共查询到18条相似文献,搜索用时 104 毫秒
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报告了一个用于低频射频天线网络LOFAR的160 Gbit/s 演示平台.文章介绍了LOFAR网络结构以及用于LOFAR长臂的OTDM/WDM系统结构,回顾并探讨了用于实现160 Gbit/s系统的关键技术,并介绍了实验室中实现该160 Gbit/s OTDM/WDM演示平台所采用的技术方案。出于经济性考虑,所有的关键系统功能都采用自己搭建方案. 相似文献
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研究了基于半导体光放大器(SOA)结合延迟干涉仪(DI)结构的伞光波长转换.分析了SOA-DI结构的工作原理和DI参数的作用,进行了10 Gb/s和40 Gb/s归零码全光波长转换实验研究.实验结果表明,基于SOA中交叉增益调制(XGM)效应实现的波长转换为反相转换,输出信号消光比较低.当工作速率较高时波长转换信号质量明显恶化.而SOA-DI结构可实现同相波长转换并可改善波长转换信号的消光比,从而改善单个SOA实现波长转换的性能并提高系统的工作速率,该结构还具有结构简单、可光子集成等优点. 相似文献
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非等幅OTDM信号的全光时钟提取 总被引:6,自引:4,他引:2
理论上推导了非等幅均匀复用的OTDM信号中时钟分量与各路脉冲幅度的关系式,并分别从频域和时域的角度给出了利用以半导体光放大器(SOA)作为调制器的锁模光纤激光器进行时钟提取的物理机制,对时钟提取的物理过程给出了形象解释.实验上通过利用锁模光纤激光器成功地从非等幅均匀复用的8×2.5 GHz OTDM信号中提取了2.5 GHz单路时钟和20 GHz群路时钟光脉冲.利用该方案提取的时钟脉冲稳定性好,对偏振态不敏感,是较理想的时钟源.此技术可用于高速OTDM信号的时钟提取. 相似文献
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建立了基于集成双波导半导体光放大器的光开关(ITG-SOA-Switch)的理论分析模型.与半导体光放大器(SOA)的特性相比较表明,由于ITG-SOA-Switch合并了多种物理效应,故其静态增益饱和曲线在饱和功率点附近具有大幅度陡峭下降的独特性质.理论分析和10 Gbit/s波长转换模拟结果显示,恰当地选择输入抽运光的功率范围,ITG-SOA-Switch波长转换器输出转换光的消光比特性较之输入抽运光会有显著的改善.
关键词:
波长转换
半导体光放大器
集成双波导半导体光放大器
光开关 相似文献
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半导体光放大器引起的串扰及其抑制技术 总被引:1,自引:1,他引:0
由于半导体光放大器(SOA)的增益饱和效应,在波分复用系统中.每个信道的增益受到复用的其它信道的影响.SOA引起的各信道之间的串扰严重限制了其应用.理论研究了SOA增益饱和效应引起的信道间串扰.数值模拟了多路信道复用时系统的误码率随复用信道数和光功率的变化情况,发现随着复用信道数的增加SOA增益饱和引起的信道间串扰越来越严重.对SOA中串扰的抑制方法进行了理论和实验研究.数值模拟发现连续光注入可以抑制输出功率的波动,从而减小误码率,当复用10个信道时,连续光注入可以使功率代价减小2 dB;实验验证了两信道的40 Gb/s系统中,注入连续光可以减少SOA引起的信道间串扰. 相似文献
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10 GHz全光帧时钟提取的理论和实验研究 总被引:2,自引:2,他引:0
提出了一种新型的10 GHz全光帧时钟提取的提取方案。采用低精细度的法布里-珀罗(F-P)滤波器直接提出帧时钟,保证帧时钟的快速建立和快速消失。利用半导体光放大器(SOA)的自增益调制效应(SGM)对法布里-珀罗滤波器提取的帧时钟进行整形,降低帧时钟的幅度噪声。并推导了法布里-珀罗滤波器的精细度和半导体光放大器的自增益调制效应对帧时钟建立时间、消失时间的影响。通过理论分析表明,利用半导体光放大器的自增益调制效应可以降低帧时钟的幅度噪声并加快帧时钟建立速度。实验中,用上述方案对10.075 GHz的帧信号进行了全光帧时钟提取,得到了建立时间为8个信号周期,消失时间为22个信号周期,抖动为2.35 ps的帧时钟信号。 相似文献
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We express a photonic packet switch prototype based on optical label processing methods which dramatically increase the label processing capability. We experimentally demonstrate 40Gbit/s/port packet switching and optical buffering capabilities of the prototype. 相似文献
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We demonstrate the routing operation of optical packets by an optical packet switch consisting of an optical digital-to-analog conversion-type header processor, a wavelength converter using an electrically-tunable laser, and an arrayed-waveguide grating router. A packet transfer by two -bit optical header was achieved for the first time. 相似文献
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R. T. Hofmeister L. G. Kazovsky C. L. Lu P. Poggiolini F. Yang 《Fiber and Integrated Optics》1997,16(2):199-219
We are implementing and investigating CORD, a 2.5 Gbit/s/λ WDM packet-switched network testbed. CORD features: (i) contention resolution optics (CRO), which consist of optical switches and delay lines to perform all-optical packet contention resolution; (ii) multichannel subcarrier multiplexed (MSCM) signaling to transmit an 80 Mbit/s control channel and 2.5 Gbit/s payload data on the same wavelength; (iii) networkwide distributed slot synchronization technique with maximum slot jitter of ± 6.5 ns; (iv) novel ultrafast signaling synchronization using delay-line phase alignment for data recovery within 4 bits; and (v) pilot-tone payload data synchronization for clock recovery within 16 ns.
In this article, we describe the CORD network testbed and discuss the performance and scaling potential of the technologies developed for CORD. 相似文献
In this article, we describe the CORD network testbed and discuss the performance and scaling potential of the technologies developed for CORD. 相似文献
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半导体光放大器环镜的非归零信号时钟分量提取 总被引:1,自引:1,他引:0
对基于半导体光放大器非线性环镜的非归零信号时钟分量提取进行了数值模拟和实验研究。不仅采用半导体光放大器的分段模型分别对简化方案和抽运一探测方案进行了2.5Gbit/s下的数值模拟,而且实验上采用这两种方案分别将2.5Gbit/s的非归零信号转换为包含其时钟分量的相应的伪归零信号。模拟计算结果与实验结果吻合得很好。实验和模拟结果均表明:采用简化方案时转换输出的伪归零信号所包含的时钟分量的强度小于采用抽运一探测方案的情况。10Gbit/s下的模拟计算结果表明在码型效应尚能容忍的前提下简化方案工作速率的上限小于抽运一探测方案。 相似文献
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Ultra-high speed all-optical label processing methods are proposed and experimentally demonstrated. These methods dramatically increase the label processing capability. Optical packet switch (OPS) systems and networks based on OPS nodes are expressed as an application of optical processing technologies. First, the 40 Gbit/s/port OPS prototype with all-optical label processor, optical switch, optical buffer, and electronic scheduler is described. The feasibility of OPS networks is verified by experimental demonstrations. 相似文献
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We describe a novel type of an optical packet switch with an optical header processor based on optical signal processing and wavelength routing architecture. It consists of an optical digital-to-analog conversion-type header processor, wavelength selection portion with an electrically tunable laser, a wavelength converter based on a semiconductor optical amplifier (SOA), and wavelength routing by use of an arrayed waveguide grating (AWG), which is called a wavelength label switch (WLS). Wavelength switching of an electrically tunable laser, and wavelength conversion were successfully achieved within a few nanoseconds after recognition of an optical header using a two-bit optical header processor and a FPGA-based wavelength table. High-speed transfer performance of less than a few tens of nanoseconds and BER of less than 10-10 were verified in the wavelength routing operation among three assigned wavelengths. 相似文献