【摘要】：光纖通信技術(shù)以其高帶寬、低損耗、高速率等特點(diǎn)已成為現(xiàn)代通信技術(shù)中極其重要的組成部分之一。隨著互聯(lián)網(wǎng)時代的到來,信息爆炸式增長給我們的生活帶來了巨大的變革。于此同時,垃圾短信的騷擾、帳號密碼的丟失、私密信息的泄露威脅著人們的日常生活。為了保護(hù)民眾隱私,建造和諧社會,需要一種保密光纖通信新技術(shù),用以改善現(xiàn)狀。光學(xué)分?jǐn)?shù)階傅里葉變換作為一種關(guān)于階數(shù)p的時頻轉(zhuǎn)換,可以在時域與頻域部分顯示信息,進(jìn)而實(shí)現(xiàn)信息的隱藏,這為光學(xué)分?jǐn)?shù)階傅里葉變換用于保密光纖通信技術(shù)研究提供了可能性。本文以分?jǐn)?shù)階傅里葉變換為切入點(diǎn),從麥克斯韋方程組出發(fā),運(yùn)用時空二元性理論,類比空間透鏡,明確了時間透鏡的兩種等效模型。經(jīng)過相關(guān)推導(dǎo),驗(yàn)證了利用時間透鏡實(shí)現(xiàn)光學(xué)分?jǐn)?shù)階傅里葉變換的可行性。在此基礎(chǔ)上,建立了光學(xué)分?jǐn)?shù)階傅里葉變換的控制數(shù)學(xué)模型,明確了關(guān)鍵的可控參數(shù)。通過MATLAB仿真,證明了變換階數(shù)p=1時的時頻變換特性,發(fā)現(xiàn)了光學(xué)分?jǐn)?shù)階傅里葉變換的擴(kuò)頻特性。搭建了基本的變換模塊,研究了變換階次p對于變換的影響,限定了變換階數(shù)p的范圍。運(yùn)用VPI軟件,通過3個可控參數(shù)的橫向和縱向?qū)Ρ?得出了可控參數(shù)的最低要求。針對整個系統(tǒng)的同步控制問題,研究了3種方案:基于波分復(fù)用的同步控制方法、基于延時迭代的同步控制方法、基于時鐘的同步控制方法。在VPI軟件和MATLAB聯(lián)合仿真的基礎(chǔ)上,分別搭建了3個方案對應(yīng)的10Gbps系統(tǒng),通過結(jié)果分析,3種方案都滿足通信的基本要求。通過對比分析3種方案的優(yōu)劣以及保密性能,明確了最優(yōu)方法。最后搭建了基于時鐘控制方案的4×10Gbps的光纖通信系統(tǒng),各信道均滿足了通信與保密的基本要求。
[Abstract]:Optical fiber communication technology has become one of the most important components of modern communication technology because of its characteristics of high bandwidth, low loss and high speed. With the advent of the Internet era, the explosive growth of information has brought tremendous changes to our lives. At the same time, the harassment of spam message, the loss of account code and the leakage of private information threaten people's daily life. In order to protect people's privacy and build a harmonious society, a new secure optical fiber communication technology is needed to improve the status quo. As a time-frequency conversion about order p, optical fractional Fourier transform can display information in time domain and frequency domain, and then realize information hiding. This provides the possibility for the optical fractional Fourier transform to be used in the research of secure optical fiber communication technology. Based on the fractional Fourier transform and Maxwell's equations, two equivalent models of time lens are defined by using the theory of space-time duality and analogy of spatial lens. The feasibility of optical fractional Fourier transform using time lens is verified by correlation derivation. On this basis, the control mathematical model of optical fractional Fourier transform is established, and the key controllable parameters are defined. By MATLAB simulation, the time-frequency transform characteristic of the transform order p = 1 is proved, and the spread spectrum characteristic of the optical fractional Fourier transform is found. The basic transformation module is built, the influence of transformation order p on transformation is studied, and the range of transformation order p is defined. By using VPI software, the minimum requirements of controllable parameters are obtained through the horizontal and longitudinal comparison of three controllable parameters. Aiming at the synchronization control problem of the whole system, three schemes are studied: synchronous control method based on wavelength division multiplexing (WDM), synchronization control method based on delay iteration and synchronization control method based on clock. Based on the joint simulation of VPI software and MATLAB, the corresponding 10Gbps systems of three schemes are built, and the results show that the three schemes can meet the basic requirements of communication. By comparing and analyzing the merits and demerits of the three schemes, the optimal method is defined. Finally, a 4 脳 10Gbps optical fiber communication system based on clock control scheme is built, and each channel meets the basic requirements of communication and security.
【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】：TN929.11

【參考文獻(xiàn)】

相關(guān)期刊論文 前4條

1 常碩;婁淑琴;李博;韓柏琳;;增大基于電光相位調(diào)制的時間透鏡孔徑的參數(shù)調(diào)制法[J];光學(xué)學(xué)報;2014年09期

2 丁帥;王秉中;葛廣頂;王多;趙德雙;;基于時間透鏡原理實(shí)現(xiàn)微波信號時間反演[J];物理學(xué)報;2012年06期

3 何舟;梅君瑤;王傳彪;梁曉軍;葉斐;李蔚;黃德修;;一種基于時間透鏡的10Gb/s無色散補(bǔ)償高速光纖通信系統(tǒng)[J];中國激光;2011年01期

4 李源;李蔚;楊克成;喬耀軍;梅君瑤;張歡;;Experimental implementation of an all-optical OFDM system based on time lenses[J];Chinese Optics Letters;2010年03期

相關(guān)碩士學(xué)位論文 前3條

1 張趙勇;時間透鏡和時間棱鏡在全光網(wǎng)絡(luò)中的應(yīng)用研究[D];華中科技大學(xué);2013年

2 范佑文;基于分?jǐn)?shù)階傅里葉變換的光通信接收端光信號預(yù)處理技術(shù)的研究[D];華中科技大學(xué);2013年

3 張歡;一種新穎的高速光纖頻域傳輸系統(tǒng)[D];華中科技大學(xué);2009年

，

本文編號：2177731