發(fā)布時間：2018-06-02 19:07

  本文選題：正交振幅調(diào)制 + 偏振復用��； 參考：《電子科技大學》2017年碩士論文

【摘要】：光纖通信技術在過去的三十年間極大地改變了人們的生活。雖然整個光通信行業(yè)因為2000年互聯(lián)網(wǎng)泡沫的破滅受到了影響,但近年來由于高清電視、移動多媒體、大數(shù)據(jù)、云計算和社交網(wǎng)絡的興盛,互聯(lián)網(wǎng)對通信網(wǎng)絡傳輸帶寬的需求達到了前所未有的高度,進而推動了光通信行業(yè)的再一次興盛。高速率的光纖傳輸技術是研究者追求的主要方向。借此希望能夠滿足人們對信息的需求。本論文主要研究了高速的光纖傳輸系統(tǒng)的性能,分析了正交振幅調(diào)制和偏振復用的原理。利用光學仿真軟件VPI transmission maker 8.3搭建了200 Gbit/s、320Gbit/s、500 Gbit/s的16QAM和64QAM的偏振復用的光纖傳輸系統(tǒng)模型,研究和優(yōu)化了這兩種系統(tǒng)。本論文的主要內(nèi)容包括:(1)綜述了正交振幅調(diào)制和偏振復用的現(xiàn)狀和發(fā)展趨勢。介紹了光調(diào)制技術的原理,主要介紹了MZ調(diào)制器。對正交振幅調(diào)制技術進行了詳細的分析,接著分析了正交振幅調(diào)制的解調(diào)技術,包括直接解調(diào)和相干解調(diào),對相干解調(diào)進行了公式的推導,詳細的分析。介紹了偏振復用技術。首先講解了光的偏振,然后介紹了幾種表示偏振光的方法,有瓊斯矩陣方法、斯托克斯矢量法、以及在龐加萊球上各個點代表的偏振光。然后詳細分析了光纖中偏振模色散和偏振相關損耗的原理及其對系統(tǒng)的影響。最后介紹了解偏振復用的兩種方法,分別是相干解調(diào)和直接解調(diào)。對相干解調(diào)的原理進行了簡單的分析。對相干解調(diào)的原理及如何實現(xiàn)進行了詳細的分析。使用直接解偏振復用技術對信號進行解調(diào),省略了后期DSP對信號的處理,極大的簡化了系統(tǒng)。(2)利用上述的理論和分析,通過VPI transmission maker 8.3搭建了200 Gbit/s、320 Gbit/s、500 Gbit/s的16QAM的偏振復用的光纖傳輸系統(tǒng)模型。仿真系統(tǒng)包括信號的生成也就是發(fā)射機,光纖傳輸鏈路,信號的解調(diào)也就是光接收機。研究系統(tǒng)中的一些參數(shù)對信號產(chǎn)生的影響。優(yōu)化了光纖傳輸系統(tǒng)的性能。在BER=10-9的條件下,光信噪比以及光接受功率都能滿足光纖傳輸系統(tǒng)的要求。(3)利用VPI transmission maker 8.3搭建了200 Gbit/s、320 Gbit/s、500 Gbit/s的64QAM的偏振復用的光纖傳輸系統(tǒng)模型。研究了系統(tǒng)中的一些參數(shù)對信號產(chǎn)生的影響。優(yōu)化了光纖傳輸系統(tǒng)的性能。
[Abstract]:Optical fiber communication technology has greatly changed people's lives in the past 30 years. Although the entire optical communications industry was affected by the dotcom bust in 2000, in recent years, the rise of HDTV, mobile multimedia, big data, cloud computing and social networks, The demand of Internet for communication network bandwidth has reached an unprecedented height, which promotes the optical communication industry to flourish again. High-rate optical fiber transmission technology is the main direction pursued by researchers. In order to meet the information needs of people. In this paper, the performance of high-speed optical fiber transmission system is studied, and the principles of orthogonal amplitude modulation and polarization multiplexing are analyzed. The optical simulation software VPI transmission maker 8.3 is used to build the optical fiber transmission system model of 200Gbit / s320Gbit / s 500 Gbit/s 16QAM and 64QAM polarization multiplexing. The two systems are studied and optimized. The main contents of this thesis include: 1) the current situation and development trend of quadrature amplitude modulation and polarization multiplexing are reviewed. The principle of optical modulation technology is introduced, and the MZ modulator is mainly introduced. The technology of quadrature amplitude modulation is analyzed in detail, and the demodulation technology of quadrature amplitude modulation is analyzed, including direct demodulation and coherent demodulation. The formula of coherent demodulation is deduced and analyzed in detail. Polarization multiplexing technology is introduced. First, the polarization of light is explained, then several methods of representing polarized light are introduced, including Jones matrix method, Stokes vector method, and polarized light represented by each point on the Poincare sphere. Then, the principle of polarization mode dispersion (PMD) and polarization dependent loss in fiber and its influence on the system are analyzed in detail. Finally, two methods to understand polarization multiplexing are introduced, namely coherent demodulation and direct demodulation. The principle of coherent demodulation is simply analyzed. The principle of coherent demodulation and how to realize it are analyzed in detail. Using the direct depolarization multiplexing technique to demodulate the signal, omitting the late processing of the signal by DSP, greatly simplifying the system. The polarization-multiplexing optical fiber transmission system model of 200Gbit / s320Gbit / s ~ (500) Gbit/s 16QAM is built by VPI transmission maker 8.3. The simulation system includes signal generation, optical fiber transmission link, signal demodulation, and optical receiver. The influence of some parameters in the system on the signal production is studied. The performance of optical fiber transmission system is optimized. Under the condition of BER=10-9, the optical signal-to-noise ratio (SNR) and the optical receiving power can meet the requirements of the optical fiber transmission system. (3) using VPI transmission maker 8.3, the polarization multiplexing optical fiber transmission system model of 200Gbit / s ~ (320) Gbit / s ~ (500) Gbit/s 64QAM is built. The influence of some parameters on the signal production is studied. The performance of optical fiber transmission system is optimized.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN929.1

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本文編號：1969859