摘要:
An optical and power composite cable includes a plurality of power lines adjacently arranged in a cable, each power line having a central conductor and an insulating coating layer surrounding the central conductor; at least one optical fiber unit arranged together with the power lines, each optical fiber unit having at least one optical fiber and a tube surrounding the optical fiber; and a cable sheath surrounding the power lines and the optical fiber unit, wherein, assuming that the thickness of the tube is t and that the outer diameter of the tube is D, the ratio of the thickness of the tube to the outer diameter defined as t/D is 8% to 20%.
摘要翻译:光功率复合电缆包括相邻布置在电缆中的多个电源线,每个电源线具有中心导体和围绕中心导体的绝缘涂层; 至少一个光纤单元与电源线一起布置,每个光纤单元具有至少一个光纤和围绕光纤的管; 以及围绕电力线和光纤单元的电缆护套,其中,假设管的厚度为t,管的外径为D,管的厚度与外径的比率定义为 t / D为8%〜20%。
摘要:
An optical and power composite cable includes a plurality of power lines adjacently arranged in a cable, each power line having a central conductor and an insulating coating layer surrounding the central conductor; at least one optical fiber unit arranged together with the power lines, each optical fiber unit having at least one optical fiber and a tube surrounding the optical fiber; and a cable sheath surrounding the power lines and the optical fiber unit, wherein, assuming that the thickness of the tube is t and that the outer diameter of the tube is D, the ratio of the thickness of the tube to the outer diameter defined as t/D is 8% to 20%.
摘要翻译:光功率复合电缆包括相邻布置在电缆中的多个电源线,每个电源线具有中心导体和围绕中心导体的绝缘涂层; 至少一个光纤单元与电源线一起布置,每个光纤单元具有至少一个光纤和围绕光纤的管; 以及围绕电力线和光纤单元的电缆护套,其中,假设管的厚度为t,管的外径为D,管的厚度与外径的比率定义为 t / D为8%〜20%。
摘要:
Disclosed is a heating element having a ring shape provided in a furnace for drawing an optical fiber from a large-diameter preform so as to heat and melt a preform. The heating element according to heating element includes at least two hot zones having different heating temperatures, wherein one of the hot zones is arranged in a neck-down region of the preform to heat the preform at a temperature suitable for drawing an optical fiber. Also, the hot zone includes a first heating unit for heating a preform at a temperature suitable for draw an optical fiber from the preform; and a second heating unit for heating a surface of the preform to a relatively lower temperature than the first heating unit.
摘要:
The present invention relates to a method for manufacturing an optical fiber preform using an MCVD process comprising (A) forming a predetermined thickness of a cladding layer in a preform tube by repeating a unit process of heating an outer peripheral surface of the preform tube at 1,700 to 2,5000 C using a heat source moving in a process direction, and simultaneously injecting cladding layer forming gas and chlorine (Cl) gas into the preform tube; and (B) forming a predetermined thickness of a core layer in the preform tube by repeating a unit process of heating the outer peripheral surface of the preform tube at 1,700 to 2,5000 C using the heat source moving in a process direction, and simultaneously injecting core layer forming gas and chlorine (Cl) gas into the preform tube having the cladding layer.