摘要
采用常规G.652光纤的光纤复合架空地线（Optical Fiber Composite Overhead Ground Wire,OPGW）因受光纤弯曲性能的制约,光纤应变域约为光缆额定拉断力的60%左右,但在高覆冰、大跨越等极端条件下工作时光纤应变域会超过光缆额定拉断力的80%。为使光缆结构不变而增大光纤应变域,文章首次在外径为2.5 mm的松套钢管内置入24芯G.657.B3抗弯光纤,OPGW外径为12.6 mm。结果表明,该方案可使光纤应变域达到光缆额定拉断力的100%,1 550 nm处的光纤衰减不超过0.20 d B/km,在-40~65℃温度循环的附加衰减不超过±0.024 d B/km。经光纤熔接试验验证,G.657.B3光纤本身和与G.652D光纤的接续损耗可以满足工程要求。
OPGW with regular G.652 fibers, due to the fiber bending performance, the fiber stress-strain can reach about 60% RTS. However, for the extreme conditions of high ice loading and big span, the fiber stressstrain will exceed 80%. In order to increase the fiber stress-strain without cable construction modification, this paper presents a fi rst successful development that 24 G.657.B3 bending-loss insensitive fi bers are implanted in an outer diameter 2.5 mm loose steel tube. The OPGW outer diameter is 12.6 mm. The test after cabling shows the fi ber stress-strain can reach 100% with fi ber attenuation ≤ 0.20 d B/km at 1550 nm.Temperature cycling additional fi ber attenuation（–40~65℃）≤±0.024 d B/km. The fi ber splicing test shows the splicing loss between G.657.B3 and G.652 D fi bers can meet the engineering requirements.
出处
《电力信息与通信技术》
2016年第2期81-86,共6页
Electric Power Information and Communication Technology
