公开(公告)号：US20030138226A1

公开(公告)日：2003-07-24

申请号：US10053627

申请日：2002-01-24

Applicant: ALCATEL

Inventor： Michael T. Rossi ,  Nicholas V. Nechitailo ,  Brian Risch

IPC: G02B006/44

CPC classification number: G02B6/4429

Abstract: An optical fiber cable including a buffer tube wherein the optical unit is maintained in an axial center location of the buffer tube and protected from contact with an inner wall of the buffer tube. At least first and second gel layers are interposed between the buffer tube and the optical unit, wherein the first gel layer surrounds the optical unit, the second gel layer surrounds the first gel layer, and the first and second gel layers have different rheological properties. The inner gel layer may have a yield stress and a viscosity which are lower than a yield stress and a viscosity of the outer gel layer. The lower yield stress and viscosity of the inner gel layer serves to maintain the optical unit in an axial center position within the buffer tube and facilitates easy re-positioning of the optical unit to the axial center position when the buffer tube is flexed or bent. As a result, the optical unit may be maintained in a low stress state and stress-induced attenuation may be prevented.

Abstract translation: 一种包括缓冲管的光纤电缆，其中所述光学单元保持在所述缓冲管的轴向中心位置并且防止与所述缓冲管的内壁接触。 至少第一和第二凝胶层介于缓冲管和光学单元之间，其中第一凝胶层围绕光学单元，第二凝胶层围绕第一凝胶层，第一和第二凝胶层具有不同的流变特性。 内部凝胶层可以具有低于屈服应力和外部凝胶层的粘度的屈服应力和粘度。 内凝胶层的较低的屈服应力和粘度用于将光学单元保持在缓冲管内的轴向中心位置，并且便于当缓冲管弯曲或弯曲时将光学单元容易地重新定位到轴向中心位置。 结果，光学单元可以保持在低应力状态，并且可以防止应力引起的衰减。

公开(公告)号：US20020168155A1

公开(公告)日：2002-11-14

申请号：US09851247

申请日：2001-05-09

Applicant: ALCATEL

Inventor： Michael T. Rossi ,  Nicholas V. Nechitailo ,  Brian Risch

IPC: G02B006/44

CPC classification number: G02B6/4494 ,  G02B6/4411 ,  G02B6/4429

Abstract: The present invention adds a gel-swellable layer in fiber optic cables to aid in protecting the fibers within the cable. The gel-swellable layer can be placed on the fibers, individual ribbons, stacks of ribbons and on the inner surface of tubes by various methods, such as co-extrusion, and can be cured by either heat curing or UV curing. The gel-swellable layers of this invention can be either smooth or textured. When the fibers are placed into the tubes and the tubes are filled with the water resistant gel, the gel-swellable layer absorbs some of the gel causing it to nullswellnull. As a result of the nullswellingnull a certain volume of gel is absorbed by the layer, thus reducing the capability of the gel to flow at elevated temperatures. Additionally, the swelled layers create a desirable stiffness transition from harder (less swelled) particles at the surface of the fiber to softer (more swelled) particles on the surface of the swelled layer. This variable-stiffness swelled layer then acts as a bumper and positioning structure between the fibers and the buffer tube or outer jacket, keeping the fibers in the center of the tube, and preventing the outer fibers from contacting the tube when the gel begins to break down at higher temperatures. Further, the swelling action results in the absorption of the lower-viscosity components of the gel, thereby reducing the likelihood of oil separation in the gel, which leads to gel breakdown. In addition, gel-swellable layers serve as lubricating layers allowing individual fibers in the fiber bundle and ribbons in the ribbon stacks to slide with respect to each other under applied thermo-mechanical loads thus reducing contact stress and associated fiber bending and buckling and attenuation problems.

Abstract translation: 本发明在光纤电缆中增加了凝胶溶胀层，以有助于保护电缆内的纤维。 可以通过各种方法（例如共挤出）将凝胶溶胀层放置在纤维，单个带，条带上和管的内表面上，并且可以通过热固化或UV固化来固化。 本发明的凝胶溶胀层可以是光滑的或有纹理的。 当纤维被放置在管中并且管填充有防水凝胶时，凝胶溶胀层吸收一些凝胶，使其“膨胀”。 由于“膨胀”，一定体积的凝胶被层吸收，从而降低凝胶在升高的温度下流动的能力。 此外，溶胀层产生从纤维表面上较硬（较少溶胀）的颗粒到膨胀层表面上较软（更溶胀）的颗粒所需的刚度转变。 该可变刚度溶胀层然后用作纤维和缓冲管或外护套之间的保险杠和定位结构，将纤维保持在管的中心，并且当凝胶开始破裂时防止外部纤维与管接触 在较高的温度下降。 此外，溶胀作用导致凝胶的较低粘度组分的吸收，从而降低凝胶中油分离的可能性，这导致凝胶破坏。 此外，凝胶膨胀层用作润滑层，允许纤维束中的单独纤维和带堆叠中的带在施加的热机械载荷下相对于彼此滑动，从而减少接触应力和相关的纤维弯曲和屈曲和衰减问题 。

公开(公告)号：US20040258372A1

公开(公告)日：2004-12-23

申请号：US10463338

申请日：2003-06-18

Applicant: ALCATEL

Inventor： Brian Risch ,  Olaf Storaasli

IPC: G02B006/44

CPC classification number: G02B6/443

Abstract: A fiber optic cable is provided with an outer jacket material having a coefficient of thermal expansion less than approximately 6E-5 in the range from 23null C. to null50null C. By utilizing an outer jacket material having a reduced coefficient of thermal expansion, the need for rigid strength members within the outer jacket is eliminated, thereby providing a fiber optic cable having a reduced size and weight.

Abstract translation: 光缆具有在23℃至-50℃范围内具有小于约6E-5的热膨胀系数的外护套材料。通过利用具有降低的热膨胀系数的外护套材料 消除了在外护套内对刚性强度构件的需要，从而提供了具有减小的尺寸和重量的光纤电缆。

公开(公告)号：US20030094767A1

公开(公告)日：2003-05-22

申请号：US10206195

申请日：2002-07-29

Applicant: ALCATEL

Inventor： Olaf Storaasli ,  Robert Jeyaseelan ,  Brian Risch

IPC: H02G015/013

CPC classification number: H02G3/0691

Abstract: A seal for sealing the space between a cable and the ends of the corrugated conduit. The seal includes a seal body including a base portion, an engagement portion attached to the base portion and being insertable in the space between the cable and the conduit, and a retainer disposed on the engagement portion for engaging at least one of the corrugations of the conduit. The base portion preferably has a groove for retaining an O-ring such that the O-ring tightly circumscribes the cable to create a seal. The retainer preferably includes helical threads disposed on the outside surface of the engagement portion. Alternatively, however, the retainer can include a rib which engages a corrugation or one or more protrusions which engages a corrugation. Further, the seal body is preferably split into two halves so that it can be installed onto the cable without requiring access to the end of the cable. In addition, the seal body may include two halves interconnected by a hinge so that it is one-piece. Further, as a substitute for the O-rings, the seal may include internal ribs made of a soft material which seal the cable.

Abstract translation: 用于密封电缆和波纹管道端部之间的空间的密封件。 所述密封件包括密封体，所述密封体包括基部，接合部分，其附接到所述基部并且可插入在所述电缆和所述导管之间的空间中;以及保持器，其设置在所述接合部分上，用于接合所述接合部分的至少一个波纹 导管。 基部优选地具有用于保持O形环的凹槽，使得O形环紧密地围绕电缆以形成密封。 保持器优选地包括设置在接合部分的外表面上的螺旋形螺纹。 但是，替代地，保持器可以包括接合波纹或与波纹接合的一个或多个突起的肋。 此外，密封体优选地分成两半，使得其可以安装到电缆上而不需要接近电缆的端部。 此外，密封体可以包括通过铰链互连的两个半部，使得它是一体的。 此外，作为O型圈的替代，密封件可以包括由密封电缆的软质材料制成的内部肋。

公开(公告)号：US20040109652A1

公开(公告)日：2004-06-10

申请号：US10309020

申请日：2002-12-04

Applicant: ALCATEL

Inventor： Brian Risch ,  Pierre Coat ,  Swati Neogi

IPC: G02B006/44

CPC classification number: B82Y30/00 ,  B01J20/205 ,  C01B3/0021 ,  G02B6/4492 ,  G02B6/4494 ,  Y02E60/325

Abstract: An optical fiber telecommunication cable including a sheath and at least one optical fiber is provided. The sheath encloses at least one optical fiber, and a hydrogen absorbing composition is disposed between the sheath and the at least one optical fiber. The hydrogen absorbing composition includes an oil, a thixotropic agent, an oxidant system and a carbon nanostructure component, wherein the carbon nanostructure component is hydrogen absorbent.

Abstract translation: 提供了包括护套和至少一个光纤的光纤通信电缆。 护套包围至少一根光纤，并且在护套和至少一根光纤之间设置吸氢组合物。 吸氢组合物包括油，触变剂，氧化剂体系和碳纳米结构组分，其中碳纳米结构组分是吸氢剂。

公开(公告)号：US20030108310A1

公开(公告)日：2003-06-12

申请号：US10012541

申请日：2001-12-12

Applicant: ALCATEL

Inventor： Nicholas V. Nechitailo ,  Brian Risch ,  Michael Rossi

IPC: G02B006/44

CPC classification number: G02B6/4494 ,  G02B6/4411

Abstract: A fiber optic buffer tube containing fiber optic ribbons centrally located within the buffer tube and a gel compound surrounding the fiber optic ribbons. Disposed within the gel compound, between the walls of the buffer tube and the fiber optic ribbons are water swellable yarns and/or particles. The water swellable yarns and/or particles volumetrically expand when in contact with water that has penetrated the buffer tube. The water swellable yarns/particles also provide greater surface area which helps to hold gel compound, at elevated temperature, within the tube and thus to prevent the fiber optic ribbons from coming into contact with the walls of the buffer tube, thereby preventing signal attenuation problems.

公开(公告)号：US20030123821A1

公开(公告)日：2003-07-03

申请号：US10028362

申请日：2001-12-28

Applicant: ALCATEL

Inventor： Brian Risch ,  George J. Dallas

IPC: G02B006/44

CPC classification number: C08G77/24 ,  C08J3/075 ,  G02B6/4494

Abstract: Fiber optic cable containing optical fibers and a silicone waterblocking gel for low temperature applications. The silicone waterblocking gel has an extremely low crystalline melting point and may be used in low temperature environments since it does not experiencing low temperature attenuation caused by crystallization of the base oil at temperatures below about null45null C. Examples of the waterblocking silicone gel are poly(alkyl)(aryl)siloxane and mono or polyhalogenatedsiloxane.

Abstract translation: 含有光纤的光缆和用于低温应用的硅胶防水凝胶。 硅氧烷防水凝胶具有极低的结晶熔点，并且可以在低温环境中使用，因为它不会在基础油在低于约-45℃的温度下结晶引起低温衰减。阻水硅胶的实例是 聚（烷基）（芳基）硅氧烷和单卤代或多卤代硅氧烷。

公开(公告)号：US20030099446A1

公开(公告)日：2003-05-29

申请号：US09985398

申请日：2001-11-02

Applicant: ALCATEL

Inventor： Geoff Witt ,  Brian Risch

IPC: G02B006/44

CPC classification number: G02B6/4495 ,  G02B6/443

Abstract: The present invention is directed to a novel construction of buffer tubes for fiber optic cables which offers a way to access the optical fibers inside a buffer tube while reducing the risk of damaging the fibers, as sometimes occurs when cutting the outer layer of the buffer tube. A buffer tube for use in a fiber optic cable of the present invention comprises a tube having a tube wall, the wall having an inside and outside surface, wherein an inner portion of tube wall, nearest the inside surface, is made of a material having a higher notch-sensitivity than an outer portion of the tube wall nearest the outside surface.

Abstract translation: 本发明涉及一种用于光纤电缆的缓冲管的新颖结构，其提供了一种在缓冲管内进入光纤的方法，同时降低了损坏纤维的风险，这在切割缓冲管的外层时有时会发生 。 用于本发明的光纤电缆的缓冲管包括管，其具有管壁，所述壁具有内表面和外表面，其中最靠近内表面的管壁的内部部分由具有 比最外侧表面的管壁的外部部分具有更高的切口灵敏度。