通过求解跃迁速率方程,建立QD-SOA仿真模型,研究全光逻辑或门的啁啾特性,并仿真分析了有源区长度、背景光功率、脉冲宽度以及注入电流对啁啾的影响。结果表明:有源区长度设置在1.0~2.0 mm、背景光功率设置在小于0 dBm、脉冲宽度设置在1.0 ps左右,QD-SOA-XPM全光逻辑或门的性能较好。

The Mach-Zehnder Interferometer(MZI)structure is used to implement all-optical logic based on Quantum-Dot Semiconductor Optical Amplifier(QD-SOA)Cross-Phase Modulation(XPM)Or gate.Transforming optical chirp affects the transmission performance and output waveform of the system to a certain degree.By solving the transition rate equation and establishing a QD-SOA simulation model,the chirp characteristic of the all-optical logic OR gate is explored.The effects of the active region length,background light power,pulse width and injection current on chirp are simulated.The good logic OR gates properties could be achieved when the length of the active region at 1.0~2.0 mm,the background light power less than 0 dBm and the pulse width at about 1.0 ps.