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1偏心现象PA12(聚十二内酰胺,尼龙12)紧包铠装光缆采用PA12紧包G.657A1光纤,使光缆具有抗压、抗弯曲、耐热、耐寒、耐磨、耐油等特点;同时,采用钢丝螺旋铠装不仅可避免G.657A1光纤受外界应力作用,而且使光缆具有防蚁防鼠、弯曲半径小、便于室内外施工与作业等特点。但是,在PA12紧包铠装光缆生产过程中,PA12紧包二次涂覆G.657A1光纤时常发生偏心问题。偏心不仅造成了光缆结构的不对称,而且严重时会导致光纤衰减系数偏大,劣
1 Eccentric phenomenon PA12 (poly laurolactam, nylon 12) tight armored cable using PA12 tightly wrapped G.657A1 fiber, so that the cable has a compression, bending, heat, cold, wear, oil and other characteristics; the same time The use of wire spiral armor can not only avoid G.657A1 optical fiber by the role of external stress, but also make the cable have ants anti-rat, small bending radius, easy for indoor and outdoor construction and operation characteristics. However, in the PA12 tight-armored fiber optic cable production process, PA12 tight secondary coating G.657A1 fiber eccentric problems often occur. Eccentricity not only caused the fiber optic cable structure asymmetry, and serious will lead to fiber attenuation coefficient is too large, poor