【摘要】：近幾年來隨著多媒體業(yè)務(wù)、網(wǎng)絡(luò)業(yè)務(wù)和寬帶綜合業(yè)務(wù)數(shù)字網(wǎng)的快速發(fā)展,全光通信已經(jīng)成為光通信發(fā)展的目標(biāo),為提高光通信系統(tǒng)容量與傳輸性能相繼提出OCDMA光碼分多址(Optical Code Division Multiple Access)概念。論文主要對(duì)非相干OCDMA系統(tǒng)進(jìn)行深入研究和仿真分析。論文首先調(diào)研了光通信發(fā)展的研究現(xiàn)狀及幾種主流的復(fù)用及尋址技術(shù),對(duì)光波分復(fù)用OWDM(Optical Wavelength Division Multiplexing)、光時(shí)分復(fù)用OTDM(Optical Time Division Multiplexing)、OCDMA技術(shù)的特性進(jìn)行了分析與對(duì)比,綜述了OCDMA系統(tǒng)實(shí)驗(yàn)及編解碼技術(shù)的研究現(xiàn)狀。論文針對(duì)非相干OCDMA編解碼系統(tǒng)進(jìn)行了理論分析,通過仿真軟件OptiSystem搭建了基于光纖延遲線、光纖布拉格光柵以及將兩者結(jié)合的二維非相干OCDMA通信傳輸系統(tǒng),并對(duì)三類系統(tǒng)進(jìn)行仿真與實(shí)驗(yàn)研究,實(shí)現(xiàn)了兩用戶速率為4Gbit/s的數(shù)據(jù)傳輸。仿真結(jié)果表明:基于光纖延遲線和光纖布拉格光柵的一維系統(tǒng)誤碼率更低,二維系統(tǒng)用戶容量更大,保密性更高。為提高系統(tǒng)性能,論文研究了光纖布拉格光柵反射譜譜寬及波長選擇對(duì)非相干OCDMA系統(tǒng)性能的影響。根據(jù)仿真實(shí)驗(yàn)的結(jié)論,利用光纖布拉格光柵的溫度特性,在OptiGrating軟件上設(shè)計(jì)出適用于二維非相干OCDMA系統(tǒng)的可調(diào)諧光纖布拉格光柵,實(shí)現(xiàn)編解碼的靈活可調(diào)。
[Abstract]:In recent years, with the rapid development of multimedia services, network services and broadband integrated services digital network, all-optical communication has become the goal of optical communication development. In order to improve the capacity and transmission performance of optical communication systems, the concept of OCDMA optical code division multiple access (Optical Code Division Multiple Access) is proposed one after another. In this paper, the incoherent OCDMA system is studied and simulated. Firstly, this paper investigates the research status of optical communication and several mainstream multiplexing and addressing technologies, and analyzes and compares the characteristics of optical wavelength division multiplexing (OWDM (Optical Wavelength Division Multiplexing),) optical time division multiplexing (OTDM) OTDM (Optical Time Division Multiplexing) / OCDMA technology. This paper summarizes the research status of OCDMA system experiment and codec technology. In this paper, the incoherent OCDMA coding and decoding system is analyzed theoretically, and the transmission system based on fiber delay line, fiber Bragg grating and two-dimensional incoherent OCDMA communication is built by simulation software OptiSystem. The simulation and experiment of three kinds of systems are carried out to realize the data transmission with two user rates of 4Gbit/s. The simulation results show that the BER of one-dimensional system based on fiber delay line and fiber Bragg grating is lower, the user capacity of two-dimensional system is larger and the security is higher. In order to improve the performance of fiber Bragg grating (FBG), the influence of spectrum width and wavelength selection on the performance of incoherent OCDMA system is studied. According to the conclusion of simulation experiment, using the temperature characteristic of fiber Bragg grating, a tunable fiber Bragg grating suitable for two-dimensional incoherent OCDMA system is designed on OptiGrating software.
【學(xué)位授予單位】：南京郵電大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN929.1

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