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介绍了光缆的光纤密度和填充密度概念,分析了光缆中光纤松套管内光纤芯数与管内径、光纤外径、光纤允许弯曲半径和光纤余长的关系,根据计算结果,首次在外径为2.5 mm的松套钢管内植入48根直径为200μm的G.657 A2细径光纤,制成的OPGW外径为12.6 mm,成缆后所有光纤在1 550 nm光波长的衰减均小于0.19 d B/km,应力应变和温度循环、与G.652D光纤接续等主要性能均符合相关要求。验证了G.657A2光纤可以与G.652光纤兼容和细径G.657A2在高填充密度光纤OPGW中的应用前景。
The concept of fiber density and packing density of optical fiber cable is introduced. The relationship between the number of fiber cores in fiber loose tube and the inner diameter of fiber, the outer diameter of fiber, the allowable bending radius of fiber and the fiber length is analyzed. Based on the calculation results, mm diameter of 48 sets of loose tube embedded G.657 A2 200μm diameter fiber diameter of OPGW made of 12.6 mm outer diameter of all fibers after cable optical loss at 1 550 nm attenuation of less than 0.19 d B / km, stress strain and temperature cycling, and G.652D optical fiber and other key performance are in line with the relevant requirements. It verifies that G.657A2 fiber can be compatible with G.652 fiber and the application prospect of G.657A2 in OPGW with high packing density.