RUI: Noise Shaping in Complex Nonlinear Optical Systems

复杂自然系统的行为是因果动态演化和随机事件耦合的结果。这项工作是一项关于非线性动力学过程如何塑造中等复杂物理系统中多个噪声源的统计量的协调实验和理论研究。本文研究的非线性过程发生在光纤中，由调Q激光脉冲偏振分量的多阶受激拉曼散射(SRS)、受激布里渊散射(SBS)和四波混频(FWM)组成。这些过程在广泛的应用中存在或被积极利用，例如频率变换、信号放大和处理以及脉冲压缩。因此，了解这些非线性过程是如何形成噪声的，具有实际和根本的重要性。

The behavior of complex natural systems results from the coupling of causal dynamical evolution with random events. This work is a coordinated experimental and theoretical investigation of how nonlinear dynamical processes shape the statistics of multiple noise sources in moderately complex physical systems. The nonlinear processes on which this work will focus occur in optical fiber and consist of multi-order stimulated Raman Scattering (SRS), stimulated Brillouin scattering (SBS), and four-wave mixing (FWM) of polarization components of Q-switched laser pulses. These processes are present or actively exploited in a wide range of applications such as frequency conversion, signal amplification and processing, and pulse compression. Understanding how these nonlinear processes shape noise is therefore of both practical and fundamental importance.