摘要
利用量子点半导体光放大器的超快增益恢复特性和交叉增益调制效应,建立了基于量子点半导体光放大器的对称型马赫-曾德尔干涉仪模型,数值实现了对160Gb/s归零码信号的全光逻辑或门运算,并分析了多种系统参数对输出性能的影响。结果表明:一方面,增大注入电流、有源区长度和输入信号光功率均可以提高或门输出信号的Q因子;另一方面,载流子从润湿层到激发态的弛豫时间变短以及较小的线宽增强因子和限制因子也有利于获得较高的Q因子。此外,存在一个最佳的输入信号脉冲宽度使得Q因子的值最大。因此,通过合理优化这些参数值可以大大提高逻辑或门的性能。
The performance of all-optical OR gate operated at 160 Gb/s using QD-SOA-MZI configuration based on cross-gain modulation （XGM） has been simulated. Numerical results show that, high Q factor can be achieved by increasing the injection current, the length of active region and the pump signal power. Also, high Q factor can be obtained by decreasing the electron relaxation time from the WL to the ES, the linewidth enhancement factor and confinement factor. Besides, the input signal pulse width can also affect the performance, and there is an optimum value leads to the highest Q factor. Therefore, the performance of all-optical OR logic gate can be enhanced significantly by optimizing these parameters.
出处
《固体电子学研究与进展》
CAS
CSCD
北大核心
2011年第6期590-595,共6页
Research & Progress of SSE
基金
四川省应用基础科学研究项目(2008JY0064)
关键词
量子点半导体光放大器
马赫-曾德尔干涉仪
交叉增益调制
或门
quantum-dot semiconductor optical amplifier Mach-Zehnder interferometer cross-gain modulation
OR logic gate
