本文選題：超連續(xù)譜 + 色散圖譜�。� 參考：《北京交通大學(xué)》2014年博士論文

【摘要】：隨著云數(shù)據(jù)存儲、在線高清視頻等互聯(lián)網(wǎng)業(yè)務(wù)的迅猛發(fā)展,對傳輸容量需求呈現(xiàn)爆炸式增長,如何實現(xiàn)超大容量超遠(yuǎn)距離傳輸成為近幾年光通信技術(shù)研究的熱點。其中,超高速光時分復(fù)用技術(shù)(optical time division multiplexing,簡記為OTDM)作為實現(xiàn)未來超大容量通信的有效技術(shù)之一,研究者對其進行了廣泛而深入的研究。本文結(jié)合所承擔(dān)的國家“863”項目“160Gb/s一泵多纖光傳輸技術(shù)的研究”,針對超高速OTDM系統(tǒng)關(guān)鍵技術(shù),開展了一系列深入的理論、仿真及實驗研究,研究內(nèi)容包括展寬光源頻譜相干性和頻譜調(diào)控原理研究、100km傳輸鏈路色散管理設(shè)計、時鐘增強、基于電吸收調(diào)制器和高非線性光纖(highly non-linear fiber,簡記為HNLF)的解復(fù)用方案,全光波長交換,取得的主要創(chuàng)新成果如下： 1、研究了不同波形下生成超連續(xù)譜的相干性。理論并仿真研究無啁啾雙曲正割型皮秒脈沖泵浦在HNLF中產(chǎn)生的超連續(xù)譜的過程以及在光波分裂前后的相干度變化；研究在不同輸入噪聲下產(chǎn)生超連續(xù)譜的相干度變化；對比研究不同啁啾雙曲正割型脈沖下產(chǎn)生超連續(xù)譜的相干度變化。仿真得到超連續(xù)譜的相干性隨不同波形的變化規(guī)律。 2、研究了不同波形下生成超連續(xù)譜的平坦性。理論分析并仿真研究雙曲正割、高斯(m=1)、超高斯(m=5)脈沖形皮秒脈沖泵浦在HNLF產(chǎn)生的超連續(xù)譜,得到三種波形的泵浦脈沖在光纖不同位置的時頻域圖,并深入研究脈沖光源、HNLF參量共同作用對超連續(xù)譜的平坦度的影響,探討影響超連續(xù)譜平坦性機制,歸納總結(jié)影響超連續(xù)譜平坦性的因素和一般規(guī)律。 3、采用一種對稱的強色散圖譜以適合160Gbit/s超高速OTDM信號100km傳輸,實現(xiàn)了精確補償色散和色散斜率的同時抑制信道內(nèi)非線性損傷。在理論研究結(jié)果指導(dǎo)下,對160Gbit/s超高速時分復(fù)用信號的偽線性傳輸鏈路進行色散圖譜設(shè)計和仿真驗證,并搭建實驗系統(tǒng)進行實驗研究,最終實現(xiàn)160Gbit/s OTDM信號100km兩小時無誤碼傳輸。 4、理論分析并研究160Gbit/s OTDM信號中各階時鐘分量占比與復(fù)用信號幅度之間的聯(lián)系,采用基于級聯(lián)電吸收調(diào)制器和時鐘提取模塊組成的光電反饋環(huán),同時實現(xiàn)信號時鐘增強和解復(fù)用的功能,搭建160Gbit/s OTDM信號100km傳輸系統(tǒng)進行實驗研究,并成功實現(xiàn)160Gbit/s OTDM信號100km傳輸后時鐘得到明顯增強。 5、提出采用雙向使用HNLF結(jié)構(gòu)對80Gbit/s OTDM信號進行解復(fù)用方案,搭建80Gbit/s OTDM傳輸實驗系統(tǒng)對所提出方案進行驗證。所提出的解復(fù)用結(jié)構(gòu)不僅可以實現(xiàn)對單波80Gbit/s OTDM信號同時解復(fù)用出兩路無誤碼基帶信號,還可以實現(xiàn)對惡化的160Gbit/s (80Gbit/s×2) OTDM/WDM(wavelength division multiplexing,簡記為WDM)解復(fù)用和2R再生,并降低一半解復(fù)用器的數(shù)量。理論研究了存在非線性偏振旋轉(zhuǎn)效應(yīng)在內(nèi)的非線性光纖環(huán)鏡(nonlinear optical loop mirror,簡記為NOLM)解復(fù)用和2R再生原理,搭建基于NOLM的80Gbit/s OTDM系統(tǒng)進行實驗研究,實驗結(jié)果表明,采用基于NOLM的解復(fù)用結(jié)構(gòu)可以從惡化的80Gbit/s OTDM信號中成功的解復(fù)用出8路基帶信號,并且達(dá)到無誤碼。 6、提出基于雙向使用HNLF的波長交換結(jié)構(gòu)。通過此結(jié)構(gòu)分別利用自相位調(diào)制(self-phase modulation,簡記為SPM)和交叉相位調(diào)制(cross-phase modulation,簡記為XPM)效應(yīng)實現(xiàn)兩路惡化的OTDM信號之間的波長交換和2R再生功能,并對其進行實驗驗證。實驗結(jié)果顯示2R再生后的信號眼圖清晰且“眼”張開度大,解復(fù)用后的各信道均能達(dá)到無誤碼。其中基于SPM效應(yīng)的方案不需要額外的光源,系統(tǒng)結(jié)構(gòu)簡單且實現(xiàn)容易。基于XPM效應(yīng)的方案需要兩個額外的CW光源,但對不同信號之間的波長間隔沒有嚴(yán)格的要求,具有更靈活的波長間隔選擇。
[Abstract]:With the rapid development of cloud data storage, online high-definition video and other Internet services, the demand for transmission capacity is increasing explosively. How to realize ultra large capacity ultra long distance transmission has become a hot spot in recent years. The ultra high speed optical time division multiplexing (optical time division multiplexing, simply as OTDM) is a hot topic in recent years. It is one of the effective technologies to realize the future super large capacity communication. The researchers have carried out extensive and in-depth research on it. In this paper, in connection with the national "863" project "160Gb/s one pump multi fiber optical transmission technology", a series of in-depth theories, simulation and experimental research are carried out for the key technologies of the super high speed OTDM system. The capacity includes the study of spectrum coherence and spectrum regulation, 100km transmission link dispersion management design, clock enhancement, the demultiplexing scheme based on the electrical absorption modulator and the high non linear fiber (highly non-linear fiber, and HNLF), all optical wavelength switching, and the main innovation results are as follows:
1, the coherence of the supercontinuum generation under different waveforms is studied. The process of supercontinuum generation produced in HNLF without chirped hyperbolic secant type picosecond pulse and the change of coherence before and after the optical wave splitting are studied theoretically and simulated. The degree of coherence of Supercontinuum Generated by chirped hyperbolic secant pulses is simulated, and the coherence of supercontinuum varies with different waveforms.
2, we study the flatness of the supercontinuum generation under different waveforms. The theoretical analysis and Simulation of hyperbolic secant, Gauss (m=1), super Gauss (m=5) pulse picosecond pulse pumped in HNLF, the time and frequency domain diagram of the pump pulses in the different positions of the three kinds of waveforms are obtained, and the joint action of the pulse light source and the HNLF parameter is deeply studied. The influence of the flatness of supercontinuum on the flatness of supercontinuum is discussed, and the factors that affect the flatness of supercontinuum are summarized.
3, a symmetric strong dispersion map is adopted to fit the 160Gbit/s ultra high speed OTDM signal 100km transmission. The dispersion and dispersion slope can be compensated accurately and the nonlinear damage in the channel is suppressed simultaneously. Under the guidance of the theoretical research, the dispersion Atlas of the pseudo linear transmission link of the 160Gbit/s ultra high speed time division multiplexing signal is designed and simulated. Finally, the 160Gbit/s OTDM signal 100km is transmitted for two hours without error code transmission.
4, we analyze and study the relationship between the clock component occupying ratio of each order in 160Gbit/s OTDM signal and the amplitude of the multiplexed signal, and use the photoelectric feedback loop based on the cascaded electronic absorption modulator and the clock extraction module. At the same time, the function of signal clock enhancement and reuse is realized, and the 160Gbit/s OTDM signal 100km transmission system is set up for experimental research. The clock of 160Gbit/s OTDM signal is enhanced obviously after 100km transmission.
5, the dual use HNLF structure is used to demultiplexing the 80Gbit/s OTDM signal, and the 80Gbit/s OTDM transmission experiment system is built to verify the proposed scheme. The proposed demultiplexing structure can not only realize the single wave 80Gbit/s OTDM signal simultaneously demultiplexing the two path unmistakable baseband signals, but also realize the deteriorated 160Gb. It/s (80Gbit/s x 2) OTDM/WDM (wavelength division multiplexing, simply as WDM) demultiplexing and 2R regeneration, and reducing the number of half demultiplexers. The theory of nonlinear optical fiber loop mirrors (nonlinear optical loop mirror, concise) and the principle of regeneration are studied. The experimental study of the 80Gbit/s OTDM system shows that the demultiplexing structure based on NOLM can reuse the 8 path baseband signal successfully from the deteriorated 80Gbit/s OTDM signal and reach the no error code.
6, a wavelength switching structure based on two-way use of HNLF is proposed. By using this structure, the wavelength switching and 2R regeneration function between the two OTDM signals with two deteriorations are realized by using the self phase modulation (self-phase modulation, short note SPM) and cross phase modulation (cross-phase modulation, simply as XPM), and experiments are carried out to verify the experiment. The results show that the 2R regenerated signal has a clear eye map and the "eye" open degree is large. All channels after the demultiplexing can reach no error. The scheme based on the SPM effect does not need additional light source, and the system is simple and easy to realize. The scheme based on the XPM effect requires two additional CW sources, but the wavelength interval between different signals There is no strict requirement for a more flexible wavelength interval selection.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2014
【分類號】：TN929.1

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