In the second chapter, a theoretical model of FRAs is presented and the main characteristics of FRA are discussed. 接着在第二章中对FRA的理论模型进行了较全面的分析,并讨论了FRA的主要工作特性。
This research provides a guide to the fabrication of practical FRAs. 我们的研究对实际制作光纤拉曼放大器提供了指导。
Common examples of derivatives include swaps, options, futures and FRAs. 衍生工具的常见例子包括互换(掉期)、选择权(期权)、期货和远期。
Gain saturation is a significant phenomenon of fiber Raman amplifiers ( FRAs). 增益饱和是光纤拉曼放大领域非常重要的现象。
It is shown that the saturation power of FRAs decreases with the pump power, and gain saturation is easier to occur in the forward pump scheme than in the backward pump scheme. 同时指出,光纤拉曼放大器的饱和功率随泵浦功率的增大而减小,相对于后向泵浦方式,增益饱和更容易在前向泵浦方式下产生。
FRAs, FRA Rates and Sensitivity Analysis FRA及其价格确定与敏感性分析
Fibre Raman Amplifiers ( FRAs), which use the intrinsic nonlinear properties of transmission fibers to obtain signal amplification, are the most promising in broadband optical amplifiers owning its unique performances. 光纤拉曼放大器(FRA)利用传输光纤本身的非线性效应实现光放大,由于其自身的优良特性,已成为宽带放大器中最有前景的竞争者。
In this thesis, the main study of FRAs includes: First, the numerical algorithm is developed to solve the coupled Raman equations, and implemented in MATLAB ( noises are neglected). 本文对光纤拉曼放大器的研究包括以下内容:第一设计拉曼耦合方程组的计算机数值求解方法(不考虑噪声),并在MATLAB下编程实现。
Basing on the evaluation about the connotation and uses of FRAs, this paper discussed the determination of FRA rates and analysed the sensitivity of FRA rates on the changes of interest rates. 在对FRA的基本内涵与作用进行评价的基础上,探讨了FRA的定价机制,分析了FRA利率对市场利率变化的敏感性。
Conclusions The habitual abortion is correlative with the higher expression rate of chromosome fragile sites, but seems independent of the distribution of Fras. 结论习惯性流产与染色体脆性位点频率增高有关与脆性位点分布关系不大。
The gain and noise properties of FRAs have been characterized systematically. 对光纤喇曼放大器的增益和噪声特性进行了系统的理论研究和总结。
The Runge Kutta interative algorithm is used to solve the standard propagation equations of fiber Raman amplifiers ( FRAs). 提出了一种直接用龙格库塔迭代算法全面求解光纤拉曼放大器传输方程的方法。
Clinical research on intense pulsed light device with multiple wavelengths in treatment of nevus flammeus The propagation equations of FRAs pumped backward at multiple wavelengths are solved with two steps. 多波长光谱治疗机治疗鲜红斑痣的临床研究通过研究多波长后向泵浦光纤拉曼放大器的传输方程,分两步来确定各泵浦波的频率及输入功率的大小。
This algorithm can be used to the performance evaluation of all kinds of FRAs. 3. An efficient method for the gain or noise optimization of FRA has been proposed. 该算法可用于对各种光纤喇曼放大器的增益和噪声特性进行快速、准确的评价。3.提出了一种高效的宽带光纤喇曼放大器优化设计方法。
For synthesizing all sorts of effects which may happen during the process of signal amplification, this algorithm is more adapted to the facts. After simplifying the mathematics 'model of FRAs, the numerical method of backward-pumped FRAs is successfully accomplished. 在算法中,综合考虑了在信号放大过程中可能发生的各种效应,因此更符合实际,对数学模型简化后,实现了后向泵浦FRA这一边值问题的数值求解。
The simulations of multiple FRAs showed that the calculation efficiency and stability of these shooting algorithms are improved dramatically when compared with the conventional shooting algorithm. ( 1.2) An efficient method for extraction of input pump powers from pump power integrals was proposed. 多个FRA的仿真计算结果表明,相对于简单打靶法这3种打靶法的计算效率和稳定性均有极大的提高。(2)提出了一种由泵浦功率积分求解泵浦输入功率的高效方法。
The main points are as follows: 1. The gain and noise properties of FRAs have been characterized systematically. 本论文的主要内容如下:1.对光纤喇曼放大器的增益和噪声特性进行了系统的理论研究和总结。
In order to verify the feasibility of this intelligent implement method, detailed schemes of software and hardware were presented and design of multiple intelligent FRAs were carried out. 为验证所提方法的可行性,文中给出了详细的软、硬件实现方案,并进行了实验验证。
The influence of the design parameters, such as pumping geometry, gain level, fiber length, and input signal power level, on the performance of FRAs have been analyzed. 2. 重点研究分析了泵浦方式、增益水平、光纤长度、信道功率水平等参数对放大器增益和噪声特性的影响。