基于半导体光放大器非线性偏振旋转的高速线性光采样系统的研究

For analysis and processing of high-speed optical signals, there are some defects as non-real-time, non-linear, low efficiency, difficult to integrate on the optical sampling due to technical limitations. How to use existing technology to achieve real-time and effective analysis and processing of high-speed optical signals, it is a serious problem. In order to solve that, the project proposed "Research on high-speed linear optical sampling system based on SOA’s nonlinear polarization rotation", which has high theoretical and academic value. It proposed a high-speed linear sampling scheme of high-speed light signals based on low polarization sensitive SOA’s nonlinear polarization rotation effect; a sampling scheme to acquire the amplitude and phase of the phase modulation signal at the same time based on low polarization sensitive SOA’s polarization rotation switch; achieved high-speed linear sampling of multi-wavelength signals based on gain transparent SOA’s polarization rotation effect; proposed a multi-wavelength sampling program to acquire the amplitude and phase of the phase modulation signal at the same time based on gain transparent SOA’s polarization rotation switch; and used SOA-based annular active and passive mode-locked laser to generate high-speed narrow pulses. The completion of the project has an important role in promoting the development of real-time analysis and processing of high-speed optical signals.

对高速光信号的分析与处理，由于现有技术的限制，在光采样上存在非实时、非线性、效率低、难集成等缺陷。如何利用现有的技术实现对高速光信号实时且有效的分析与处理，是亟待解决的问题。针对以上问题，本项目申请“基于半导体光放大器非线性偏振旋转的高速线性光采样系统的研究”，具有很高的理论意义与学术价值。本项目提出利用低偏振敏感SOA的偏振旋转效应的高速线性光采样方案；利用低偏振敏感SOA的偏振旋转开关的对相位调制信号的幅度与相位同时采集的光采样方案；利用增益透明SOA的偏振旋转效应的多波长信号的高速线性光采样方案；利用增益透明SOA的偏振旋转开关的适于幅度与相位同时采集的多波长光采样方案；利用基于SOA的环形主被动锁模激光器产生高速窄脉冲的方案。本项目的进行与完成对高速光信号的分析与处理有重要推动作用。

光采样技术可以突破传统电域采样的速度限制，并能够大大提升接收端信号的精确度，对于保证通信系统的可靠性和稳定性具有重要意义。由于现有技术的限制，在光采样上存在非实时、非线性、效率低、难集成等缺陷。因此，利用现有技术对高速光信号进行实时、有效的分析与处理具有重要研究意义。本项目研究“基于半导体光放大器非线性偏振旋转的高速线性光采样系统”，具有很高的理论意义与学术价值。主要研究内容包括：研究SOA锁模激光器并进行仿真分析；建立基于SOA偏振旋转效应和开关的仿真模型；实现基于SOA-NPR效应的高速线性光采样；实现基于SOA-NPR开关的适于幅度和相位同时采集的光采样；研究并仿真分析QD-SOA的理论模型；对基于QD-SOA的主动环形锁模激光器进行理论研究和仿真分析；对比分析传统SOA激光器和 QD-SOA 激光器输出的锁模脉冲。研究基于QD-SOA的TOAD结构的全光采样门的原理和理论模型；仿真分析TOAD开关特性；实现基于QD-SOA的TOAD全光采样系统。本项目的研究对未来高速光信号的分析与处理有重要意义。