【作者】 叶俊卿；

【导师】 张新亮；

【作者基本信息】 华中科技大学 ， 光学工程， 2006， 硕士

【摘要】 全光信号处理在高速光通信网络和光计算中有广泛应用,而全光逻辑门是光信号处理中的关键功能,是实现光分组交换、光计算和未来高速大容量光传输的关键器件[1-3]。半导体光放大器(SOA)因为具备体积小、工作波长范围宽、响应时间短及良好的非线性特性等优点,十分适合用来实现全光逻辑功能,成为研制高速全光逻辑器件的首选。本文在教育部新世纪优秀人才计划的支持下,对基于半导体光放大器(SOA)的全光逻辑或非门及全光逻辑与非门进行了理论和实验研究,具体工作如下:(1)在广泛查阅文献的基础上,分析了全光逻辑的研究背景、意义以及全光逻辑门在全光网络中的应用,概括了全光逻辑的实现方案和研究状况。(2)从半导体光放大器(SOA)中的载流子速率方程和光功率的传输方程出发,采用SOA的分段模型,数值模拟了SOA的稳态和动态增益饱和特性,并分析讨论了计算结果。(3)研究了基于SOA中交叉增益调制(XGM)效应的全光逻辑或非门。分析了这种方案的工作原理,数值模拟了10Gb/s NRZ信号逻辑或非运算过程。对10Gb/s逻辑或非运算进行了实验验证,对实验结果进行了讨论。实验结果和理论模拟结果符合较好。(4)研究了基于SOA中交叉增益调制(XGM)效应的全光逻辑与非门。数值模拟了全光逻辑与非门的工作过程,同时分析了各种参数对逻辑运算结果的影响。实验验证了10Gb/s NRZ信号的全光逻辑与非门,并对实验结果进行了详细的分析。实验结果和理论模拟结果符合较好。更多还原

【Abstract】 All-optical signal processing will play a great role in future high-speed optical networks and optical computing. The optical logic gates, as an important part of optical signal processing, have received much attention in recent years, and also are the crucial implements in packet switching system, optical computing and optical transmission in future. Semiconductor optical amplifiers (SOAs) have many advantages such as small size, wide bandwidth and low response time, which make them a strong candidate to realize all-optical logic gates. Supported by Program for New Century Excellent Talents in University (Grant No. 04-0715), theoretical and experimental research on all-optical logic gates based on semiconductor optical amplifier (SOA) are presented in this thesis. The main contents are listed as follows:(1) The research background, applications and achievements of all-optical logic gates are clarified.(2) Based on the carrier density rate equation, optical power propagation equation and sectional model of SOA, the static and dynamic characteristics of SOA are theoretically simulated.(3) A scheme for all-optical NOR gate based on SOA is investigated. The theoretical result for all-optical NOR gate at 10Gb/s is obtained. Some key factors in output performance are discussed. Experimental result for all-optical NOR gate at 10Gb/s is also obtained. There is a good agreement between theoretical and experimental results.(4) A scheme for all-optical NAND gate based on single-port-coupled SOAs is investigated. The working process of all-optical logic NAND gate is simulated. The all-optical logic NAND gate at 10 Gb/s is demonstrated experimentally. Theoretical calculation results are in agreement with the experimental results.更多还原