光学学报, 2010, 30 (4): 940, 网络出版: 2010-04-20
基于半导体光放大器的相位调制信号再生器
A Semiconductor Optical Amplifier Based Regenerator for Phase Modulated Signals
光通信 相位调制信号再生器 半导体光放大器 optical communications regenerator for phase modulated signals semiconductor optical amplifier
摘要
对相位调制光通信系统进行幅度和相位的同时再生十分必要。采用半导体光放大器(SOA)作为非线性媒介,搭建一个非线性的马赫-曾德尔干涉仪作为再生器,利用SOA的增益特性,在锁相本地振荡抽运源的驱动下,实现对相位调制信号的幅度和相位的同时再生。理论推导了入射光信号经过基于SOA的再生器后的光场分布公式;讨论了不同入射信号光功率下,抽运光与信号光的相位差对信号功率增益的影响,给出了入射光的最优参数;数值仿真了带有噪声的相位调制信号再生前后的相位分布、强度分布和误码率。研究结果表明,基于SOA的光再生器有良好的再生效果。
Abstract
Amplification and simultaneous phase regeneration are necessary for phase modulated optical fiber communication system. In this paper,using semiconductor optical amplifier (SOA) as nonlinear medium,a nonlinear Mach-Zehnder interferometer (MZI)as the regenerator is designed. The formula of signal after the SOA based MZI regenerator is educed. For different incident power of signal,the relations between signal-pump phase difference and signal gain are discussed. The optimum parameters of input signal and pump are obtained. The distributions of phase and intensities for both the non-regenerated and regenerated signal are simulated. The results show thatthe SOA based optical regenerator has a good regeneration.
席丽霞, 谢扬戈, 唐先锋, 田凤, 张晓光. 基于半导体光放大器的相位调制信号再生器[J]. 光学学报, 2010, 30(4): 940. Xi Lixia, Xie Yangge, Tang Xianfeng, Tian Feng, Zhang Xiaoguang. A Semiconductor Optical Amplifier Based Regenerator for Phase Modulated Signals[J]. Acta Optica Sinica, 2010, 30(4): 940.