【作者】 张印；

【导师】 张新亮；

【作者基本信息】 华中科技大学 ， 光电信息工程， 2008， 硕士

【摘要】 未来高速光网络要求避免电子瓶颈,实现全光信号处理,而全光缓存器是全光分组交换网的关键器件,近年来受到越来越广泛的关注。慢光效应有望用于实现全光缓存和全光存储,基于慢光效应的全光延时线在光交换、光计算、微波光子学等领域有广泛的应用前景。本文在国家高技术研究发展计划(NO.2006AA03Z414)、国家自然科学基金(NO.60407001)和教育部新世纪优秀人才计划(NO.NCET-04-0715)的资助下,对基于半导体光放大器(SOA)中四波混频效应产生慢光进行了理论和实验研究,取得了一定的研究成果。其主要研究工作如下:(1)在广泛查阅大量国内外文献的基础上,阐述了全光缓存技术和全光分组交换网的研究背景、全光缓存器在全光分组交换网中的应用,给出了慢光和快光概念,并综述了国内外慢光研究的概况,提出了基于半导体中的慢光效应研制可变延时全光缓存器的设想。(2)从载流子浓度的速率方程和光功率传输方程出发,对SOA的稳态特性和动态特性进行了数值模拟,研究了SOA的超快非线性动态特性。(3)建立了SOA近简并四波混频的理论模型,利用该模型研究了SOA中四波混频的载流子脉动效应产生慢光的机理,推导了混频增益、混频折射率和光速减慢因子。(4)对基于SOA中四波混频产生慢光进行了实验研究。实际观测到了探测光的延时,并对实验结果和影响实验结果的因素进行了分析和讨论。从理论上分析了限制探测光群速度减慢的因素和共轭光的存在对探测光群速度观测的影响。最后对SOA中的THz带宽慢光进行了理论分析。更多还原

【Abstract】 In future, it is crucial to develop all-optical signal processing to avoid the limits of electronic bottlenecks. All-optical buffers, as important components of optical packet switching networks, have received much attention in recent years. Slow light effect is promising to realize all-optical buffers and all-optical storages, variable all-optical delay lines using slow light effect attract increasingly due to their extensive potential applications in all-optical switching, optical computing, RF photonics, and so on. The research is supported by the National High Technology Development Program of China (No.2006AA03Z414), the National Natural Science Foundation of China (No.60407001), and Program for New Century Excellent Talents in University of Ministry of Education (No.NCET-04-0715). Theoretical and experimental researches on slow light via four-wave mixing in SOAs are presented in this dissertation. The main contents are listed as follows:(1)All-optical buffering used in all-optical packet switching networks is clarified. Conceptions of slow light and fast light are given,domestic and overseas achievements of slow light are summarized. Conceivableness for all-optical buffer using semiconductor based on slow light is proposed.(2)Based on the carrier density rate equation and optical power propagation equation, both the static, dynamic characteristics of SOA and the ultra-fast nonlinear dynamic characteristics of SOA are simulated theoretically.(3)A theoretical model of SOA for the nearly degenerate four-wave mixing is proposed. The theory of carrier density pulsation in SOA leading to realize slow light and fast light is analyzed by means of the model. The gain, the refraction index of SOA and slow down factor are given when the four-wave mixing takes place.(4)Experimental study of slow light via four-wave mixing in SOAs is presented. Investigation on the delay of the probe light in SOA is carried out and the performance of the delay of the probe light in SOAs is analyzed theoretically. Subsequently, THz-bandwidth tunable slow light in SOAs is also analyzed theoretically.更多还原