本文關(guān)鍵詞： 微波光子濾波器 負(fù)系數(shù) 跳頻 相位調(diào)制 單通帶 受激布里淵散射　出處：《天津理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著當(dāng)代通信學(xué)科在各個(gè)領(lǐng)域的廣泛應(yīng)用,人們對(duì)于通信技術(shù)的依賴程度也越來(lái)越高。而微波光子學(xué)是一門(mén)將微波信號(hào)應(yīng)用于光信號(hào)處理單元的交叉型學(xué)科,其在光纖通信網(wǎng)絡(luò),寬帶接入網(wǎng),傳感網(wǎng)等領(lǐng)域都具有廣闊的應(yīng)用前景,因而近年來(lái)得到了快速發(fā)展。微波光子濾波器通過(guò)集成技術(shù)將微波器件和光器件進(jìn)行結(jié)合,讓微波信號(hào)的處理延伸至光域。這樣既擺脫了傳統(tǒng)單一微波通信的不足,又保留了光纖通信高帶寬、高懫樣率、低損耗和抗電磁干擾等優(yōu)點(diǎn)。另一方面,微波光子濾波器的簡(jiǎn)易可調(diào)諧是其一大亮點(diǎn),在不改變結(jié)構(gòu)的情況下可對(duì)不同頻段的微波信號(hào)進(jìn)行濾波處理。本論文主要論述了可調(diào)諧帶通微波光子濾波器的三種設(shè)計(jì)方案,仿真模擬和相關(guān)實(shí)驗(yàn)驗(yàn)證了可調(diào)諧帶通微波光子濾波器的濾波特性。主要研究?jī)?nèi)容如下:第一,論文首先介紹了微波光子濾波器的研究背景,工作原理以及近年來(lái)國(guó)內(nèi)外研究現(xiàn)狀。論述了由相位調(diào)制器和強(qiáng)度調(diào)制器調(diào)制微波光信號(hào)的基礎(chǔ)理論,闡明了基于單模光纖和受激布里淵散射效應(yīng)實(shí)現(xiàn)的PM-IM轉(zhuǎn)換原理。第二,我們采用高斯寬譜光源作為光載波,利用MZI的連續(xù)切割特性,使得光載波抽頭呈現(xiàn)正弦函數(shù)的連續(xù)分布。據(jù)此提出了一種全新的設(shè)計(jì)方案——基于MZI的單通帶可調(diào)諧微波光子濾波器。該濾波器調(diào)諧范圍有一定程度的增加,即所設(shè)計(jì)的結(jié)構(gòu)有效地提高了濾波器的通帶調(diào)諧范圍。第三,設(shè)計(jì)了高Q值跳頻帶通微波光子濾波器方案。分析了級(jí)聯(lián)濾波器跳頻特性隨相關(guān)量的變化情況。結(jié)論顯示,基于該原理的微波光子濾波器結(jié)構(gòu),只要合理設(shè)計(jì)保偏光纖的長(zhǎng)度和段數(shù),改變偏振控制器狀態(tài)即可實(shí)現(xiàn)濾波器中心頻率的跳躍。第四,利用單模光纖中的受激布里淵散射效應(yīng)打破相位調(diào)制幅度平衡,完成PM-IM。經(jīng)探測(cè)器檢測(cè),所設(shè)計(jì)的濾波器可實(shí)現(xiàn)從1.2G-9.7GHz的自由調(diào)諧,具有很好的調(diào)諧特性。
[Abstract]:With the wide application of modern communication science in various fields, people rely more and more on communication technology, and microwave photonics is an interdisciplinary subject in which microwave signal is applied to optical signal processing unit. It has a wide application prospect in optical fiber communication network, broadband access network, sensor network and so on, so it has been developed rapidly in recent years. Microwave photonic filter combines microwave device and optical device through integrated technology. The microwave signal processing is extended to the optical domain. This not only eliminates the shortcomings of traditional single microwave communication, but also preserves the advantages of high bandwidth, high sample rate, low loss and anti-electromagnetic interference in optical fiber communication. The simple tunable microwave photonic filter is one of its bright spots. Microwave signal in different frequency band can be filtered without changing the structure. In this paper, three design schemes of tunable band-pass microwave photonic filter are discussed. Simulation and related experiments verify the filter characteristics of tunable band-pass microwave photonic filter. The main research contents are as follows: firstly, the background of microwave photonic filter is introduced. The basic theory of microwave optical signal modulated by phase modulator and intensity modulator is discussed, and the principle of PM-IM conversion based on single mode optical fiber and stimulated Brillouin scattering effect is expounded. We use Gao Si wide spectrum light source as optical carrier, using the continuous cutting characteristic of MZI. The optical carrier tap presents the continuous distribution of sinusoidal function. Based on this, a new design scheme, single pass tunable microwave photonic filter based on MZI, is proposed. The tuning range of the filter is increased to a certain extent. That is to say, the designed structure can effectively improve the bandpass tuning range of the filter. Thirdly, the scheme of high Q band-hopping bandpass microwave photonic filter is designed. The frequency hopping characteristics of cascaded filter are analyzed with the change of correlation quantity. The results show that, The structure of microwave photonic filter based on this principle, as long as the length and the number of segments of polarization maintaining fiber are reasonably designed and the state of polarization controller is changed, the central frequency of filter can be hopped. 4th, The phase modulation amplitude balance is broken by the stimulated Brillouin scattering effect in single-mode optical fiber and the PM-IM.The detector detects that the filter can be tuned freely from 1.2G-9.7GHz and has good tuning characteristics.
【學(xué)位授予單位】：天津理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TN713

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 付宏燕;歐海燕;陳達(dá)如;肖云;何賽靈;;基于摻Er光纖放大器的可調(diào)諧微波光子濾波器[J];光電子.激光;2007年11期

，

本文編號(hào)：1497222