The structure of ELTFOC-GDYTA33 optical hybrid cable is that the single-mode or multi-mode optical fiber is sheathed in a loose tube made of high modulus polyester material, and the tube is filled with waterproof compound. The center of the cable is a metal reinforced core. The loose tube and the filling rope are twisted around the core to form a compact round core. The gap in the core is filled with water blocking filler. The power cord is built in, and then longitudinally wrapped with double-sided chrome coated plastic coated steel strip (PSP), and then covered with polyethylene inner sheath. The outer ring of the inner sheath is steel wire armored. Finally, the cable is formed with polyethylene outer sheath. GDYTA33光电混合缆的结构是将单模或多模光纤套入由高模量的聚酯材料做成的松套管中，套管内填充防水化合物。 缆的中心是一根金属加强芯,松套管和填充绳围绕中心加强芯绞合成紧凑的圆形缆芯，缆芯内的缝隙充以阻水填充物，内置电源线然后用双面镀铬涂塑钢带（PSP）纵包后覆以聚乙烯内护套，内护套外一圈钢丝铠装，***用聚乙烯外护套成缆。 Feature(产品特性)： 1.***控制光纤的余长***了光缆具有很好的抗拉性能和温度特性。 2.PBT松套管材料具有良好的耐水解性能，管内充以特种油膏，对光纤进行保护 3.采用采用涂塑钢带防潮层。 4.内置电源线方便布线安装. 5.光缆机械性能、环境性能符合YD/T 901-2009标准 1. The precise control of the surplus length of the optical fiber ensures that the optical fiber has good tensile properties and temperature characteristics. 2. The PBT loose tube material has good hydrolysis resistance, and the tube is filled with special grease to protect the optical fiber 3. Apply plastic coated steel strip damp proof layer. 4. the built-in power cord is convenient for wiring and installation 5. mechanical and environmental properties of optical cable shall meet yd/t 901-2009 standard Application(应用)： ★ Suitable for  underwarter or direct buried. 应用：水下综合布线或直埋。 Cable construction details(光缆结构详情) Number of Fiber 光纤芯数 4-144Core (4-144芯) Moisture Barrier 防潮 Water blocking system 阻水成分 Central strength member中心加强件 Material 材料 Steel wire 钢丝 Size尺寸 1.5mm Loose Tube 套管 Material材料 PBT Diamter直径 ф1.9-2.0mm Tube filling 套管内填充  Fiber Gel 纤膏 Armoring 带铠 Material材料 Corrugated steel tape 轧纹钢带 Steel wires 钢丝铠装 Inner and Outer Sheath 内外护套 Material 材料 PE Diamter 厚度 内护套：1.4±0.2mm ，外护套：1.7±0.2mm Wire Power Meter（电线功率表） 规格 导体直径 额定电压 RV 0.75mm² 300/500V 1.0mm² 300/500V 1.5mm² 300/500V 2.0mm² 300/500V 2.5mm² 300/500V Cable Mechanical Characteristic (光缆机械特性) 芯数 结构 外径 mm 重量 Kg/Km 拉伸力N 长期/短期 压扁力N 长期/短期 弯曲半径mm 静态/动态 2一30 1+5 12.8 268 4000/10000 3000/5000 12.5D/25D 32一36 1+6 13.2 287 4000/10000 3000/5000 12.5D/25D 38一60 1+5 13.9 318 4000/10000 3000/5000 12.5D/25D 62一72 1+6 14.2 334 4000/10000 3000/5000 12.5D/25D 74一84 1+7 15.1 363 4000/10000 3000/5000 12.5D/25D 86一96 1+8 15.8 387 4000/10000 3000/5000 12.5D/25D 96一108 1+9 16.6 437 4000/10000 3000/5000 12.5D/25D 110一120 1+10 17.2 465 4000/10000 3000/5000 12.5D/25D 122一132 1+11 18.3 558 4000/10000 3000/5000 12.5D/25D 134一144 1+12 18.9 583 4000/10000 3000/5000 12.5D/25D Fiber Color(光纤颜色) 1 2 3 4 5 6 Blue 蓝 Orange 橙 Green 绿 Brown 棕 Grey 灰 White 白 7 8 9 10 11 12 Red 红 Black 黑 Yellow 黄 Violet 紫 Pink 粉 Aqua 青绿 Fiber Characteristic (光纤特性) Fiber Style 光纤型号 Unit单位 SM G652D MM 50/125 MM 62.5/125 MM OM3-300 Condtion条件 nm 1310/1550 850/1300 850/1300 8500/1300 Attenuation衰减 dB/KM ≤ ≤ ≤3.0/1.0 ≤3.0/1.0 0.36/0.23 3.0/1.0 ..... .... Dispersion色散 1550nm Ps/(nm*km) ≤18 .... ..... .... 1625nm Ps/(nm*km) ≤22 .... ..... .... Bandwidth带宽 850nm MHZ.KM .... ≥400 ≥160 1300nm MHZ.KM .... ≥800 ≥500 Zero dispersion wavelength        零色散波长 nm ≥1302, ≤1322 .... ..... ≥1295, ≤1320 Zero dispresion slope  零色散率 nm ≤0.091 .... ..... .... PMD Maximum Individual Fiber 单根光纤值 ≤0.2 .... ..... ≤0.11 PMD Design Link Value                  光纤链路值 Ps(nm2*km) ≤0.08 .... ..... .... Fibre cutoff wavelength λc         光纤截止波长 nm ≥1180, ≤1330 .... ..... .... Cable cutoff wavelength λcc      光缆截止波长 nm ≤1260 .... ..... .... MFD 模场直径 1310nm um 9.2±0.4 .... ..... .... 1550nm um 10.4±0.8 .... ..... .... Numerical Aperture(NA)             数值孔径 .... .... 0.200±0.015 0.275±0.015 0.200±0.015 Step 台阶(双向平均值) dB  ≤0.05 ≤0.1 ≤0.1 ≤0.1 Irregularities over fiber length and point                              不均匀和衰减点不连续性 dB  ≤0.05 ≤0.1 ≤0.1 ≤0.1