Question

十万火急！请帮我用英语翻译一下！

我毕业论文的英文摘要，由于我英语不好，所以我用软件翻译的，但是由于论文的了良，所以要重新翻译，我没办法了，求大家帮帮忙，专业词汇可一用*代替，关键是语法没错，不要用翻译软件。
作为感谢，我将把我所一积分奉上！！！

光通信系统正在变得日益复杂。这些系统通常包含多个信号通道、不同的拓扑结构、非线性器件和非高斯噪声源，对它们的设计和分析是相当的复杂和需要高强度劳动的。先进的软件工具使得这些系统的设计和分析变得迅速而有效。
WDM作为现在光通信的主流技术，对它的研究有重要的现实意义。在本论文将对WDM光传输系统的调制方式、EDFA和WDM光传输系统进行设计仿真，并得到一些有参考价值的结论。论文的主要工作及成果如下：首先对WDM光传输系统中使用的两种调制方式——直接调制和外调制进行比较，验证在不同速率下调制方式对系统的影响，比较两种调制方式性能的优劣；其次对掺饵光纤放大器(EDFA)进行设计仿真， 验证掺铒光纤的在不同长度、不同铒离子浓度、不同泵浦激光功率以及不同光信号功率条件下的增益，得到EDFA的特性以及设计EDFA时可供参考的数据；最后对WDM光传输系统进行仿真，验证8路、16路、32路信道下的系统性能，并提出一个方案，达到系统性能与传输速率的平衡。
不要用翻译软件！不要用翻译软件！不要用翻译软件！不要用翻译软件！不要用翻译软件！不要用翻译软件！不要用翻译软件！不要用翻译软件！不要用翻译软件！不要用翻译软件！不要用翻译软件！不要用翻译软件！不要用翻译软件！

Answer 1

The optical communication system is changing day by day complex. These systems usually contain many signal channel, the different topology, the non-linear component and the non- Gauss noise source, is suitable is complex to their design and the analysis and needs the high strength work. The advanced software tool causes these systems the design and divides 析变 rapid and is effective. WDM took the present optical communication the mainstream technology, has the important practical significance to its research. In the present paper to the WDM fiber-optic transmission system modulation way, EDFA and the WDM fiber-optic transmission system will carry on the design simulation, and will obtain some to have the reference value the conclusion. Paper main work and achievement as follows: First two kind of modulations ways □□direct-frequency modulation which uses for the WDM fiber-optic transmission system in and outside modulates carries on the comparison, confirms modulates the way under the different speed to the system the influence, compared with two kind of modulations ways performance fit and unfit quality; Next to mixes the bait optical fiber amplifier (EDFA) to carry on the design simulation, the confirmation mixes the erbium optical fiber in the different length, the different erbium ion concentration, the different pump laser power as well as under the different light signal power condition gain, obtains EDFA the characteristic as well as designs when EDFA may supply the reference the data; Finally carries on the simulation to the WDM fiber-optic transmission system, confirms 8 groups, 16 group, under 32 group channels system performances, and proposed a plan, achieves the system performance and the transmission speed balance. Question supplement that, Do not use the translation software! Do not use the translation software! Do not use the translation software! Do not use the translation software! Do not use the translation software! Do not use the translation software! Do not use the translation software! Do not use the translation software! Do not use the translation software! Do not use the translation software! Do not use the translation software! Do not use the translation software! Do not use the translation software

Answer 2

Optical communications systems are becoming increasingly complex. These systems usually contain a number of signal channels, different topological structure, nonlinear devices and non-Gaussian noise source. to their design and analysis is very complicated and needs of the high-intensity work. Advanced software tools to make these systems design and analysis has become quickly and effectively. WDM optical communication now as the mainstream technology, its research has important practical significance. In this paper will WDM transmission system modulation, and WDM EDFA optical transmission system design simulation, and get some valuable conclusions. The main thesis work and the results are as follows : First of WDM optical transmission systems used in the modulation -- Foreign direct modulation and modulation, certification in different modulation rate under the system, compared modulation performance of the merits; Second, erbium-doped fiber amplifier (EDFA) for design simulation, verification of the erbium-doped fiber in different length, different erbium ion concentration and pumped laser power and the different optical signal power under the conditions of the gain, be EDFA characteristics and the design of the EDFA available at the reference data; Finally, the WDM optical transmission systems for simulation, verification 8 Road, 16 Road, 32 Road channel system performance, and proposed a program to achieve system performance and the balance transfer rate.