Biology and chemislry etal ln thi s dissertation , the theory of femto - second pulse laser amplifier system using tifsapphire crystal was discussed systematically and many methods were brought fonvard to resoive the probably existed problems in each part of the system base d on the achieved results , experimentai works has further developed 本文系统给出了以钛宝石晶体做为增益介质和放大介质的飞秒激光脉冲放大系统理论，针对各部分可能出现的问题提出了相应的解决方法，并在此基础上开展了部分实验工作。
The wave - front aberration ' s cumulating of optics elements in multi - pass amplifying system was researched more deeply . considering the correlation between optics elements " wave - front aberrations caused by the similar fabrication technique , the correlation coefficient was adopted to revise calculation rule of superimposition which used in estimating system ' s static wave - front aberration and allocating optical machining precision . 3 进一步研究了多程放大系统中光学元件波前误差的叠加规律，并考虑到钕玻璃片加工工艺的相似性所导致的波前相关性，将相关系数耦合到波前误差叠加公式中，使修正后的公式能更准确地预估系统静态波前和分配光学元件加工精度要求； 3
The cancellation performance ( cp ) of cancellation loops , which constitute the feed - forward amplifier system , is investigated mathematically and the simulation results are given . the effects of amplitude imbalance , phase imbalance and delay mismatch on the cancellation performance of a cancellation loop are fully analyzed 本文分析了前馈功率放大系统中抑制环路的工作原理；推导了幅度失配、相位失配、延迟失配对环路抑制能力的理论解析式，并进行了仿真研究。
The numerical calculation simulation shows that the fgb will change its shape upon propagation . ( 5 ) using the quasi - discrete hankel transform ( qdht ) , the fast calculation code simulating the propagation of cylindrical symmetry laser beams passing through high power laser amplifier system is built up for the first time . the code is applied to ( 3 )明准诉散汉克尔变换编制宁旋转对称光束在高功率激光放大系统中传输的快冰汁彝摸拟程序，利用该程序对超高斯光束在多麟光放大系统中的传输和神光红栩橱化光传。
Besides the theoretical analysis , we also numerically studied the relation between the beam irregularity and b integral for a special four - pass amplifying system . based on these calculations , a " red line " has been set up for the safety of the system . in addition , the variation of beam irregularity with the size of filter ' s hole has been studied 在理论分析的基础上，我们用数值模拟的方法研究了一个具体的四程放大系统中光束非均匀性和b积分的关系，以此确定出了系统运行的“红线” (安四川大之户下员d匕论文全运行警戒线) ;同时探讨了滤波小孔尺寸与光束质量的关系。
At the same time we filter noise and split the image by image procession . at last we perform the function of fine tracking by dsp digital control . we develop a program to calculate the position of spot , in order to detect the precision 设计了一个与特定的ccd相机匹配的光学放大系统，从而可以获得高质量的激光光斑图像，通过数据采集对图像进行数字化，并进行了图像处理，滤除了噪声，分割了图像，利用dsp实现数字控制完成精跟踪的功能，同时编制了应用软件计算出光斑位置变化，从而可检测其精度。
The main contents are as follows : ( 1 ) by employing the direct method , the soliton periodic amplification system in optical fiber link with loss is considered , and the adiabatic solution ( slowly varying portion ) and first - order correction ( rapidly varying portion ) for a single soliton case are presented 本文的主要内容如下： ( 1 )利用直接扰动方法对周期放大系统进行了理论分析，给出孤子周期放大系统的绝热近似解和一级修正解的积分表达式，结果分析表明孤子在放大过程中一部分能量以色散波的形式流失，而这一色散波主要由孤子周期放大系统的一级修正解来刻画。
This paper presents a digital high precision signal power amplifier applied in the second winging of cvt for the high ac voltage measure in power system and analyses the intrinsic problem and disadvantage of cvt applied in power voltage measure system , based on the status in quo of cvt applied in power system 本文在基于cvt电容式电压互感器的电力系统电压测量现状的基础上，对存在的带负载问题进行了分析，提出了应用于电压互感器二次侧的一种基于dsp的数字化高精度信号放大系统。
Abstract : using the ray - tracing method , we demonstrate that a grating - telescope stretcher is the conjugation of a grating pair compressor . we present an analytical formula for calculating the phase dispersions of the grating - telescope stretcher . the computer simulation with the formula demonstrates that there exists an optimal material dispersion for an amplification system , with which we can achieve the largest dispersion - free bandwidth 文摘:用光线追迹法论证了光栅-球面镜系统与普通的光栅对系统是一对相位共轭元件，并提出了光栅-球面镜系统色散的解析计算公式，以及对一个典型的放大系统做了模拟.模拟结果表明，对于一个放大系统，存在一个最佳的材料色散，用它可以获得最大的无色散带宽
Taking stray light in " shenguang iii " as the study subject and basing on the basic principle of geometrical optics , applying the technological path of paraxial ray and real ray tracing , a new analytic way and data structure , which suits for the specific requirement in analysis and process of ghost images , is presented 本课题就是以“神光- ”激光装置中的杂散光为研究对象，针对高功率多程放大系统在鬼像分析与处理方面特殊要求，从光线光学的基本原理出发，应用近轴光线与空间光线追迹技术路线，提出一种新型的分析方法和数据结构。
