共查询到19条相似文献,搜索用时 93 毫秒
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全光非线性光孤子通信系统技术 总被引:1,自引:0,他引:1
近年来光孤子通信技术研究发展很快,各种新方案不断提出,各种系统设计与试验系统技术取得了重大突破,使光孤子通信实用化迈进了一大步。本文对光孤子通信技术的最新发展进行了综述与概括,指出了光孤子通信技术的发展趋势。 相似文献
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光孤子通信是一种新颖的非线性全光长距离通信,是新一代高速长距离通信的优选方案。它利用强脉冲在光纤传输中产生非线性压缩效应补偿脉冲的色散展宽效应,实现高速孤子脉冲稳定地传输。文章介绍了光孤子通信的特点、基本组成,叙述了光孤子通信的几种传输方式,分析了光孤子通信技术的优势:高容量、长距离、抗噪声干扰、低误码率。文章最后介绍了国内外光孤子通信的现状和技术发展前景。 相似文献
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光孤子通信系统具有许多线性光学通信系统无法比拟的优越性,但至今仍然没有一个基于光孤子的通信系统投入使用,这主要是由于光孤子本身存在的一些缺点造成的.介绍了光孤子和准光孤子的理论,通过数值模拟,找到了一类新的准光孤子,而标准的NLS孤子只是其中的一种特殊情况,并发现通过调节光纤的结构参数,就可以调整准光孤子的脉冲宽度,从... 相似文献
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Ming Xu Xueming Liu Ju Cai Xianglin Yang Yu Hu 《Journal of Infrared, Millimeter and Terahertz Waves》2001,22(9):1361-1369
In this paper, the three allocated schemes of dispersion-managed soliton are proposed on standard single-mode fiber. Adopting variational method and on the proposed schemes, the timing jitter introduced from the perturbations of amplifier spontaneous-emission (ASE) and cross-phase modulation in wavelength-division multiplexing is studied. Compared with performances of different system schemes, the principles of optimal allocated dispersion management are obtained, which can be used to optimal allocated dispersion managed soliton system. 相似文献
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分析了常规线性通信系统中存在的问题,提出了其解决方法,概述了孤子通信的优点及其发展简况,并着重对高速长距离全光孤子通信系统方案作了评述。 相似文献
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New schemes are described for the generation and detection of a dark soliton pseudorandom data train. The dark soliton data are generated by an AND gate and T-flip-flop circuits. The dark soliton is detected by using a one-bit-shifting technique with a Mach-Zehnder interferometer. Which converts the dark soliton signal into a non-return-to-zero (NRZ) signal 相似文献
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We describe various generation schemes that employ soliton dynamics in photonic-crystal fibers to generate a red-shifted femtosecond pulse with high efficiency. We then detail how to use this pulse along with the initial femtosecond laser pulse for coherent Raman experiments. We describe various measurement schemes that, though utilizing this pair of femtosecond pulses, mimick the preferred measurement scheme for coherent Raman microspectroscopy where one pulse is transform-limited and of picosecond duration; or for coherent Raman microscopy where both pulses are transform-limited and of picosecond duration. We finally discuss how to increase pulse energy and give some perspective on the realization of a coherent Raman endoscope based on soliton dynamics. 相似文献
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A routing all-optical switch in which the signal, consisting of a fundamental soliton, is directed into either of the output ports of a 2×2 nonlinear directional coupler is investigated by means of computer simulation. The routing is controlled by copropagating a controlling pulse along with the signal pulse. Four different schemes for doing this are explored where the polarization of the controlling pulse with respect to the signal soliton may be varied, or the controlling pulse may be launched into either of the input ports, or it may have a wavelength different from that of the signal. It is shown that only one of the schemes allows a high switching efficiency and enables distortionless propagation of the signal pulse through the coupler 相似文献
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针对色散管理孤子系统中孤子幅度、脉宽等参数的动态周期变化特性,采用时域和导频滤波复合控制方法,建立了光脉冲的传输方程,研究了短皮秒DM光孤子系统中控制孤子自频移(SSFS)影响的可行性和有效性,采用变分法分析了高速DM啁啾高斯准孤子在喇曼自频移条件下传输演化特性,采用沿线上导频滤波控制方法,将自频移控制在设计范围内,稳定了孤子中心频率。对40Gbit/s长距离高速DM孤子传输系统的传输特性进行了数值模拟,所得结果与理论分析完全一致。 相似文献
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本文采用行波解法求解了集总放大光纤孤子系统脉宽为皮秒量级含放大器增益的非线性薛定谔方程,得到了近似形式的解析解,并得到了孤子振幅、中心位置、相位的演化方程,在此基础上统一地研究了孤子传输的稳定性问题,得到了在集总放大光纤孤子系统中孤子能稳定传输的结论。 相似文献