二维光学负反馈系统中光信号放大技术研究

发布时间：2018-04-24 21:46

本文选题：光信号放大 + 光折变效应　；参考：《重庆大学》2015年硕士论文

【摘要】：光信号放大技术是指通过一定的方式来控制入射光的能量流动,从而实现强光信号对弱光信号放大的一种技术。类似于一般的电学负反馈系统,在光学系统中引入负反馈也可以使系统的稳定性、抗干扰能力以及输出信号的精度等性能得到很大程度的改善。光信号放大技术是二维光学负反馈系统需要解决的关键性技术问题之一,光信号放大模块的引入使该系统高速、并行、大容量的输出高质量的光学信号成为可能。本文对二维光信号放大技术的原理和应用进行了深入的研究和探讨,从选择合适的光信号放大方法入手,到光信号放大材料的选择以及本系统对光信号放大模块的要求分别进行了分析研究,设计出适合于本系统光信号放大模块的实验方案。最后,通过进行物理实验,分析论证各个因素对二维光信号放大增益的影响。论文的主要工作有以下几个方面:①分析比较现有的几种常用的二维光信号放大技术的特点及其适用系统,并根据本系统的特点以及对光信号放大模块的要求,选择适用于本系统的最佳光信号放大方法;②分析研究基于光折变效应二波耦合理论的光信号放大技术的基本原理和主要思想,比较不同光折变材料的性能,选择本系统实现二波耦合效应的工作机制和光折变材料;③结合光信号放大的理论知识和本系统对光信号放大模块的要求,设计构建光信号放大模块的实验光路,并通过实验分析论证了写入泵浦光强度、写入信号光强度以及被写入光的入射光强比对光信号放大增益的影响。论文的创新之处:①根据二维光学负反馈系统的特点及其对光信号放大模块的要求,选择合适的光信号放大方法以及实现光信号放大的光折变材料和工作机制,并设计了光信号放大模块的实验方案;②通过所建立的二维数学模型,分析研究了各参量对光信号放大增益的影响,并通过物理实验进行了论证。
[Abstract]:Optical signal amplification is a kind of technology which can control the energy flow of incident light in a certain way and realize the amplification of weak light signal by strong light signal. Similar to the general electronic-negative feedback system, the stability, anti-jamming ability and the precision of the output signal can be greatly improved by introducing negative feedback in the optical system. Optical signal amplification is one of the key technical problems to be solved in two-dimensional optical negative feedback system. The introduction of optical signal amplification module makes it possible for the system to output high speed, parallel and large capacity optical signals with high quality. In this paper, the principle and application of two-dimensional optical signal amplification are deeply studied and discussed. The selection of optical signal amplification material and the requirements of the system for optical signal amplification module are analyzed and studied respectively, and the experimental scheme suitable for the optical signal amplification module of the system is designed. Finally, through physical experiments, the effects of various factors on the gain of two-dimensional optical signal amplification are analyzed and demonstrated. The main work of this paper is as follows: 1. Analyze and compare the characteristics and applicable system of several commonly used two-dimensional optical signal amplification techniques, and according to the characteristics of this system and the requirements of optical signal amplification module, The principle and main idea of optical signal amplification based on the two-wave coupling theory of photorefractive effect are studied, and the performances of different photorefractive materials are compared. Selecting the working mechanism of the system to realize the two-wave coupling effect, combining the theoretical knowledge of optical signal amplification with the photorefractive material, and the requirements of the system for the optical signal amplification module, the experimental optical circuit of the optical signal amplification module is designed and constructed. The effects of the intensity of the write pump light, the intensity of the written signal and the ratio of the incident intensity of the written light on the amplification gain of the optical signal are demonstrated by experimental analysis. According to the characteristics of the two-dimensional optical negative feedback system and the requirements of the optical signal amplification module, the paper selects the appropriate optical signal amplification method, the photorefractive material and the working mechanism to realize the optical signal amplification, according to the characteristics of the two-dimensional optical negative feedback system and the requirements of the optical signal amplification module. The experimental scheme of optical signal amplification module is designed. The influence of various parameters on the gain of optical signal amplification is analyzed and studied by the established two-dimensional mathematical model, which is demonstrated by physical experiments.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN722

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