發(fā)布時(shí)間：2019-02-25 11:10

【摘要】：XPM效應(yīng)起源于光纖中的克爾非線(xiàn)性效應(yīng),即在WDM系統(tǒng)中,一個(gè)信道內(nèi)傳輸光波的光強(qiáng)的變化會(huì)通過(guò)交叉相位調(diào)制對(duì)其他信道的光波進(jìn)行相位調(diào)制,同時(shí)GVD將此相位調(diào)制轉(zhuǎn)化為幅度調(diào)制。XPM效應(yīng)引起的信號(hào)相位噪聲以及幅度噪聲,將會(huì)給相干光調(diào)制系統(tǒng)帶來(lái)極大損傷,且該損傷會(huì)隨著WDM系統(tǒng)中信道間隔的不斷減小以及入纖功率的增加而逐漸加強(qiáng)。在過(guò)去的XPM研究,主要考慮的是XPM效應(yīng)對(duì)單載波調(diào)制系統(tǒng)性能的影響,并對(duì)其產(chǎn)生的機(jī)理以及補(bǔ)償方法進(jìn)行了深入的探討和研究。但是,XPM效應(yīng)對(duì)多載波調(diào)制系統(tǒng)的影響,尤其是CO-OFDM系統(tǒng)的分析和深入研究屈指可數(shù)。CO-OFDM系統(tǒng)具有較高的PAPR且對(duì)正交性要求嚴(yán)格,勢(shì)必對(duì)XPM引起的相位噪聲非常敏感。因此XPM串?dāng)_是CO-OFDM系統(tǒng)中不可忽略的損傷,本論文將研究波分復(fù)用的OFDM系統(tǒng)中的XPM效應(yīng)。首先,本論文介紹CO-OFDM系統(tǒng)中非線(xiàn)性損傷機(jī)理,包括SPM、XPM、FWM等。然后通過(guò)求解頻域的非線(xiàn)性薛定諤方程,建立了基于Volterra級(jí)數(shù)的信道間XPM數(shù)學(xué)模型。采用Volterra級(jí)數(shù)對(duì)XPM進(jìn)行分析,可以同時(shí)計(jì)算光纖中的色散和XPM損傷,不需要再分開(kāi)建立GVD存在情況下信號(hào)幅度噪聲與相位噪聲之間的轉(zhuǎn)化關(guān)系式。其次,我們將此XPM數(shù)學(xué)模型拓展到色散管理系統(tǒng)中,并在此基礎(chǔ)上建立了可以用來(lái)預(yù)測(cè)XPM效應(yīng)的基于Volterra級(jí)數(shù)的傳輸濾波器模型。然后,我們將此濾波器模型應(yīng)用于OFDM/OOK混合系統(tǒng)中,并且預(yù)測(cè)出了OOK信道產(chǎn)生的XPM串?dāng)_對(duì)OFDM系統(tǒng)性能的影響。最后,考慮到XPM引起的相位噪聲嚴(yán)重影響CO-OFDM系統(tǒng)性能,我們提出使用CO-OFDM+DSB調(diào)制方式,來(lái)降低XPM相位噪聲對(duì)CO-OFDM系統(tǒng)性能的影響。隨著DSB調(diào)制頻率的增加,XPM引起的相位噪聲逐漸減小甚至可以忽略不計(jì)。然后,我們使用了OFDM WDM系統(tǒng)對(duì)其進(jìn)行仿真驗(yàn)證。
[Abstract]:The XPM effect originates from the Kerr nonlinear effect in the optical fiber, that is, in the WDM system, the change of the intensity of the light wave transmitted in one channel will modulate the light wave of the other channel by cross-phase modulation. At the same time, GVD transforms this phase modulation into amplitude modulation. The signal phase noise and amplitude noise caused by XPM effect will cause great damage to coherent optical modulation system. The damage increases with the decrease of channel spacing and the increase of fiber power in WDM system. In the past XPM research, the main consideration is the effect of XPM effect on the performance of single-carrier modulation system, and the mechanism of its generation and compensation methods have been deeply discussed and studied. However, the effect of XPM effect on multicarrier modulation systems, especially on the analysis and in-depth study of CO-OFDM systems, is very limited. CO-OFDM systems have high PAPR and strict requirements for orthogonality, which is bound to be very sensitive to the phase noise caused by XPM. Therefore, XPM crosstalk is a damage that can not be ignored in CO-OFDM system. This paper will study the XPM effect in WDM OFDM system. Firstly, this paper introduces the nonlinear damage mechanism of CO-OFDM system, including SPM,XPM,FWM and so on. Then, by solving the nonlinear Schrodinger equation in frequency domain, an inter-channel XPM mathematical model based on Volterra series is established. Using Volterra series to analyze XPM, the dispersion and XPM damage in optical fiber can be calculated simultaneously, and the transformation relationship between signal amplitude noise and phase noise in the presence of GVD does not need to be established separately. Secondly, we extend the XPM mathematical model to the dispersion management system, and establish a transmission filter model based on Volterra series which can be used to predict the XPM effect. Then, we apply the filter model to OFDM/OOK hybrid system, and predict the influence of XPM crosstalk generated by OOK channel on the performance of OFDM system. Finally, considering that the phase noise caused by XPM seriously affects the performance of CO-OFDM system, we propose to use CO-OFDM DSB modulation to reduce the influence of XPM phase noise on the performance of CO-OFDM system. With the increase of DSB modulation frequency, the phase noise caused by XPM is gradually reduced or even negligible. Then, we use the OFDM WDM system to simulate it.
【學(xué)位授予單位】：南京郵電大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類(lèi)號(hào)】：TN929.1

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 鐘先瓊,李大義,陳建國(guó);交叉相位調(diào)制不穩(wěn)定性的進(jìn)一步分析[J];激光技術(shù);2004年04期

2 張書(shū)敏,羅愛(ài)平,徐文成,呂福云;基于交叉相位調(diào)制的高階孤子壓縮效應(yīng)的研究[J];光電子·激光;2003年08期

3 熊杰;羅斌;潘煒;;多周期色散管理系統(tǒng)中交叉相位調(diào)制產(chǎn)生的相移研究[J];激光雜志;2006年03期

4 鐘先瓊,陳建國(guó),李大義;五階非線(xiàn)性色散緩變光纖負(fù)色散區(qū)的交叉相位調(diào)制非穩(wěn)[J];光電子·激光;2005年07期

5 王晶,苗洪利,馮啟元;交叉相位調(diào)制所致啁啾的研究[J];中國(guó)激光;2000年08期

6 楊慧敏;朱宏娜;;光纖中的交叉相位調(diào)制不穩(wěn)定性研究[J];光通信研究;2008年01期

7 張歡;李蔚;梅君瑤;王騰;遲楠;黃德修;;動(dòng)態(tài)光網(wǎng)絡(luò)中交叉相位調(diào)制和放大自發(fā)輻射噪聲積累效應(yīng)的傳輸代價(jià)[J];中國(guó)激光;2009年05期

8 李科;余震虹;;基于脈沖對(duì)交叉相位調(diào)制的亮脈沖的壓縮[J];光譜實(shí)驗(yàn)室;2013年02期

9 步揚(yáng),王向朝;基于頻域相位共軛技術(shù)的交叉相位調(diào)制所致失真的復(fù)原[J];物理學(xué)報(bào);2005年10期

10 鐘先瓊;向安平;;五階非線(xiàn)性下不同形狀脈沖對(duì)的交叉相位調(diào)制[J];激光技術(shù);2008年03期

相關(guān)會(huì)議論文 前2條

1 齊俊璇;文雙春;;交叉相位調(diào)制對(duì)密集波分復(fù)用系統(tǒng)信道容量的影響[A];全國(guó)第十二次光纖通信暨第十三屆集成光學(xué)學(xué)術(shù)會(huì)議論文集[C];2005年

2 鄭勉;邱昆;;WDM光網(wǎng)絡(luò)中交叉相位調(diào)制的研究[A];通信理論與信號(hào)處理新進(jìn)展——2005年通信理論與信號(hào)處理年會(huì)論文集[C];2005年

相關(guān)博士學(xué)位論文 前1條

1 熊杰;色散管理波分復(fù)用系統(tǒng)中交叉相位調(diào)制的研究[D];西南交通大學(xué);2005年

相關(guān)碩士學(xué)位論文 前8條

1 周洪茹;CO-OFDM系統(tǒng)中交叉相位調(diào)制效應(yīng)的研究[D];南京郵電大學(xué);2016年

2 李中桂;高速光纖通信系統(tǒng)中交叉相位調(diào)制效應(yīng)研究[D];電子科技大學(xué);2003年

3 齊俊璇;交叉相位調(diào)制對(duì)密集波分復(fù)用系統(tǒng)的影響[D];武漢理工大學(xué);2005年

4 劉穎;超常介質(zhì)中三、五階非線(xiàn)性引起的交叉相位調(diào)制非穩(wěn)研究[D];華東師范大學(xué);2013年

5 周萍;基于硅納米光波導(dǎo)交叉相位調(diào)制的碼型轉(zhuǎn)換研究[D];浙江大學(xué);2014年

6 余傳禧;超常介質(zhì)中高階色散和三、五階非線(xiàn)性對(duì)交叉相位調(diào)制不穩(wěn)定性的影響[D];華東師范大學(xué);2015年

7 潘彥銘;電磁誘導(dǎo)透明中交叉相位的微波調(diào)制[D];四川師范大學(xué);2014年

8 向磊;時(shí)域成像理論及應(yīng)用研究[D];華中科技大學(xué);2009年

，

本文編號(hào)：2430100