GYTA地埋光缆，双铠双护套地埋光缆

发布日期：2016-09-23 08:52浏览次数：110

产品描述 Description

GYTA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 is completed with a PE sheath.

产品特点 Characteristics

光缆结构图Cable Structure

1.具有很好的机械性能和温度特性
Good mechanical and temperature performance

2.松套管材料本身具有良好的耐水解性能和较高的强度
High strength loose tube that is hydrolysis resistant

3.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

4.特别设计的紧密的光缆结构，有效防止套管回缩
Specially designed compact structure is good at preventing loose tubes from shrinking

5.PE护套具有很好的抗紫外辐射性能
PE sheath protects cable from ultraviolet radiation

6.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

产品标准Standards

七号桥公司GYTA光缆符合YD/T 901和IEC 60794-1标准
QiHaoQiao GYTA cable complies with Standard YD/T 901 as well as IEC 60794-1.

（GYTA）适用：管道、架空Application: Duct / Aerial

光学特性Optical Characteristics

光纤类型 Fiber Typefdf		G.652	G.655	50/125 µm	62.5/125 µm
衰减 Attenuation（+20℃）	@ 850 nm			≤ 3.3 dB/km	≤ 3.5 dB/km
	@1300 nm			≤ 1.2 dB/km	≤ 1.2 dB/km
	@1300 nm	≤ 0.36 dB/km	≤ 0.40 dB/km
	@1550 nm	≤ 0.22 dB/km	≤ 0.23 dB/km
带宽 Bandwidth	@ 850 nm			≥ 500 MHz•km	≥ 200 MHz•km
带宽 Bandwidth	@1300 nm			≥ 500 MHz•km	≥ 500 MHz•km
数值孔径 Numerical Aperture				0.200 ± 0.015 NA	0.275 ± 0.015 NA
光缆截止波长Cable Cut-off Wavelength lcc		≤ 1260 nm	≤ 1450 nm