基于反向偏置PIN硅波导的全光逻辑门的研究

发布时间：2018-10-17 18:41

【摘要】：随着国际互联网的飞速发展,许多宽带业务应运而生,迫切需要发展超高速、超大容量的通信系统和计算机处理系统。然而由于电子学的瓶颈效应日趋明显,全光网(AON)和全光计算成了人们的奋斗目标,其中的关键之一就是要实现超高速的全光信号处理。全光逻辑器件是超快全光信号处理技术中的一个关键组成部分,其成熟程度直接决定着未来全光网络的发展程度。因此,全光逻辑器件的研究成为国内外的一个热点。本文围绕全光逻辑器件展开了研究。基于反向偏置PIN结硅波导中的简并四波混频(FWM)效应和非简并FWM效应,提出了一种开关键控(OOK)信号全光逻辑AND门和一种差分相移键控(DPSK)信号全光逻辑XOR门方案。建立了基于反向偏置PIN结硅波导的OOK信号全光逻辑AND门和DPSK信号全光逻辑XOR门的理论模型,并对其性能进行了仿真研究。研究结果表明:提出的方案可以实现逻辑AND门和逻辑XOR门。引入反向偏置PIN结,减小自由载流子寿命,提高了全光逻辑门输出功率;波导长度有最优值,使得全光逻辑门输出功率达到最大值;通过提高信号光功率,减小有效模场面积,能够提高全光逻辑门输出功率;两种全光逻辑门都对波长失谐量不敏感,波长可调谐范围宽。本文提出的基于反向偏置PIN结硅波导的全光逻辑门结构简单,易于集成,输出效率高,作为全光信号处理技术中的一个关键组成部分,可望应用到全光网和全光计算中。
[Abstract]:With the rapid development of the Internet, many broadband services emerge as the times require, and there is an urgent need to develop ultra-high-speed, super-capacity communication systems and computer processing systems. However, due to the increasingly obvious bottleneck effect of electronics, all-optical network (AON) and all-optical computing have become the goal of people, one of the key is to achieve ultra-high speed all-optical signal processing. All-optical logic device is a key component of ultra-fast all-optical signal processing technology. Its maturity directly determines the development of all-optical network in the future. Therefore, the research of all-optical logic devices has become a hot spot at home and abroad. This paper focuses on all optical logic devices. Based on the degenerate four-wave mixing (FWM) effect and non-degenerate FWM effect in the reverse bias PIN junction silicon waveguide, a novel all-optical logic AND gate for critical control (OOK) signal and an all-optical logic XOR gate for differential phase-shift keying (DPSK) signal are proposed. A theoretical model of OOK signal all-optical logic AND gate and DPSK signal all-optical logic XOR gate based on reverse bias PIN junction silicon waveguide is established, and its performance is simulated. The results show that the proposed scheme can realize logical AND gate and logical XOR gate. The reverse bias PIN junction is introduced to reduce the free carrier lifetime and improve the output power of the all-optical logic gate. The waveguide length has an optimal value, which makes the output power of the all-optical logic gate reach the maximum. By increasing the signal optical power, the effective mode field area is reduced. Both optical logic gates are insensitive to wavelength detuning and have a wide wavelength tunable range. An all-optical logic gate based on reverse bias PIN junction silicon waveguide is presented in this paper, which is simple in structure, easy to integrate and high in output efficiency. As a key component of all-optical signal processing technology, it is expected to be applied to all-optical network and all-optical computing.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN256

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