共查询到17条相似文献,搜索用时 125 毫秒
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本文介绍了3种在全光时分复用系统中所采用的解复用器:一是基于Sagnac干涉仪的光纤非线性光环路镜解复用器,二是采用行波半导体激光放大器的非线性光环路镜解复用器,三是基于转换的四波混频解复用器。解复用器是全光信息处理中的关键技术之一。 相似文献
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介绍了用于光纤通信非线性补偿中的几种非线性光环路镜(NOLM,包括ANOLM、DALM、NALM、DILM、RA-NOLM、NBLM及DANLM)的构成和功能,给出了部分传输补偿实例,指出NOLM的发展趋势是小型化和集成化。 相似文献
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OBS(光突发交换)的设计目的就是有效利用光纤提供的丰富带宽,突发冲突是光突发交换网络发展中遇到的主要问题之一.介绍一种新的突发冲突解决机制,这种方法是基于突发分段和NOLM(非线性光环路镜)的.NOLM与SOA(半导体光放大器)配合为分段的突发包提供光缓冲和超高速光交换服务.还对突发长度符合Pareto分布和负指数分布的突发源在不同的传输负荷下,采用该冲突解决机制时的突发包丢失率进行了计算仿真. 相似文献
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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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Jianjun Yu Xueyan Zheng Peucheret C. Clausen A.T. Poulsen H.N. Jeppesen P. 《Lightwave Technology, Journal of》2000,18(7):1001-1006
All-optical wavelength conversion based on a nonlinear optical loop mirror (NOLM) at 40 Gb/s is demonstrated for the first time. The effect of walkoff time between control beam and signal beams is investigated when the NOLM is used as an all-optical wavelength converter or an all-optical demultiplexer 相似文献
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本文就群速度色散对非线性光纤环镜型OTDM解复用器的影响进行了理论与数值分析.首先给出了描述群速度色散与非线性效应之间相互作用的耦合非线性薛定谔方程组,然后用分步傅立叶方法对该方程组进行了数值求解.经分析指出,要达到一定的开关性能,孤子阶数、色散的正负、脉冲宽度及控制和信号脉冲之间的走离时间应满足一定的条件. 相似文献
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A theory is evaluated that allows the calculation of the worst-case input power penalty of an optical demultiplexer using a nonlinear optical loop mirror (NOLM) as high-speed switch. Due to finite NOLM extinction ratio and switching efficiency reduction there exists a strong dependence of the penalty on the bitrate of the drop channel, which is investigated for different 100 Gbit/s demultiplexer configurations. Assuming a NOLM of 2 km loop fiber, a 20-dB extinction ratio, and a switching pulse EDFA of 14.5 dBm, demultiplexing with a penalty of less than 7 dB should be possible for drop rates between 2.5 GHz and 11.1 GHz 相似文献
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A novel technique is proposed to characterize the power profile of short optical pulses using the transmission characteristic of a nonlinear optical loop mirror (NOLM). Under some assumptions, the power profile can be retrieved from pulse energy measurements at the NOLM output using a slow detection setup. As a fiber-based technique based on the Kerr effect, it does not require phase matching or tedious mechanical adjustments. The technique is able to characterize simultaneously pulse features from the picosecond to the nanosecond scale. 相似文献
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Demonstration of the nonlinear fibre loop mirror as an ultrafast all-optical demultiplexer 总被引:3,自引:0,他引:3
The all fibre nonlinear optical loop mirror (NOLM) is used in the two wavelength version to show good contrast stable switching of selected pulses from a stream of short pulses. The polarisation properties of the device enable operation as a genuine four port demultiplexer.<> 相似文献
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All-Optical Switches in Optical Time-Division Multiplexing Technology: Theory, Experience and Application 相似文献
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Ju Han Lee Oxenlwe L.K. Ibsen M. Berg K.S. Clausen A.T. Richardson D.J. Jeppesen P. 《Lightwave Technology, Journal of》2003,21(11):2518-2523
We demonstrate the use of fiber Bragg grating based pulse-shaping technology to provide timing jitter tolerant data demultiplexing in an 80 Gb/s all-optical time division multiplexing (OTDM) system. Error-free demultiplexing operation is achieved with /spl sim/6 ps timing jitter tolerance using superstructured fiber Bragg grating based 1.7 ps soliton to 10 ps rectangular pulse conversion at the switching pulse input to a nonlinear optical loop mirror (NOLM) demultiplexer comprising highly nonlinear dispersion shifted fiber (HNLF). A 2-dB power-penalty improvement is obtained compared to demultiplexing without the pulse-shaping grating. 相似文献