Design and characteristics of multi-hundred-core optical-fiber cable for use in subscriber feeder lines

This paper describes a design method for optical-fiber cable consisting of optical-fiber ribbons encased in loose tubes. The influence of excess fiber length on optical loss in a loose tube is evaluated and the required clearance is obtained. The optimum combination of the clearance and the tube stranding pitch is obtained in order to suppress fiber strain. The tube dimensions are also discussed and are determined to protect fiber ribbons from lateral load. A 600-fiber-structure cable is manufactured according to the obtained design results; the transmission and mechanical performances are confirmed to be excellent.     

认识光纤光缆

光纤光缆是新一代的网络传输介质,与铜质介质相比,光纤无论是在安全性、可靠性还是网络性能方面都有了很大的提高。文章从光纤技术的发展特点、光缆新技术的应用等方面,介绍了网络发展对光纤提出的新要求以及不断涌现的新型光纤光缆,最后谈了光纤光缆技术与产业发展中几个值得思考的问题。     

电力光缆辅助分析管理系统研发

随着电力系统光缆通信的快速发展,保障电力光纤运行的可靠性是需要解决的问题。文章开发电力光缆辅助分析系统,实现基于地理位置的电力光缆线路管理、光缆的故障统计分析、光缆纤芯的负载预警和光缆线路光功率的预测功能,提高国网公司电力光缆运行管理智能化。     

Development of optical fiber/power line composite tether cable for remotely operated unmanned submersible

A new type of tether cable with high quality signal transmission characteristics was developed by adopting optical fibers. As the tether cable is subject to frequent and various mechanical and thermal loads under the severe operating conditions in the offshore environment, the greatest care should be paid to the design of its structure to preserve the optical fibers from those loads. This paper describes the design requirements and the characteristics of the optical fiber/power line composite tether cable under the loads such as tensile loading, bending, twisting, water pressure, and cable heating. The termination of the tether cable is also discussed. This tether cable has been in practical use for remotely operated submersible MARCAS whose mission is inspection and location of the submarine telecommunication cables.     

Recent advances in submarine optical fiber cable transmission systems in Japan

Submarine optical fiber cable transmission systems are promising successors to existing submarine coaxial cable systems. This paper will review the history and the state of the art of the submarine optical fiber cable transmission technology, and the submarine optical fiber cable transmission systems named FS-400M and OS-280M being developed by NTT and KDD, respectively, in Japan.     

光缆接续的方法和技巧

简单介绍光缆、光缆接头盒与光缆接续所需要的仪器和设备，并从实际出发详细介绍光缆接续-的方法和技巧。     

Studies on designing of submarine optical fiber cable

This paper describes important studies necessary to design submarine optical fiber cables. These include a study for deciding the optimum single-mode fiber parameters to suppress losses during cabling, cable laying, and so on. It also includes a study on the necessary fiber proof test conditions to prevent fiber breakage during cable handling, that is, during cable laying and recovery and to assure long-term fiber reliability. Submarine optical fiber cable sea trial results are also stated for cables designed applying these studies.     

Design of a submarine optical-fiber cable using graded-index multimode fibers

This paper describes a designing method for a submarine optical-fiber cable unit consisting of graded-index multimode optical fiber. It has been assumed that excess losses inherent in cable manufacture are dominantly dependant on the lateral force yielded by wrapping tape. The excess losses have theoretically been derived and expressed by optical-fiber unit parameters. Through theoretical and experimental results, the suitable fiber-unit parameters have been given. Based on these investigations, two cable pieces have been fabricated. Excess losses of the cable, which are made with the suitable unit parameters, have been only 0.01 dB/km. This fact may prove the design suitability.     

光缆线路维护中的若干问题探讨

随着光纤通信的高速发展,光缆线路的可靠性和安全性越来越受到人们的关注,光缆线路的维护非常重要.文章对线路维护工程中的光缆线路障碍查找、光纤衰减均匀性、光纤接续和偏振模色散(PMD)等问题进行了分析.     

Optical Fiber Facilities for Subscriber Loops

This paper gives an overview of the introduction and subsequent development of optical fiber cable and its application to subscriber networks enabling economical broad-band services, such as video and high-speed digital data transmissions. This paper also outlines NTT's developments on subscriber optical fiber cable technology-in particular, the five-fiber ribbon cable structure, mass-fusion splicing machine, and multifiber connector-in its ongoing endeavors to establish economical and flexible subscriber optical fiber networks which provide optical fibers to each subscriber.     

城域管道光缆线路工程施工中需要注意的问题

章介绍了在城域光缆线路工程的光缆敷设、光纤接续和测试方面的一些经验技巧及需要注意的问题，如对地线房和接头两边预留、余留光缆的处理、接头余长光纤的盘放、测试波长的选择等都结构实际情况进行了讨论。     

现代海底光缆新特点

论述了海底光缆的一般要求、现代海底光缆的新特点和关键制造技术,并对我国海底光缆的发展提出了一点建议。     

中国光纤通信网的发展及市场

９０年代以来,中国电信事业发展迅速,成就卓然。文中阐述了光缆建设,光缆通信设备建设,光纤传输网体系及全光网发展的前景,并对光缆,光纤,ＳＤＨ设备及光连接器等市场进行了估测。     

大容量中心束管式光纤带光缆的设计与制造

随着通信行业向着数字化、宽带化、智能化方向的发展,光纤网络的建设将由骨干网转向局域网与城域网,由于连接的节点较多,往往需要铺设大芯数的光纤光缆。中心束管式光纤带光缆因其集成度高、占用路由资源少、成本低等特点,将会得到广泛应用。本文就大容量中心束管式光纤带光缆的设计与制造进行探讨。     

中国光纤光缆产业的发展趋势探讨

本文通过回顾我国光纤光缆产业的关键技术和产业构成,分析总结产业发展取得的成果和存在的不足,提出了我国光纤光缆产业下一步发展的五个方向的思考,供同行们参考。     

长途光缆线路的维护

随着光纤通信的快速发展，光缆线路的维护工作也显得越来越重要，因此从分析光缆线路故障的原因、预检维护、故障定位及抢修等方面入手，探讨了如何加强光缆线路维护工作的方法与途径。     

Design and performance of ultra-high-density optical fiber cable with rollable optical fiber ribbons

This paper proposes a novel ultra-high-density optical fiber cable that employs rollable optical fiber ribbons. The cable has great advantages in terms of cable weight and diameter, and fiber splicing workability. Moreover, it will be easy to install in a small space in underground ducts and on residential and business premises. The structural design of the rollable optical fiber ribbon is evaluated theoretically and experimentally, and an optimum adhesion pitch P in the longitudinal direction is obtained. In addition, we examined the performance of ultra-high-density cables with a small diameter that employ rollable optical fiber ribbons and bending-loss insensitive optical fibers. The transmission, mechanical and mid-span access performance of these cables was confirmed to be excellent.     

室内光缆的探讨

随着光纤光缆的大量使用,光缆进入建筑物内将不可避免,于是室内光缆应运而生并被迅速普及,成为光缆领域未来研究发展的热点,其市场前景非常广阔。室内光缆要求结构简单、价格便宜、易于分线和连接、阻燃等,因此有必要对室内光缆的诸多方面,包括结构、材料、标准和检测方法等进行研究。对室内光缆进行了简要的介绍,对室内光缆的各种典型结构及应用进行讨论,并对室内光缆的生产设备、标准和检测方法作了简单分析。     

光纤通信工程光纤光缆的验收

给出了光纤光缆产品的主要技术指标和测试方法,讨论了光纤光缆主要技术特性和光纤通信系统申通信容量、中继距离、接续损耗的关系,阐述了光纤光缆验收的基本原则和验收的一般方法。     

海底光缆传输系统简介

随着新技术和新设备的不断出现，为未来的海底光缆传输系统的发展提供了广阔的前景。本文根据ＣＣＩＴＴ建议Ｇ．９７１、Ｇ．９７２和Ｇ．９７４，介绍海底光缆传输系统的基本组成和特性，然后讨论光纤放大器的基本原理及其在海底光缆传输系统中的应用。