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扼要叙述了非线性光环镜的构成及工作原理 ,介绍了它在全光开关、全光解复用、信号再生、逻辑运算、信号格式变换及全光波长变换等信息技术领域的超快速响应中的应用。 相似文献
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In this paper,several applications in all-optical signal processing based on a semiconductor optical amplifier (SOA) and variable delayed interferometers (DIs) have been experimentally demonstrated.Wavelength converter based on a nonlinear polarization switch (NPS) and a DI is proposed and presented for the wavelength conversion of nonretum-to-zero (NRZ) signals.An alloptical nonretum-to-zero to return-to-zero (NRZ-to-RZ)format converter with tunable duty cycles is achieved by the DI with variable delays.The 40 Gb/s reconfigurable optical OR/NOR gate in a single SOA,followed a tunable optical bandpass filter (OBF) and a DI,optical 2R regeneration using an SOA-DI are investigated.It is found that this combinative realization of filters has been endowed with great flexibility and quality for 40 Gb/s optical logic and 2R regeneration. 相似文献
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利用半导体光放大器和滤波器组合实现高速波长转换和码型转换 总被引:2,自引:1,他引:2
将半导体光放大器(SOA)和滤波器组合使用是实现高速全光信号处理的有效途径。利用半导体光放大器和带宽为0.32nm的可调窄带滤波器同时实现了40Gbit/s的非归零(NRZ)信号的反相波长转换(WC)和非归零到伪归零(PRZ)信号的码型转换,波长转换和码型转换的结果差异取决于滤波器中心波长相对于探测光波长的失谐量。当滤波器的失谐量为-0.24nm时,输出反相的波长转换,此时滤波器起到加速半导体光放大器增益恢复的功能。当滤波器失谐量为 0.41nm和-0.48nm时,得到非归零到伪归零的码型转换,并且产生的伪归零脉冲分别出现在非归零信号的上升沿和下降沿,此时滤波器的作用是将探测光的相位信息转换为强度信息,并且该码型转换结果兼有波长转换的功能。 相似文献
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Min Yong Jeon Young Ahn Leem Dong Churl Kim Eundeok Sim Sung‐Bock Kim Hyunsung Ko Dae‐Su Yee Kyung Hyun Park 《ETRI Journal》2007,29(5):633-640
We report an experimental demonstration of 40 Gbps all‐optical 3R regeneration with all‐optical clock recovery based on InP semiconductor devices. We also obtain all optical non‐return‐to‐zero to return‐to‐zero (NRZ‐to‐RZ) format conversion using the recovered clock signal at 10 Gbps and 40 Gbps. It leads to a good performance using a Mach‐Zehnder interferometric wavelength converter and a self‐pulsating laser diode (LD). The self‐pulsating LD serves a recovered clock, which has an rms timing jitter as low as sub‐picosecond. In the case of 3R regeneration of RZ data, we achieve a 1.0 dB power penalty at 10?9 BER after demultiplexing 40 Gbps to 10 Gbps with an eletro‐absorption modulator. The regenerated 3R data shows stable error‐free operation with no BER floor for all channels. The combination of these functional devices provides all‐optical 3R regeneration with NRZ‐to‐RZ conversion. 相似文献
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基于半导体光放大器的四波混频型全光波长转换器 总被引:4,自引:1,他引:3
本文报道了基于自行研制的半导体光放大器(SOA)的四波混频(FWM)型全光波长转换,采用环型腔掺铒光纤激光器(EDFL)作为泵浦源,实现了转换波长的连续可调。并就波长转换间距、光放大器的小信号增益和输入泵浦光功率对转换效率的影响进行了理论与实验分析,结果表明高的SOA增益和较大的输入泵浦光功率须利于转换效率的提高。 相似文献
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核心通信网的光分组交换 总被引:1,自引:0,他引:1
文章首先简单说明了新一代通信网需要使用分级交换的由来。接着详细叙述了光分组交换在未来光通信网的应用,包括节点结构、分组格式、输入、输出接口和一些特别重要的技术,如再生、同步、信头处理、缓冲、空间交换和波长转换等。 相似文献
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Blumenthal D.J. Bowers J.E. Rau L. Hsu-Feng Chou Rangarajan S. Wei Wang Poulsen K.N. 《Communications Magazine, IEEE》2003,41(2):S23-S29
Optical packet switching promises to bring the flexibility and efficiency of the Internet to transparent optical networking with bit rates extending beyond that currently available with electronic router technologies. New optical signal processing techniques have been demonstrated that enable routing at bit rates from 10 Gb/s to beyond 40 Gb/s. We review these signal processing techniques and how all-optical-wavelength converter technology can be used to implement packet switching functions. Specific approaches that utilize-ultra-fast all-optical nonlinear fiber wavelength converters and monolithically integrated optical wavelength converters are discussed and research results presented. 相似文献
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This paper reports a review of the different technologies used for wavelength conversion in wavelength-division multiplexed networks. The strengths and the weaknesses of the competing technologies, including optoelectronic wavelength conversion, four-wave mixing, difference frequency generation, cross-gain and cross-phase modulation in semiconductor optical amplifiers, are stressed with regard to conversion speed, transparency and regeneration of the converted signal. 相似文献
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The nonlinear behavior of inhomogeneously excited 1.55-μm wavelength multielectrode distributed-feedback laser diodes, such as self pulsation and multistability for both injection current and for injection light, is described. Wavelength bistability is also described. Optical signal processing applications are experimentally demonstrated; they include optical logic circuits, optical memories, an optical demultiplexer, an optical timing extractor, and optical regenerative repeaters 相似文献
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利用光子晶体光纤实现全光波长转换研究 总被引:1,自引:1,他引:1
作为自动交换光网络中的核心器件,全光波长转换器在网络中发挥着重要作用。重点介绍基于光纤参量放大器实现全光波长变换的进展和工作原理。提出利用光子晶体光纤的强非线性来实现全光波长转换,在未来光通信领域将具有广阔的应用前景。 相似文献
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基于半导体光放大器中交叉偏振调制效应的波长转换器 总被引:4,自引:2,他引:4
了改善基于半导体光放大器(SOA)中交叉偏振调制效应(CPM)的波长转换器的转换信号码型效应,对交叉偏振调制一半导体光放大器波长转换器的工作原理进行了分析;通过讨论交叉偏振调制一半导体光放大器波长转换脉冲的上升沿和下降沿的频率啁啾,结合滤波器的透过谱特性,提出了一种利用滤波器的波长正斜率边和波长负斜率边分别对正相转换信号和反相转换信号进行码型优化的方案,并进行了实验验证。在信号码率为10Gb/s的交叉偏振调制一半导体光放大器波长转换实验中,采用光带宽为0.3nm的JDS滤波器优化转换信号的波形,基本消除了转换信号中长“1”码和长“0”码的码型效应,并将正相转换信号和反相转换信号的功率代价分别改善了3dB以上。 相似文献
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吴重庆 《激光与光电子学进展》2007,44(11):12-17
半导体光放大器(SOA)中非线性系数约为普通光纤的109倍,为光子晶体光纤的107倍.有4种光-光互作用,即交叉增益调制、交叉相位调制、交叉偏振调制和四波混频,可以灵活地组成各种光信号处理器件,如波长变换器、全光触发器、全光逻辑、全光时钟恢复、全光缓存器,正成为整个光信号处理的基础.介绍了这些技术的同时,分析当前应用的制约因素,指出半导体光放大器集成是下一步发展的必然趋势. 相似文献
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利用TOAD实现10 Gbit/s全光非归零码到归零码的转换 总被引:2,自引:4,他引:2
利用从非归零(NRZ)信号中全光提取的时钟,采用太赫兹光非对称解复用器(TOAD)实现了10 Gbit/s非归零码到归零(RZ)码的码型转换。非归零信号采用半导体光放大器(SOA)进行时钟分量增强并用平面波导阵列(AWG)滤出相应的伪归零(PRZ)信号,然后采用半导体光放大器注入锁模光纤环形激光器进行时钟提取,提取的时钟信号和待转换的非归零信号分别作为抽运光和探测光输入太赫兹光非对称解复用器,在其中进行码型转换。转换后输出的归零信号的质量仅由恢复的时钟信号和非归零信号的质量决定,受太赫兹光非对称解复用器中半导体光放大器增益恢复时间的影响极小。实验测得转换后的归零信号消光比为8.7dB,码型效应非常低,其光谱明显展宽.并且出现谱间隔为0.08nm的多峰结构,与10 Gbit/s的比特速率相对应。该方法对时钟信号的码型效应有一定的容忍度。 相似文献
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实验研究了基于半导体光放大器(SOA)的四波混频(FWM)效应的单抽运光正交频分复用(OFDM)信号的波长变换系统.信号光源和抽运光源分别由两个不同输出波长的可调分布反馈式激光器(DFB-LD)产生.信号光源经2.5 Gb/s OFDM的电信号直接调制后再和抽运光源耦合,经光放大器后在SOA实现波长变换.实验结果显示,耦合信号经SOA四波混频效应后,产生新波长的信号光将携带OFDM信号,且转换效率与信号光和抽运光的功率、波长以及两者的偏振夹角有关.同时也测量了转换的OFDM信号的功率-误码曲线和接收星座图. 相似文献
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《Quantum Electronics, IEEE Journal of》2009,45(1):34-41