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GYTA53 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。缆芯的中心是一根金属加强芯，对于某些芯数的光缆来说，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。涂塑铝带（APL）纵包后挤一层聚乙烯内护套，双面涂塑钢带（PSP）纵包后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 steel wire, sometimes sheathed with polyethylene (PE) for cable with high fiber count, locates in the center of core as a metallic strength member. Tubes (and fillers) are stranded around the strength member into a compact and circular cable core. An Aluminum Polyethylene Laminate (APL) is applied around the cable core. which is filled with the filling compound to protect it from water ingress. Then the cable core is covered with a thin PE inner sheath. After the PSP is longitudinally applied over the inner sheath, the cable is completed with a PE outer sheath.
具有很好的机械性能和温度特性
· Good mechanical and temperature performance
· 松套管材料本身具有良好的耐水性能和较高的强度
· High strength looes tube that is hydrolysis resistant
· 管内充以特种油膏，对光纤进行了关键性保护
· Special tube filling compound ensure a critical protection of fiber
· 良好的抗压性和柔软性
· Crush resistance and flexibility
· 采用下列措施来确保光缆的防水性能：
The following measures are taken to ensure the cable watertight:
- 单根钢丝中心加强芯
- Steel wire used as the central strength member
- 松套管内填充特种防水化合物
- Loose tube filling compound
- 完全缆芯填充
- 100% cable core filling
- 涂塑铝带（APL）防潮层
- APL moisture barrier
- 双面涂塑钢带（PSP）提高光缆的抗透潮能力
- PSP enhancing moisture-proof
- 良好的阻水材料防止光缆纵向渗水
- Water-blocking material
