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：US20040091219A1

公开(公告)日：2004-05-13

申请号：US10293824

申请日：2002-11-12

Applicant: Fitel USA Corp.

Inventor： Erling D. Christensen ,  Torben E. Veng ,  Andrew D. Yablon

IPC: G02B006/255

CPC classification number: G02B6/2551 ,  G02B6/262

Abstract: Techniques are described for reducing splice loss between a pair of optical fibers. A first fiber is spliced to a second fiber at a splice point. A region of the spliced fibers, including the splice point, is thermally treated to cause a controlled diffusion of dopants in the region. A controlled tension is then applied to the splice region while heating it to a predetermined temperature to produce a controlled change in the splice region's strain state. Further described is a heat and tension station for performing a heat and tension technique on a pair of spliced fibers.

Abstract translation: 描述了用于减少一对光纤之间的接头损耗的技术。 第一光纤在接合点处被接合到第二光纤。 包括拼接点的接合纤维的区域被热处理以引起该区域中掺杂剂的受控扩散。 然后将受控张力加热到接合区域，同时将其加热到预定温度，以产生接合区域的应变状态的受控变化。 进一步描述了一种用于在一对拼接的纤维上进行热和张力技术的热和张力站。

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。

公开(公告)号：US20040086243A1

公开(公告)日：2004-05-06

申请号：US10287307

申请日：2002-11-04

Applicant: Fitel USA Corp.

Inventor： David John DiGiovanni ,  Peter Mikal Holmblad ,  Torben E. Veng ,  Andrew D. Yablon

IPC: G02B006/02 ,  G02B006/16

CPC classification number: G02B6/03644 ,  C03B37/01413 ,  C03B37/01807 ,  C03B37/027 ,  C03B2201/10 ,  C03B2201/28 ,  C03B2203/22 ,  C03B2203/222 ,  C03B2203/36 ,  C03B2205/40 ,  G02B6/03666 ,  G02B6/03694 ,  G02B6/2551

Abstract: Optical fibers are described that exhibit reduced splice loss. Further described are techniques for fabricating optical fibers exhibiting reduced splice loss. One described fiber includes a plurality of regions, one region having a higher viscosity and the other region having a lower viscosity, such that when the fiber is drawn under tension, a strain is frozen into the higher viscosity region. A lower viscosity buffer layer is sandwiched between the higher viscosity region and the lower viscosity region. The buffer layer isolates the lower viscosity region from changes in refractive index in the higher viscosity region arising from a change in the strain frozen into the higher viscosity region.

Abstract translation: 描述了表现出减少的接合损耗的光纤。 进一步描述的是制造具有减小的接合损耗的光纤的技术。 一种所述的纤维包括多个区域，一个区域具有较高的粘度，另一个区域具有较低的粘度，使得当纤维在张力下拉伸时，应变被冻结到较高粘度的区域中。 较低粘度的缓冲层夹在较高粘度区域和较低粘度区域之间。 缓冲层将较低粘度区域与由较冷粘度变为较高粘度区域的应变的变化引起的较高粘度区域的折射率变化相分离。

公开(公告)号：US20040013374A1

公开(公告)日：2004-01-22

申请号：US10197192

申请日：2002-07-17

Applicant: Fitel USA Corp.

Inventor： David John DiGiovanni ,  Torben E. Veng

IPC: G02B006/255

CPC classification number: G02B6/2551 ,  C03B23/043 ,  C03B37/15 ,  F23D14/40

Abstract: Systems and techniques are described for fabricating a low-loss, high-strength optical transmission line. In one described technique, a first fiber is spliced to a second fiber at a splice point. The spliced fibers are loaded into a heat treatment station, where a gas torch flame is used to thermally treat a splice region including the splice point, with the thermal treatment reducing splice loss between the first and second fibers. While heating the splice region, a dry gas is purged around the torch flame during the heat treatment process to avoid water at the surface of the spliced fibers. According to further described techniques, a purging gas is fed to the torch flame to purge dust particles from the flame, and after the heat treatment has been completed, the torch flame is used to restore the glass surface of the spliced fibers. Additionally described are torch assemblies for fabricating low-loss, high-strength optical fiber transmission lines.

Abstract translation: 描述了用于制造低损耗高强度光传输线的系统和技术。 在一种所描述的技术中，第一光纤在拼接点处被接合到第二光纤。 接合的纤维被装载到热处理站中，其中使用气体焰炬火焰来热处理包括接合点的接合区域，热处理减少了第一和第二纤维之间的接合损耗。 在加热接合区域的同时，在热处理过程中，在割炬火焰周围清除干燥气体，以避免接合纤维表面的水分。 根据进一步描述的技术，将吹扫气体供给到火炬火焰以从火焰中吹扫灰尘颗粒，并且在热处理完成之后，使用割炬火焰来还原拼接纤维的玻璃表面。 另外描述了用于制造低损耗，高强度光纤传输线的火炬组件。