To accelerate the development of next generation high dwdm system , the pape r also researches the property of gain . based on optical wave nonlinear transmission equation , the gain model of fra is established . by the way of numerical analysis , it is obtained that the gain of fra has relation with pump power , input signal wave power , the effective area and absorption of fiber . the obtained conclusion has definite instruction to the design of fra 为了促进下一代超高速dwdm密集波分复用技术的发展，本文还研究了光纤喇曼放大器的增益特性，根据光波非线性传输方程建立光纤喇曼放大器增益模型，通过数值模拟分析了泵浦波功率、信号输入光功率、以及光纤有效面积和损耗对光纤喇曼放大器增益的影响，得出了一些对光纤喇曼放大器的设计有一定的指导意义的结论。
Moreover , compensated for aberration of ball lens by designing phase compensating plate to get a higher energy utilization rate . third , combining with the light beam property of dwdm system , put forward taking fresnel lens array as fiber arrayed collimator , designed differently structured lens array and discovered the arrayed collimator loss property , which compared with the existing parameter of fiber collimator , embodies many advantages as arrayed collimator 结合密集波分复用系统的光束耦合特点，提出用菲涅尔透镜列阵做光纤阵列准直器，并设计不同结构的透镜列阵，得出了该阵列准直器的光束耦合损耗特征，与现有的光纤准直器的参数相比，体现出用菲涅尔透镜列阵作阵列光纤准直器的诸多优势。
But the development of dwdm ca n ' t be satisfied for finite wavelengths . however aowc can make the wavelengths reused . a novel project is explored for signal pulse compression and shaping by utilizing the co - propagating second order super - gauss control pulse and gauss signal pulse in semiconductor optical amplifier 随着超高速密集波分复用( dwdm )和光时分复用( otdm )的日趋发展，要求信号脉冲的脉冲宽度越来越窄和复用的信道数也越来越多，但有限的波长资源不能满足dwdm的发展要求，而波长转换技术可以提高信号波长的重复利用率。
A new laser source of optical communication , erbium - ytterbium codoped phosphate glass waveguide laser that was provided with more prominent performance than semiconductor distribution feedback ( dfb ) laser , has been investigated globally from 1990s . the laser can meet many rigorous demands of wdm systems . the 1 . 54 m laser emitted by the laser accords with the interrelated standard of international telecommunications union ( itu ) , therefore , a splendent foreground can be predicted about this kind of laser in future optical communication 基于铒、镱掺杂磷酸盐玻璃基片的光波导激光器是一种新型通信光源,具有传统的分布反馈半导体激光器所不能比拟的优点,能满足波分复用/密集波分复用技术对光源提出的诸多高新要求,所发射的1 . 54 m激光符合国际电信联盟规范,在未来光通信中有着广阔的发展前景。
Generation of multi - wavelength signals and ultra - short pulses are of great importance for a wide range of applications such as in wavelength - division - multiplexed ( wdm ) and optical time - division - multiplexed ( otdm ) fiber communication systems , fiber sensing , nonlinear optics , optical instrument testing , and time - resolved spectroscopy 密集波分复用( dwdm )和光时分复用( otdm )是实现光纤通信系统升级扩容的有效途径,而多波长信号及高重复频率的超短光脉冲的产生则是与其相对应的两种关键技术。
