公开(公告)号：US20030012526A1

公开(公告)日：2003-01-16

申请号：US10197184

申请日：2002-07-17

Applicant: Fitel USA Corp.

Inventor： Lars Riis ,  Tonny Sorensen ,  Torben E. Veng

IPC: G02B006/255

CPC classification number: G02B6/2551

Abstract: Techniques and systems are described for reducing splice loss in an optical fiber transmission line. One described technique includes splicing together at a splice point a first fiber having a first modefield diameter to a second fiber having a second modefield diameter larger than the first modefield diameter. The splice point is heated to a core expansion temperature to cause a controlled thermal diffusion of core dopant in the first fiber in order to reduce modefield mismatch between the first and second fibers. Splice loss is then reduced by heating the splice point to a differential diffusion temperature to cause a controlled diffusion of a cladding dopant in the first fiber, while maintaining the expanded core.

Abstract translation: 描述了用于减少光纤传输线中的接头损耗的技术和系统。 一种所描述的技术包括在拼接点处将具有第一模场直径的第一光纤拼接到具有大于第一模场直径的第二模场直径的第二光纤。 将接合点加热到芯膨胀温度，以引起芯掺杂剂在第一纤维中的受控热扩散，以减少第一和第二纤维之间的模场失配。 然后通过将接合点加热到差分扩散温度来降低接头损耗，从而在保持扩展的芯的同时引起第一纤维中的包层掺杂剂的受控扩散。

公开(公告)号：US20040114886A1

公开(公告)日：2004-06-17

申请号：US10317955

申请日：2002-12-12

Applicant: Fitel USA Corp.

Inventor： Erling D. Christensen ,  Thomas Rafn ,  Lars Riis ,  Torben E. Veng

IPC: G02B006/255

CPC classification number: G02B6/2552

Abstract: Systems and methods are described for reducing optical fiber splice loss. A torch is described for performing a thermally-diffused expanded core (TEC) technique. The torch includes a hollow body. A conduit delivers a flammable gas to the hollow body. The flammable gas streams out of an array of orifices formed in the hollow body. The orifices are shaped and arranged in the array such that when the streaming gas is ignited, a substantially continuous elongated flame is created having a desired heating profile. Further described are a thermal treatment station incorporating a line torch and techniques for using an elongated flame to reduce optical fiber splice loss.

Abstract translation: 描述了减少光纤接头损耗的系统和方法。 描述了一种用于执行热扩散扩展芯（TEC）技术的手电筒。 火炬包括一个中空的身体。 导管向中空体输送可燃气体。 可燃气体从形成在中空体中的孔阵列流出。 孔被成形并排列在阵列中，使得当流动气体被点燃时，产生具有所需加热曲线的基本连续的细长火焰。 进一步描述了包括线炬的热处理站和使用细长火焰以减少光纤接头损耗的技术。