本文關(guān)鍵詞： 光學(xué)頻率梳 電光調(diào)制器 多模干涉耦合器　出處：《西安電子科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：為了提高光纖通信系統(tǒng)的傳輸容量,世界各地的科學(xué)家們對(duì)基于多載波的光纖通信系統(tǒng)進(jìn)行了深入的研究。多載波光源集成芯片是多載波光纖通信系統(tǒng)的核心器件之一。多載波光源的生成方法有很多,其中基于光學(xué)頻率梳的多載波光源生成方案具有系統(tǒng)結(jié)構(gòu)簡(jiǎn)單、載波數(shù)目可調(diào)、頻率間隔可調(diào)、載波頻率穩(wěn)定等優(yōu)點(diǎn)成為研究的熱點(diǎn)。本文重點(diǎn)關(guān)注基于多模干涉耦合器的光學(xué)頻率梳生成技術(shù)。本文首先介紹了多載波光纖通信的發(fā)展、幾種典型的多載波光源生成方案以及光學(xué)頻率梳在多載波光源生成和奈奎斯特脈沖生成兩方面的應(yīng)用;然后在分析了電光調(diào)制器和多模干涉耦合器的理論基礎(chǔ)上,提出了兩種不同的、基于多模干涉耦合器的光學(xué)頻率梳生成方案,并仿真驗(yàn)證了方案的正確性。本論文的主要工作有:提出了一種基于多模干涉耦合器的單邊帶調(diào)制器結(jié)構(gòu),并利用該調(diào)制器構(gòu)建了循環(huán)頻移器結(jié)構(gòu)用于生成光梳,分析了單邊帶調(diào)制的工作原理,并推導(dǎo)了理論表達(dá)公式,利用VPI仿真軟件驗(yàn)證了該方案的正確性,仿真結(jié)果顯示單邊帶調(diào)制器實(shí)現(xiàn)了抑制載波的單邊帶調(diào)制,諧波抑制比20dB,而循環(huán)頻移器實(shí)現(xiàn)了梳線數(shù)大于40、頻率間隔為5GHz的光學(xué)頻率梳;提出了一種基于多模干涉耦合器的新型MZ調(diào)制器結(jié)構(gòu),并構(gòu)建了一種基于該調(diào)制器級(jí)聯(lián)結(jié)構(gòu)的平坦光梳生成方案,分析了該調(diào)制器的工作原理,并推到了理論表達(dá)公式,利用VPI仿真軟件仿真驗(yàn)證了該方案的正確性,仿真結(jié)果顯示通過調(diào)整直流偏置電壓和微波信號(hào)的功率,單個(gè)調(diào)制器可以生成梳線數(shù)為5、平坦度小于0.1dB的平坦光梳,而調(diào)制器級(jí)聯(lián)結(jié)構(gòu)實(shí)現(xiàn)了梳線數(shù)25、平坦度小于0.2dB的平坦光梳,同時(shí)仿真驗(yàn)證了該方案生成的光梳頻率間隔可調(diào),并實(shí)現(xiàn)了間隔為5GHz和8GHz的平坦光梳。
[Abstract]:In order to improve the transmission capacity of optical fiber communication system, Scientists all over the world have made a deep research on the multi-carrier optical fiber communication system. The multi-carrier light source integrated chip is one of the core devices of the multi-carrier optical fiber communication system. There are many methods to generate the multi-carrier light source. The multi-carrier light source generation scheme based on optical frequency comb has the advantages of simple system structure, adjustable carrier number and adjustable frequency interval. The advantages of carrier frequency stability have become the focus of research. This paper focuses on the optical frequency comb generation technology based on multi-mode interference couplers. Firstly, this paper introduces the development of multi-carrier optical fiber communication. Several typical multi-carrier light source generation schemes and optical frequency comb applications in both multicarrier light source generation and Nyquist pulse generation are presented, and then the theory of electro-optic modulator and multi-mode interference coupler is analyzed. Two different optical frequency comb generation schemes based on multimode interference coupler are proposed, and the correctness of the scheme is verified by simulation. The main work of this paper is as follows: a single sideband modulator structure based on multimode interference coupler is proposed. The structure of cyclic frequency shifter is used to generate optical comb. The working principle of single sideband modulation is analyzed, and the theoretical expression formula is deduced. The correctness of the scheme is verified by VPI simulation software. The simulation results show that the single sideband modulator can suppress carrier single sideband modulation, the harmonic suppression ratio is 20 dB, and the cyclic frequency shifter realizes optical frequency comb with comb number greater than 40 and frequency interval of 5 GHz. In this paper, a new MZ modulator structure based on multimode interference coupler is proposed, and a flat comb generation scheme based on the cascade structure of the modulator is constructed. The working principle of the modulator is analyzed, and the theoretical expression formula is deduced. The correctness of the scheme is verified by VPI simulation software. The simulation results show that by adjusting the DC bias voltage and the power of microwave signal, a single modulator can generate a flat comb with a comb number of 5 and a flatness less than 0.1 dB. The modulator cascaded structure realizes the flat comb with the number of comb lines 25 and the flatness less than 0.2 dB. The simulation results show that the frequency interval of the optical comb generated by the proposed scheme is adjustable and the flat comb with intervals of 5GHz and 8GHz is realized.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TN929.11;TN761

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 程易;單邊帶調(diào)制器的研制[J];航空電子技術(shù);1990年04期

2 陳有禮;;數(shù)字式單邊帶調(diào)制器[J];通訊裝備;1978年04期

3 錢振林;王德培;楊玉琳;;多卜勒信號(hào)的模擬[J];兵工學(xué)報(bào);1981年01期

4 馬國(guó)勝;全通網(wǎng)絡(luò)在單邊帶調(diào)制器中的應(yīng)用[J];山東電子;2000年01期

5 李國(guó)杰;管德興;;微波集成多卜勒欺騙干擾模擬技術(shù)的研究[J];制導(dǎo)與引信;1984年04期

6 沈瑞祥，，林興平;6GHz微波單邊帶調(diào)制器[J];西北工業(yè)大學(xué)學(xué)報(bào);1994年02期

7 黃海源;CMOS集成電路應(yīng)用于單邊帶調(diào)制器[J];岳陽職工高等�？茖W(xué)校學(xué)報(bào);2001年02期

8 江仁高;;PIN二極管單邊帶調(diào)制器[J];無線電工程譯文;1973年02期

9 侯云哲;王肇穎;秦旭偉;劉士圓;羅莎;賈東方;葛春風(fēng);;利用單邊帶調(diào)制器實(shí)現(xiàn)對(duì)多波長(zhǎng)光纖激光器的高精度射頻控制調(diào)諧技術(shù)[J];中國(guó)激光;2014年08期

10 G.B.Postema;蒲先俊;;寬帶雷達(dá)波形的產(chǎn)生及性能分析[J];現(xiàn)代雷達(dá);1988年Z1期

相關(guān)碩士學(xué)位論文 前4條

1 況鑫;多載波光源集成芯片的研究及設(shè)計(jì)[D];西安電子科技大學(xué);2015年

2 胡靜;基于鈮酸鋰晶體的60GHz單邊帶調(diào)制器技術(shù)的研究[D];華中科技大學(xué);2007年

3 王紫霏;射頻電控光頻掃描解調(diào)光纖光柵傳感技術(shù)的研究[D];天津大學(xué);2014年

4 周浩;偏振控制技術(shù)實(shí)現(xiàn)多載波光源穩(wěn)定輸出的研究[D];北京郵電大學(xué);2013年

本文編號(hào)：1537156