gyfty53 光缆的结构是将 250μm 光纤套入高模量材料制成的松套管中，松套管内填充防水化合物。单模光纤缆芯的中心是一根非金属加强芯（frp），对于某些芯数的光缆来说， 非金属加强芯外还需要挤上一层聚乙烯（pe）。松套管（和填充绳）围绕中心加强芯绞合成紧凑和圆形的缆芯，缆芯内的缝隙充以阻水填充物。缆芯外挤上一层聚乙烯内护套，双面涂塑钢带（psp）纵包后，光缆生产厂家挤制聚乙烯护套成缆。
the fibers, 250μm, are positioned in a loose tube made of a high modulus plastic. the tubes are filled with a water-resistant filling compound. a fiber reinforced plastic (frp) locates in the center of core as a non-光缆生产厂家metallic strength member. the tubes (and fillers) are stranded around the strength member into a compact and circular core. then the cable core is covered with a thin polyethylene (pe) inner sheath, which is filled with jelly to protect it from water ingress. a layer of water-blocking material is applied around the cable core to prevent water ingress all the same. after a corrugated steel tape armor is applied. the cable is completed with a pe outer sheath.