高速光通信系统中的偏振模色散管理技术

偏振模色散已成为限制高速光通信系统性能的主要因素之一。介绍了高速光通信系统中的偏振模色散管理技术,通过比较,指出光域补偿方案最具发展前景。     

使用干涉法对电力系统OPGW光缆PMD的测量

文章对偏振模色散对光通信系统的影响作了简要说明,详细介绍了干涉法测量偏振模色散的原理并分别说明了干涉法测量偏振模色散的两种方式.结合实际OPGW光缆线路,给出了测试结果,测试结果表明,该光缆线路偏振模色散性能良好.     

高速光纤通信中的偏振模色散及其补偿技术

偏振模色散已成为当前发展下一代高速长距离光纤传输系统的主要限制因素。本文简要介绍了偏振模色散的概念、产生机制,并概括了目前高速光通信中常用的几种偏振模色散补偿技术。     

高速光通信系统中偏振模色散的补偿

光纤中偏振模色散已成为高速光通信系统增容的主要障碍,文章对现有的各种偏振模色散补偿方法进行了综合评述。认为用偏振控制器与保偏光纤构成的夺模色散自动补偿系统是一种首选方案。     

高速光纤通信中的偏振模色散及其补偿技术

偏振模色散巳成为当前发展下一代高速长距离光纤传输系统的主要限制因素。本简要介绍了偏振模色散的概念、产生机制，并概括了目前高速光通信中常用的几种偏振模色散初偿技术。     

啁啾光纤光栅中偏振模色散的研究

首先介绍了不同种双折射率差Δn的光纤制成的啁啾光纤光栅中偏振模色散现象 ,然后说明了光栅中偏振模色散的大小与 Δ n的相关性 ,并阐述了对用于色散补偿作用的啁啾光纤光栅中偏振模色散的消除 (补偿 )方法 ,最后指出利用啁啾光纤光栅中大的偏振模色散对高速光通信系统传输线路中偏振模色散的补偿方法。     

高速光通信系统中的色散及其补偿技术

分析了高速光通信系统中色度色散和偏振模色散的影响，并对有关的色散补偿技术作了较详细的介绍。     

利用线性啁啾光纤光栅补偿PMD的实验研究

对利用线性啁啾光纤光栅补偿偏振模色散(PMD)进行了实验研究.利用压电陶瓷的压电效应挤压线性啁啾光纤光栅使之产生双折射,用于补偿光通信系统中的偏振模色散.通过改变施加在压电陶瓷上的电压值,可实现对偏振模色散补偿量的线性调谐.实验结果与理论预期基本符合.     

偏振模色散补偿方案研究

阐述了偏振模色散的产生原因及其特性,介绍了几种高速光通信系统中基于电域和光域的偏振模色散补偿方案,对其性能和实现方式作了分析.波分复用技术是当前光通信网中常用的技术,为此,介绍了几种基于波分复用系统的PMD补偿方案,指出了各方案的优势以及不足之处.     

光通信系统中色散容限的分析

文章通过非线性薛定谔方程和主偏振态(PSP)模型.对单模光纤中色散引起的脉冲展宽进行了研究.通过详细计算,对光通信系统中的色度色散和偏振模色散(PMD)做出了合理的估计,并分析了色散容限对系统传输的影响.这些分析对实际系统设计具有一定参考意义.     

The accuracy assessment of different polarization mode dispersion models

Several polarization mode dispersion (PMD) models were developed to help understanding PMD effects and simplify the analysis regarding their impact on the system performance. Whether or not a PMD model can be used to accurately predict the system impairments depends on how well it approximates fiber PMD. In this paper, we assess the accuracy of six commonly used first- and second-order PMD models by comparing them with an all-order PMD model. Both PMD induced pulse broadening and optical-signal-to-noise-ratio (OSNR) penalties are determined, analyzed, and compared for each PMD model. To separate first- and higher-order PMD effects, we investigate the system performance with and without PMD compensation. We find that, compared with the all-order PMD model, all the known first- and second-order PMD models overestimate the PMD distortions, and the PMD models that do not contain higher than second-order PMD generate the largest deviation. Our results show that the first-order PMD model can be used to approximate the all-order PMD model when no PMD compensation is used, but none of the known PMD models can generate results close enough to those of the all-order PMD model for a PMD compensated system. This indicates that to accurately evaluate the performance of PMD mitigation techniques, the all-order PMD model has to be used.     

偏振模色散仿真器特性研究

光纤通信线路的偏振模色散已成为高速、长距离光纤通信系统发展的主要障碍之一 ,其特性、测量以及补偿方法的研究成为目前光纤通信研究热点之一。偏振模色散仿真器 ,用于仿真传输链路的偏振模色散特性 ,不仅可用于偏振模色散补偿器 ,也可用于高速长距离光纤通信系统的规划设计等。本文分析了光纤偏振模色散仿真器的研究现状 ,归纳总结了现有偏振模色散仿真器的设计原理和结构特征 ,并用蒙特卡罗法对常用的偏振模色散仿真器的特性进行了数值模拟     

Statistical PMD emulator using variable DGD elements

We report on a novel polarization-mode dispersion (PMD) emulator with exact Maxwellian statistics. The proposed PMD emulator was implemented by using variable differential group-delay elements and polarization controllers. Unlike the previous PMD emulators, the proposed PMD emulator could generate not only the first-order PMD with exact Maxwellian distribution, but also the second-order PMD.     

偏振模色散模拟器产生二阶PMD的理论研究

对基于保偏光纤（PMF）级联的偏振模色散模拟器（PMD emulator)产生的二阶PMD进行了数值模拟，结果表明，采用偏振控制器（PC）连接明显优于可旋转连接器（FC）连接，当级联段数N＝8时，PC连接的模拟器产生的二阶PMD与理论曲线基本符合；PMF的长度对PMD模拟器模拟二阶PMD并没有明显影响。     

Statistical correlation between first and second-order PMD

We investigate the statistical correlation between first- and second-order polarization mode dispersion (PMD) effects, which is important for PMD mitigation. The theoretical results are compared to numerical simulations and experimental data from a real high-PMD fiber. A new dependence between first- and second-order PMD is found. We show that the root mean square (RMS) value of the second-order PMD component, perpendicular to the PMD vector, increases with the length of the PMD vector     

The Second Order PMD in Optic Fiber and Compensation Experiment

1　Introduction　Inhigh speed /long distanceopticalfibertransmissionsystem ,PMDisoneofthemainfactorslimitingthebitrateandthetransmissiondistance ,becomingespeciallyimportantasthebitrateincreaseshigherthan 2 5Gb/s .TheinstantaneousPMDoftransmissionlineischangingfromtimetotimeandfromfrequencytofre quencyrandomly .InfrequencydomainPMDcanbeex pressedbytheTaylorexpansionatcenterfrequencyanddividedintofirstorder ,secondorder ,…ofwhichhigh erthansecondareallcalledhighorderPMD[1] .Fromfrequenc…     

Time evolution of polarization mode dispersion in optical fibers

The fluctuation of polarization mode dispersion (PMD) due to environmental change is an important issue for fiber-optic communication systems. We measure the time evolution of PMD for installed aerial and buried cables and for a spooled fiber in a temperature controlled chamber. The results show that PMD fluctuates much more rapidly for aerial cables than for buried cables. The magnitude of PMD is different for the three fibers and our results also show that the magnitude of PMD fluctuation depends on the magnitude of the PMD     

光纤和光缆的偏振模色散系数研究

综述了偏振模色散的概念、偏振模色散对光传输系统的影响、系统对单模光纤偏振模色散系数的要求,以及获得小的偏振模色散光纤和光缆的方法.     

PMD-Induced Outage Probability in an Optical Communication System With Fast Polarization Scramblers and Time-Varying PMD Sections

Polarization-mode-dispersion (PMD) tolerance of an optical communication system with distributed fast polarization scramblers (PS's) and time-varying PMD sections in terms of outage probability (OP) is investigated. We show that with a moderate number of PS's (up to 14), the PMD mitigation technique using distributed fast PS's and a typical forward-error correction increases the PMD tolerance by up to ~50% at an OP of 10^-5. We provide a scaling rule to link the PMD tolerance in the system with fixed PMD sections to that with time-varying PMD sections. The implication of the Hinge model is briefly discussed.     

Pulse distortion induced by polarization-mode dispersion and polarization-dependent loss in lightwave transmission systems

The combined effects of polarization-mode dispersion (PMD) and polarization-dependent loss (PDL) on pulse broadening in optical transmission links for both PMD uncompensated and compensated systems are investigated by numerical simulation. It is shown that, when PDL is large, PDL considerably reduces the efficiency of PMD compensation, which, we find, is mainly due to the increased higher order PMD caused by the combined effects of PMD and PDL, as well as nonorthogonal principal states of polarization.