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内布拉斯加城中央电话公司最近敷设了第一条80多公里的光缆线路,使用户增加到6000多户。该线路采用了康宁公司生产的商标名为Corguide~R SMF单模光纤。通用电缆公司将这种光纤成缆:分四芯光缆和八芯光缆两种,其商标均为Gen GuideGP。据公司发言人说:“价格和质量好是选用康宁Corguide~B光纤的二个关键因素。各种价格迫使我们不但要分析铜缆系统的使用情况,还要分析光纤系统的使用情况。根据我们的一些计算表明,如果将提高光学器件性能的措施考虑进去的话,则它们之间的费用就没有多大区别”。这种单模光纤可减少原来所需的中继器数目,在1300nm波长平均衰减为0.4～0.5dB/km;同时也能提
Nebraska City Central Telephone Company recently laid the first more than 80 kilometers of fiber optic cable lines, allowing users to more than 6000 households. The line uses Corning ® R SMF single-mode fiber manufactured by Corning Incorporated. General Cable will be such a fiber optic cable: four-core cable and eight-core cable two, the trademark are Gen GuideGP. According to a company spokesman, “The price and quality are two key factors in choosing Corning’s Fiber B fiber, which has compelled us not only to analyze the use of copper systems but also to analyze the use of fiber optic systems.” Some calculations show that there is not much difference between the costs if the measures to improve the performance of optics are taken into account. " This single-mode fiber reduces the number of repeaters required and attenuates it by an average of 0.4 to 0.5 dB / km at a wavelength of 1300 nm;