公开(公告)号：US20040005128A1

公开(公告)日：2004-01-08

申请号：US10190134

申请日：2002-07-03

Applicant: Fitel USA Corp.

Inventor： David John DiGiovanni ,  Andrew D. Yablon ,  Man Fei Yan

IPC: G02B006/16

CPC classification number: G02B6/02123 ,  C03B37/027 ,  C03B37/15 ,  C03B2201/02 ,  C03B2201/12 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2203/22 ,  C03B2203/222 ,  C03B2205/40 ,  G02B6/02 ,  G02B6/02071 ,  G02B6/2551 ,  G02B6/2552

Abstract: Systems and methods are described for fabricating a varying-waveguide optical fiber. In one described method, a preform is fabricated having a core and at least one cladding region. The cladding region has a higher viscosity and the core region has a lower viscosity. The relative viscosities of the cladding region and core are chosen such that, when tension is applied to an optical fiber drawn from the preform, the applied tension is primarily borne by the cladding region thereby causing a viscoelastic strain to be frozen into the cladding region, while creating a minimal viscoelastic strain in the core. The method further includes drawing the preform into an optical fiber under an applied tension, such that a viscoelastic strain is frozen into the cladding region the frozen-in viscoelastic strain decreasing the cladding region refractive index. The cladding region refractive index is changed in a section of the optical fiber by heating the section so as to relax the viscoclastic strain frozen into the cladding region in the section of fiber, thereby increasing the cladding region refractive index in the section of fiber.

Abstract translation: 描述了制造变波导光纤的系统和方法。 在一种所描述的方法中，制造具有芯和至少一个包层区的预成型件。 包层区域具有较高的粘度，并且核心区域具有较低的粘度。 选择包层区域和芯体的相对粘度，使得当对从预成型体拉出的光纤施加张力时，施加的张力主要由包层区域承担，从而使粘弹性应变冻结在包层区域中， 同时在核心中产生最小的粘弹性应变。 该方法还包括在施加的张力下将预型件拉伸成光纤，使得粘弹性应变被冻结到包层区域中，使冷冻的粘弹性应变降低包层区折射率。 通过加热该部分使包层区折射率变化，使得在纤维截面中冻结到包层区域的粘弹性应变松弛，从而增加纤维截面中的包层区折射率。

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：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：US20040005126A1

公开(公告)日：2004-01-08

申请号：US10190137

申请日：2002-07-03

Applicant: Fitel USA Corp.

Inventor： Andrew D. Yablon

IPC: G02B006/255

CPC classification number: G02B6/2551

Abstract: Systems and methods are described for reducing splice loss in an optical transmission line. A described system includes fiber guides for holding a first fiber and a second fiber in position for splicing to each other at a splice point. A heat source applies sufficient heat at the splice point to cause the first and second fibers to be fused together at the splice point, and subsequently applied heat to the splice point after the splice has been completed. The system further includes a tensioning assembly for applying a controlled, non-zero tension to the first and second fibers after they have been spliced together.