本文選題：非線性效應(yīng) + 碼型轉(zhuǎn)換��； 參考：《電子科技大學(xué)》2017年碩士論文

【摘要】：因?yàn)殡娮油ㄐ旁O(shè)備對輸入功率和邏輯轉(zhuǎn)換速率等有一定的限制,不能滿足人們對更高速率、更長帶寬通信網(wǎng)絡(luò)的需要。于是研究者就展開了光通信的研究。而碼型轉(zhuǎn)換器是光通信中重要的通信設(shè)備。非歸零碼(Non-Return-to-Zero,NRZ)因?yàn)閭鬏斁嚯x短且有較高的色散容忍度而適用于短距離WDM系統(tǒng)中;而歸零碼(Return-to-Zero,RZ)因?yàn)閾碛休^好的非線性容忍度而常應(yīng)用于TDM中。因此NRZ碼和RZ碼之間的轉(zhuǎn)換有助于實(shí)現(xiàn)WDM和TDM系統(tǒng)之間的通信交流。本文利用的核心非線性效應(yīng)是四波混頻,并結(jié)合MATLAB仿真軟件實(shí)現(xiàn)NRZ到RZ的碼型轉(zhuǎn)換,主要內(nèi)容和結(jié)果如下:(1)從光傳輸方程出發(fā),分析耦合方程,重點(diǎn)說明了本文所采用的碼型轉(zhuǎn)換依據(jù)的核心非線性效應(yīng),即簡并FWM,并對碼型轉(zhuǎn)換的原理進(jìn)行了介紹。(2)設(shè)計(jì)出了光電碼型轉(zhuǎn)換仿真結(jié)構(gòu)裝置。該方案能完成光NRZ到電RZ的轉(zhuǎn)換。同時(shí),從時(shí)域、頻域和眼圖進(jìn)行MATLAB仿真,證明了碼型轉(zhuǎn)換的成功實(shí)現(xiàn)。并分析了輸入泵浦光功率和輸入時(shí)鐘寬度對生成的RZ信號的影響。以及交換輸入泵浦和NRZ信號位置后的碼型轉(zhuǎn)換仿真。結(jié)果表明:交換輸入泵浦和NRZ信號的位置都能很好的實(shí)現(xiàn)碼型轉(zhuǎn)換。電域下得到的兩路RZ信號的功率將會隨著輸入泵浦光功率的增加而增加。并且,得到的兩路RZ信號的時(shí)間寬度也會隨著輸入時(shí)鐘寬度的增加而增加。整個(gè)裝置在輸入功率很小的情況下就可以發(fā)生。整個(gè)轉(zhuǎn)換速率是40 Gb/s。(3)設(shè)計(jì)出了基于M-Z干涉結(jié)構(gòu)的全光碼型轉(zhuǎn)換方案。并采用MATLAB仿真驗(yàn)證了從NRZ到RZ全光碼型轉(zhuǎn)換的成功實(shí)現(xiàn)。采用和光電碼型轉(zhuǎn)換相同的討論分析法,得出了類似的結(jié)論,差別是能夠得到3路RZ信號。此外,還在此基礎(chǔ)上,仿真討論了XPM和SPM對轉(zhuǎn)換過程的影響。結(jié)果表明,這兩種非線性效應(yīng)會造成干涉不完全,影響碼型轉(zhuǎn)換。驗(yàn)證完成40 Gb/s的NRZ到3*40 Gb/s RZ的轉(zhuǎn)換。(4)設(shè)計(jì)出了基于Sagnac干涉結(jié)構(gòu)的全光碼型轉(zhuǎn)換方案。采用和M-Z干涉裝置相同的分析方法。區(qū)別M-Z方案,結(jié)果發(fā)現(xiàn):當(dāng)交換泵浦和NRZ碼的位置時(shí),不能實(shí)現(xiàn)碼型轉(zhuǎn)換。并且,不會存在干涉不完全現(xiàn)象,碼型轉(zhuǎn)換質(zhì)量很好。整個(gè)轉(zhuǎn)換速率是40 Gb/s。(5)對比總結(jié)本文設(shè)計(jì)的三種碼型轉(zhuǎn)換方案。
[Abstract]:Because electronic communication equipment has some limitations on input power and logic conversion rate, it can not meet the needs of higher rate and longer bandwidth communication network. So the researchers began the study of optical communication. Code converter is an important communication equipment in optical communication. Non-Return-to-Zero NRZ) is suitable for short range WDM systems because of its short transmission distance and high dispersion tolerance, and it is often used in TDM because of its good nonlinear tolerance. So the conversion between NRZ code and RZ code is helpful to realize the communication between WDM and TDM system. The core nonlinear effect used in this paper is four-wave mixing, and the NRZ to RZ code type conversion is realized with MATLAB simulation software. The main contents and results are as follows: 1) starting from the optical transmission equation, the coupling equation is analyzed. The core nonlinear effect of the code type conversion in this paper, that is, degenerate FWM, is emphatically explained, and the principle of the code type conversion is introduced. This scheme can complete the conversion of optical NRZ to electrical RZ. At the same time, the MATLAB simulation from time domain, frequency domain and eye diagram proves the successful realization of code conversion. The effects of input pump power and input clock width on the RZ signal are analyzed. And after switching input pump and NRZ signal position simulation. The results show that both the input pump and the position of the NRZ signal can be converted well. The power of the two RZ signals in the electric domain will increase with the increase of the input pump power. Moreover, the time width of the two RZ signals will increase with the increase of the input clock width. The whole device can happen when the input power is very low. The whole conversion rate is 40Gb / s. 3) an all-optical code conversion scheme based on M-Z interference structure is designed. The MATLAB simulation is used to verify the successful realization of all optical conversion from NRZ to RZ. Using the same discussion analysis method as optoelectronic code conversion, a similar conclusion is obtained. The difference is that three RZ signals can be obtained. In addition, the influence of XPM and SPM on the conversion process is simulated. The results show that these two nonlinear effects will result in incomplete interference and affect the pattern conversion. It is verified that the conversion from 40 Gb/s NRZ to 40 Gb/s RZ is completed. (4) A scheme of all-optical code conversion based on Sagnac interference structure is designed. The analysis method is the same as that of M-Z interferometer. By distinguishing M-Z scheme, it is found that when the pump is switched and the position of the NRZ code is switched, the code conversion cannot be realized. Moreover, there is no interference incomplete phenomenon, and the quality of code conversion is very good. The whole conversion rate is 40 GB / s. 5) the three schemes designed in this paper are compared and summarized.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN929.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 鐵生;;全光網(wǎng)絡(luò) 未來網(wǎng)絡(luò)發(fā)展趨勢[J];計(jì)算機(jī)與網(wǎng)絡(luò);2014年23期

2 吳彬;白光富;羅丹玲;鄒家輝;;基于光纖非線性效應(yīng)的全光再生器研究[J];激光雜志;2014年11期

3 任艷;宋牟平;;基于硅基微環(huán)諧振器交叉相位調(diào)制效應(yīng)的非歸零信號到歸零信號光調(diào)制格式轉(zhuǎn)換[J];光學(xué)學(xué)報(bào);2013年07期

4 鄧己媛;;基于SOA自相位調(diào)制的NRZ-PRZ轉(zhuǎn)換[J];信息與電腦(理論版);2011年11期

5 ;Suppression intra-channel four-wave mixing by strong dispersion management in 160 Gb/s OTDM RZ 100 km transmission[J];Chinese Science Bulletin;2011年25期

6 惠戰(zhàn)強(qiáng);;全光歸零(RZ)到非歸零(NRZ)碼型轉(zhuǎn)換技術(shù)研究進(jìn)展[J];激光與紅外;2011年05期

7 孟小俊;閆連山;潘煒;羅斌;易安林;李立廣;;基于光纖交叉相位調(diào)制的歸零到非歸零碼轉(zhuǎn)換[J];光學(xué)學(xué)報(bào);2011年04期

8 梁功權(quán);周雪芳;王天樞;李齊良;;OTDM網(wǎng)與WDM網(wǎng)接口間的碼型轉(zhuǎn)換技術(shù)研究[J];光通信技術(shù);2011年01期

9 孟小俊;閆連山;易安林;李立廣;;基于HNLF的RZ到NRZ的全光碼型轉(zhuǎn)換[J];光通信研究;2010年06期

10 ;基于硅基微環(huán)諧振器的WDM多通道RZ-NRZ碼型轉(zhuǎn)換的研究[J];光學(xué)與光電技術(shù);2010年06期

相關(guān)博士學(xué)位論文 前2條

1 呂博;光殘余邊帶調(diào)制碼型與光時(shí)分復(fù)用系統(tǒng)關(guān)鍵技術(shù)的研究[D];北京交通大學(xué);2009年

2 牛長流;光分組網(wǎng)中的全光信號處理技術(shù)研究[D];北京郵電大學(xué);2006年

相關(guān)碩士學(xué)位論文 前5條

1 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

2 趙崇俊;高速光纖通信系統(tǒng)中調(diào)制格式與四波混頻效應(yīng)研究[D];西安電子科技大學(xué);2012年

3 盧媛媛;高速全光調(diào)制碼型轉(zhuǎn)換的研究與應(yīng)用[D];上海交通大學(xué);2009年

4 許瑋;高速光纖通信系統(tǒng)中碼型調(diào)制技術(shù)與偏振模色散補(bǔ)償技術(shù)的研究[D];北京郵電大學(xué);2008年

5 王欣;高速光纖通信系統(tǒng)調(diào)制格式的研究[D];華中科技大學(xué);2007年

，

本文編號：1990830