Polarisation fluctuations in a 147 km undersea lightwave cable during installation

We describe measurements of the time-dependent state of polarisation transmitted through a 147 km undersea cable during and after cable installation. The power spectrum of the Stokes parameters exhibits a lowpass characteristic with 0.24 Hz break frequency and ?29dB/decade roll-off during installation at 2 knots (3.7km/h) in 2000 m of water. After installation these parameters drop to 0.04Hz and ?24dB/ decade, respectively.     

基于GIS的主干光缆路由敷设线路设计探索

本文以江苏省灌云县城区为试验区,利用GIS技术以及ArcGIS等GIS专业软件,试图提出一种套基于GIS的主干光缆路由敷设线路设计方法。研究结果表明：利用GIS技术能够比较有效地实现自动化的主干光缆路由敷设线路设计。     

海底光缆交越处理方法

为了阐明海缆交越的工程处理方法,从海底光缆路由设计、桌面研究及海上勘察、交越施工三个方面总结其相应影响因素：海缆路由设计贯穿海缆交越处理全过程,影响因素包括交越角度、新建缆与被交越缆的缆型、交越点与水下设备距离、埋设区海缆交越施工工法及多条海缆交越,总结了各因素对被交越缆在长期运行、施工和维护的影响模式及对应解决方法;总结了桌面研究利用资料研究、实地走访的方式收集交越信息,阐明交越海上勘察的设备及测线布设方案;根据海缆施工特点,解释了海缆施工埋设犁及后冲埋工法的操作方式。此外,总结了海缆交越过程中需向被交越缆相关方发送三次交越通知,分别用作收集交越信息、确认勘察前交越方案和确认施工前交越方案。     

野战电缆故障检测仪的设计与实现

本文采用嵌入式设计方法,实现了电缆故障检测系统的自动化、集成化、便携化设计,能够完成绝缘阻值测量、电缆长度测量、回路电阻测量和故障定位等功能,可测试各种型号电缆上发生的短路、接地、接触不良等故障,用于实战有线通信和高频电缆的敷设与维护,可有效提高电缆线路故障的排除时间。     

Optical fiber cables for residential and business premises

This paper describes a new drop cable, a new cluster-type drop cable for residential premises, a new indoor cable, a new termination cable and a new riser cable for fiber distribution in residential and business premises. The structural design of these cables is investigated and the optimum structures for cost reduction of cable and installation are obtained. Based on the results, these cables are manufactured and their transmission and mechanical characteristics are confirmed to be stable     

基于GIS的主干光缆路由敷设条件评价研究

利用GIS技术以及ArcGIS等GIS专业软件,结合相关主干光缆路由敷设线路设计理论,以江苏省灌云县城区为试验区,试图提出一套基于GIS的主干光缆路由敷设条件评价方法和流程。首先,总结出影响主干光缆路由敷设线路选择的因子并进行量化;然后,结合利用专家打分法得到的影响因子权重计算出总的作用分值并生成最终评价结果。结果表明：利用GIS空间分析技术能够比较有效地进行主干光缆路由敷设条件评价,其结果可以为主干光缆敷设线路设计等提供参考。     

The Blown Fiber Cable

A radically new approach to optical fiber cable design and installation is described. Packages containing a number of optical fibers were drawn into preinstalled empty bores (tubes) using the viscous drag of air. The drag force acting on the fiber package is distributed along its length, which makes it possible to introduce fibers into complicated routes, with low strain. In this paper, we will concentrate mainly on the design of the fiber package, first from the point of view of the hydrodynamic forces acting on it during installation. This leads to a theoretical model for the installation process. Second, we shall consider the package as a subminiature optical fiber cable, and examine its optical performance during manufacture and temperature cycling, which leads to a theoretical model of the temperature performance of the package. Finally, we will describe a trial field installation using this cabling technique.     

新型无机绝缘防火电缆的研制

介绍了一种新型无机绝缘防火电缆的结构设计。详细阐述了绝缘材料与耐火膨胀材料的选择,电缆防火性能的试验研究,电缆技术指标及其性能和特点,敷设和应用情况。该新型无机绝缘防火电缆能弥补传统防火电缆的不足,且具有高性价比,应用前景十分广泛。     

ADSS光缆在工程中的使用

根据工程设计中的实践经验，详细介绍了全介质自承式（ADSS）光缆的结构及抗拉强度的计算方法，描述了高压输电线路中场强分布对ADSS光缆 的影响，并提出了在ADSS光缆工程设计及安装施工中应注意的问题。     

浅谈雷击光缆修复和基站防雷

详细描述了一起因雷击基站引接光缆引起的光缆故障及其抢修过程.对于该故障的原因进行了深入分析,指出正是由于基站设计、安装施工、防雷措施和光缆选型等方面存在的问题才导致了该故障的发生.并对如何预防同类故障提出了建议,以期对今后的实际工作有一定的参考作用.     

光缆通信线路防雷设计与安装

根据雷电的形成过程和雷击大地时雷电流的分布规律，分析了光缆遭遇雷击的原因，提出了避开雷区、雷点，阻止光缆诱导雷电，引接雷电入地的光缆防雷设计思路，介绍了光缆的防雷设计与安装的方法。     

Optical Fiber Cable Installation Techniques

When installing junction optical fiber cable, which essentially must be longer than conventional metallic-conductor cable to effectively reduce splice loss, the applied tensile load must be within tolerable limits to prevent an increase in loss and a decrease in lifetime. It has recently become possible to meet this requirement through the development of a new cable installation system which makes use of a modified cable pulling truck and a new intermediate cable pulling machine. Furthermore, this new installation system, capable of achieving a 1.0-1.5 km installation length for all types of cable accommodations, has already been put into practice. In addition, this paper presents three new cable installation techniques for facilitating subscriber optical fiber cable installations under various environmental conditions: a tension-controlled pulling technique, a cable pulling eye attachment technique, and a cost-effective damage-free cable installation technique in older buildings.     

Physical Design of the SL Repeater

SL undersea fiber-optic cable allows for the installation of multiple pairs of fibers in the same cable. Using the same high-pressure repeater housing as used in previous undersea systems (and thereby accruing the benefits of no tooling costs and proven handling methods), we are able to mount six optical regenerators. This group of regenerators will dissipate approximately 30 W in service. Previous undersea repeaters dissipated approximately 8 W and achieved a maximum internal temperature of 5° C above the repeater ambient. That might imply a temperature of 20° C above ambient for the SL repeater, which would be intolerably high for reliable undersea performance and longevity. The main thrust of the SL design was to lower this temperature rise. We have achieved a design which is capable of dissipating 30 W with only 4°C temperature rise. This paper describes the design steps necessary to achieve this result and examines the overall repeater structure showing its special design features for accommodating fiber sealing and jointing.     

新型高压光纤复合电缆防水牵引头的设计

对常规电缆牵引头存在的缺陷进行了分析,详细介绍了研制的新型高压光纤复合电缆防水牵引头的结构及其安装方法,并对该新型电缆防水牵引头进行了拉力及防水试验。该新型电缆防水牵引头已在用户现场施工应用时起到了重要作用。     

Initial Experience with the Milton Keynes Optical Fiber Cable TV Trial

This paper describes a small trial of an advanced cable TV network with evolutionary potential for the wideband local network of the future. Major features of the trial are optical fiber transmission throughout, switched program provision, and a star type of network. Initial experience is related giving both successes and difficulties encountered on design and installation phases. The conclusions point out the technology gap that exists for the wideband local network application and emphasize the potential of the network type used for enhanced services to the customer.     

接入网光缆工程施工新技术

介绍了当前在接入网光缆工程中出现的各种新的施工技术,如气吹微缆技术、路面微槽光缆敷设技术、排水管道光缆敷设技术,并讨论了这些新技术相关的施工方法、特点。与常规的管道、架空敷设方式相比,这些新的施工技术能灵活地适应接入网的工程环境,具有施工周期短、效率高,光纤容量大,易于扩容等特点,相信在将来的接入网光缆工程中会得到越来越广泛的应用。     

Polarisation fluctuation of submarine-cabled single-mode optical fibres in ocean installation

Polarisation fluctuations of the power spectrum with time in an optical fibre submarine cable installation are reported for the first time. It was found that the power spectrum of polarisation fluctuation was less than 60 Hz, and the maximum power spectrum was between 5Hz and 10Hz during the cable installation within a maximum cable tension of 18 kN (?1.8 tons) and a cable laying speed of 3.5 n mile/h, respectively.     

有线宽带工单管理系统的设计和实现

介绍自行开发的有线宽带工单管理系统的设计和实现,系统的各个功能模块和优缺点。该系统主要功能是对有线宽带的安装工单进行管理和安装质量的监督,为宽带业务提供支持。     

世界海底光缆通信线路建设及其技术发展状况

本文概述了世界海底光缆，特别是世界近海海底光缆通信线路建设状况及其在通信网中骨干作用，分析了其迅速发展的原因，并指出其技术发展趋向。文中，对海底光缆系统的拓外结构也作了介绍，并比较了干线分支形和花边形两种结构的优缺点。最后对海洋勘察、海缆路由和登陆点选择及其敷设与可靠性措施也作了简单的介绍。     

用于3G室内覆盖的微型干扰消除直放站的研究

3G网络的数据业务主要发生在室内,深度覆盖是当前运营商亟待解决的问题.文章介绍了一种采用数字回声消除技术的微型干扰消除直放站,它采用一体化设计,将施主天线和重发天线集成到其中,用户无需进行额外的布线和装配天线,方便安装.实际应用表明:该直放站是一种解决因建筑物导致的信号衰减和信号盲区等室内深度覆盖问题的经济、快速的解决...