本文關(guān)鍵詞：基于XGM的QD-SOA全光波長(zhǎng)轉(zhuǎn)換特性的研究　出處：《曲阜師范大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 光通信技術(shù) 量子點(diǎn) 單端耦合 雙端耦合 全光波長(zhǎng)轉(zhuǎn)換 增益恢復(fù)時(shí)間 啁啾 消光比

【摘要】：隨著互聯(lián)網(wǎng)和通信網(wǎng)中各種數(shù)據(jù)業(yè)務(wù)需求的快速增加,我們已進(jìn)入大數(shù)據(jù)時(shí)代,如云計(jì)算,物聯(lián)網(wǎng)等。下一代通信網(wǎng)的趨勢(shì)是一種高效、高速、大容量、智能交換的全光網(wǎng)絡(luò)。波長(zhǎng)轉(zhuǎn)換技術(shù)是全光網(wǎng)絡(luò)的關(guān)鍵技術(shù),可以提高全光網(wǎng)的波長(zhǎng)利用率,降低網(wǎng)絡(luò)阻塞,實(shí)現(xiàn)各種數(shù)據(jù)業(yè)務(wù)的不同協(xié)議轉(zhuǎn)換和透明傳輸。一般,量子點(diǎn)半導(dǎo)體光放大器(quantum-dot semiconductor optical amplifier,QD-SOA)具有優(yōu)異的非線(xiàn)性特性,如閾值電流低、微分增益高、溫度靈敏性低等,被廣泛應(yīng)用�；赒D-SOA交叉增益調(diào)制效應(yīng)(cross-gain modulation,XGM)的全光波長(zhǎng)轉(zhuǎn)換技術(shù)實(shí)現(xiàn)簡(jiǎn)單容易,轉(zhuǎn)換效率較高,一直作為研究的重點(diǎn)。但基于雙端耦合QD-SOA的波長(zhǎng)轉(zhuǎn)換器制作工藝?yán)щy,自發(fā)輻射噪聲較高,消光比退化嚴(yán)重,因此本文提出了一種基于單端耦合QD-SOA型結(jié)構(gòu)的全光波長(zhǎng)轉(zhuǎn)換器�；赒D-SOA-XGM的全光波長(zhǎng)轉(zhuǎn)換原理,本文分別介紹了QD-SOA的靜態(tài)和動(dòng)態(tài)分段模型,首先計(jì)算了雙端耦合QD-SOA全光波長(zhǎng)轉(zhuǎn)換器的主要特性,如消光比、增益恢復(fù)時(shí)間和啁啾。然后計(jì)算了單端耦合QD-SOA全光波長(zhǎng)轉(zhuǎn)換器變換光的消光比,并對(duì)比了雙端耦合方案下的變換光消光比。主要內(nèi)容包括以下幾方面:1、簡(jiǎn)述了全光波長(zhǎng)轉(zhuǎn)換技術(shù)對(duì)全光通信系統(tǒng)的意義以及國(guó)內(nèi)外研究概況。提出單端耦合QD-SOA-XGM型結(jié)構(gòu)的全光波長(zhǎng)轉(zhuǎn)換器作為研究對(duì)象。2、基于QD-SOA基本原理,分別建立靜態(tài)及動(dòng)態(tài)數(shù)值分析模型。詳細(xì)介紹了Newton法和四階Runge-Kutta法的主要內(nèi)容。重點(diǎn)分析了單端及雙端兩種方案下,QD-SOA有源區(qū)的靜態(tài)特性,包括載流子濃度分布和增益特性。3、以QD-SOA-XGM的全光波長(zhǎng)轉(zhuǎn)換原理為基礎(chǔ),采用Newton法和四階Runge-Kutta法求解速率方程和光場(chǎng)傳輸方程完成了雙端耦合方案下QD-SOA全光波長(zhǎng)轉(zhuǎn)換。詳細(xì)分析了雙端耦合QD-SOA-XGM全光波長(zhǎng)轉(zhuǎn)換的基本特性,如增益恢復(fù)時(shí)間(gain recovery time,GRT)、消光比(extinction ratio,ER)和啁啾(Chirp)。(1)對(duì)QD-SOA的GRT進(jìn)行數(shù)值研究。仿真結(jié)果顯示增大注入電流、增大探測(cè)光功率、增加有源區(qū)長(zhǎng)度、增大輔助光功率、減小橫截面積,都可以縮短QD-SOA的GRT。(2)詳細(xì)分析了雙端耦合QD-SOA自身及外部參數(shù)對(duì)變換光ER的影響。計(jì)算結(jié)果顯示增大注入電流、增大泵浦光功率、增大腔長(zhǎng)、減小探測(cè)光功率和波長(zhǎng)轉(zhuǎn)換間隔均能增大變換光ER。(3)對(duì)雙端耦合QD-SOA的變換光Chirp的影響因素進(jìn)行數(shù)值計(jì)算。結(jié)果顯示增加信號(hào)脈寬、減小注入電流、泵浦光ER和線(xiàn)寬增強(qiáng)因子均會(huì)減小變換光啁啾值。此外,減小泵浦光功率和增大探測(cè)光功率均減小變換光Chirp,但是輸入信號(hào)的波長(zhǎng)對(duì)Chirp影響不大。實(shí)際應(yīng)用中設(shè)置QD-SOA自身及外部參數(shù)時(shí)必須考慮啁啾效應(yīng)的影響,以減小誤碼率。4、單端耦合方案下,分析了QD-SOA自身及外部參數(shù)對(duì)變換光ER的影響。計(jì)算結(jié)果顯示增加泵浦光功率,減少探測(cè)光功率和波長(zhǎng)轉(zhuǎn)換間隔,增加注入電流和有源區(qū)長(zhǎng)度均能增加變換光ER。此外探測(cè)光較小時(shí),增大后端面反射率使單端耦合QD-SOA變換光消光比增大,當(dāng)探測(cè)光值較大時(shí),增大端面反射率使單端耦合QD-SOA變換光消光比減小。比較分析了單端耦合方案和雙端耦合方案下變換光的ER,結(jié)果表明單端耦合QD-SOA波長(zhǎng)轉(zhuǎn)換器的轉(zhuǎn)換光ER較大,說(shuō)明此結(jié)構(gòu)有效提高了變換光消光比的特性,較雙端耦合方案是一種改進(jìn)。
[Abstract]:With the rapid increase of various data services of Internet and communication network, we have entered the era of big data, cloud computing, networking and so on. The trend of next generation communication network is a kind of high efficient, high speed, large capacity, all-optical network intelligent switching. Wavelength conversion is a key technology of all-optical network, can improve the utilization the rate of all-optical network wavelength, reduce network congestion, different protocol conversion to achieve a variety of data services and transparent transmission. Generally, quantum dot semiconductor optical amplifier (quantum-dot semiconductor optical amplifier, QD-SOA) has excellent nonlinear characteristics, such as low threshold current, high differential gain, low temperature sensitivity, QD-SOA cross gain is widely used. Based on the modulation effect (cross-gain modulation, XGM) all-optical wavelength conversion technology is simple and easy to implement, high conversion efficiency, has been as the focus of the study. But based on the double end The coupling of QD-SOA wavelength converter production process difficult, spontaneous emission noise of high extinction ratio degradation is serious, so this paper puts forward a kind of all-optical wavelength converter with single port coupled type QD-SOA structure based on wavelength conversion using QD-SOA-XGM based on the principle, this paper introduces the segmentation model of QD-SOA static and dynamic, the main characteristics of double end coupling optical QD-SOA wavelength converter was firstly calculated, such as extinction ratio, gain recovery time and chirp. Single port coupled QD-SOA all-optical wavelength converter transforms the light extinction ratio is then calculated, and compared the transform of optical extinction double end coupling scheme than. The main contents include the following aspects: 1, the technology of all-optical wavelength conversion optical communication system and the significance of the research situation at home and abroad. The all-optical wavelength converter with single port coupled QD-SOA-XGM type structure as the research object of.2, based on QD-SOA basis The principle, established the static and dynamic numerical analysis model was introduced in detail. The main content of Newton method and four order Runge-Kutta method. Focus on the analysis of the single or double two schemes, QD-SOA static characteristics of the active region, including the distribution of the carrier concentration and gain characteristics of.3, based on the principle of wavelength conversion using QD-SOA-XGM using Newton method, and four order Runge-Kutta method for solving the rate equation and light propagation equations completed the double end coupling scheme of QD-SOA all-optical wavelength conversion. A detailed analysis of the double end coupling QD-SOA-XGM all-optical wavelength conversion characteristics, such as the gain recovery time (gain recovery time GRT (extinction), the extinction ratio of ratio, and ER) chirp (Chirp). (1) the numerical study of QD-SOA GRT. The simulation results show that increasing the injection current increases, probe power, increase the length of the active region, increasing the auxiliary optical power, reducing cross-sectional area, all Can shorten QD-SOA GRT. (2) the effect of double end coupling QD-SOA itself and external parameters on the detailed analysis of the optical ER transform. The calculation results show that increasing the injection current, increasing the pump power increases, the cavity length, lower probe power and wavelength conversion interval can increase the optical ER. transform (3) numerical calculation of double factors port coupled QD-SOA transform of optical Chirp effect. The results show that increasing the pulse width of the signal, reduce the injection current, the pump ER and the linewidth enhancement factor decreases with transform of optical chirp values. In addition, decrease and increase detection optical power decreased Chirp transform of optical pump power, but the input signal wavelength has little effect on Chirp. QD-SOA itself and the external parameter in the practical application must consider the influence of chirp effect, to reduce the error rate of.4, the single end coupling scheme, analyzes the influence of QD-SOA itself and external parameters on the optical transform ER. Meter Results show that increasing the pump power, probe power and reduce conversion interval, increase the length of injection current and the active region can increase ER. in addition to transform of optical probe light is small, after increasing the reflectivity that the single end coupling QD-SOA transform optical extinction ratio increases, when the probe is large, increasing the reflectivity ratio decreases. Single port coupled QD-SOA transform light extinction. A comparative analysis of the transform of optical coupling scheme and single ended double end coupling scheme under ER, results show that the conversion of single port coupled QD-SOA optical wavelength converter ER is large, indicating that this structure can effectively improve the transform of optical extinction ratio characteristics of a double end coupling scheme is an improvement.

【學(xué)位授予單位】：曲阜師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TN929.1

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相關(guān)期刊論文 前1條

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本文編號(hào)：1431309