公开(公告)号：US11352286B2

公开(公告)日：2022-06-07

申请号：US16555185

申请日：2019-08-29

申请人： Draka Comteq B.V.

发明人： Igor Milicevic ,  Gertjan Krabshuis ,  Mattheus Jacobus Nicolaas Van Stralen

IPC分类号： C03B37/012 ,  C03B37/018 ,  C03B37/029

摘要： The invention relates to exemplary methods, devices, and systems for heating an elongate silica cylinder to form a core-rod for optical fibers. An exemplary heating device includes an elongate cavity, an elongate liner bounding the cavity, a heating element in a heating element space surrounding the liner, the liner separating the heating element space from the cavity, and a gas flushing device for effecting a flow of gas at least through the heating element space. An exemplary method includes providing the elongate silica cylinder such that it extends through the cavity, heating the cylinder locally beyond its softening temperature, and effecting a flow of argon and nitrogen gas during the heating.

公开(公告)号：US11117825B2

公开(公告)日：2021-09-14

申请号：US14101705

申请日：2013-12-10

申请人： Draka Comteq B.V.

发明人： Igor Milicevic ,  Mattheus Jacobus Nicolaas Van Stralen ,  Johannes Antoon Hartsuiker

IPC分类号： C03B37/018

摘要： A method for activating an inner surface of a hollow glass substrate tube for manufacturing an optical fiber preform including depositing a plurality of activation glass layers on the inner surface of the hollow substrate tube by a PCVD process, wherein a total thickness of the deposited activation glass layers is between 10 microns and 250 microns, and etching the deposited activation glass layers to remove at least 30% of the deposited activation glass layers.

公开(公告)号：US10584055B2

公开(公告)日：2020-03-10

申请号：US15560247

申请日：2016-03-22

申请人： Draka Comteq B.V.

发明人： Igor Milicevic ,  Raoul Hens ,  Johannes Antoon Hartsuiker ,  Gertjan Krabshuis ,  Mattheus Jacobus Nicolaas van Stralen

IPC分类号： C03B37/018

摘要： A rotary feed-through for mounting a rotating substrate tube in a lathe and providing a flow of process gas into the tube, said feed-through including a process gas supply line for providing a process gas into said substrate tube, a rotatable holder arranged for receiving and holding said substrate tube for rotating said substrate tube with respect to said process gas supply line, a rotary union provided between said rotatable holder and said process gas supply line for rotatably connecting said rotatable holder to said process gas supply line, a stationary housing connected to said process gas supply line and to said rotatable holder, therewith forming a closed cavity surrounding said rotary union, wherein said stationary housing further includes an auxiliary gas supply line for providing said closed cavity with an auxiliary gas.

公开(公告)号：US10337955B2

公开(公告)日：2019-07-02

申请号：US15381661

申请日：2016-12-16

申请人： Draka Comteq B.V.

发明人： Franciscus Johannes Achten ,  Denis Molin ,  Pierre Sillard ,  Marianne Bigot-Astruc

IPC分类号： G01N21/00 ,  G02B6/42 ,  G01M11/00 ,  G02B6/028 ,  G02B6/036 ,  G01J9/00 ,  G02B6/14

摘要： The invention concerns a method for characterizing mode group properties of multimodal light traveling through an optical component, comprising: providing a Mode Group Separating optical fiber in an optical path between a light source and said optical component; launching reference pulses of light with a wavelength λt from said light source through said Mode Group Separating optical fiber into said optical component at discrete intervals between a core center and a core radius of said fiber. The Mode Group Separating optical fiber is a multimode fiber with an α-profile graded index core with an α-value chosen such that said fiber satisfies the following criterion at the wavelength λt:  Δτ  · L Δ ⁢ ⁢ T REF > 4 where: Δτ is a time delay difference between consecutive mode groups; L is a length of said fiber; ΔTREF is a Full Width at Quarter Maximum of said reference pulses.

公开(公告)号：US10007055B2

公开(公告)日：2018-06-26

申请号：US15023126

申请日：2013-09-20

申请人： DRAKA COMTEQ BV

发明人： Pierre Sillard ,  Denis Molin ,  Marianne Bigot-Astruc

IPC分类号： G02B6/028 ,  G02B6/036 ,  H04J14/00 ,  H04J14/04 ,  G02B6/02

CPC分类号： G02B6/0288 ,  G02B6/02023 ,  G02B6/02214 ,  G02B6/03627 ,  G02B6/0365 ,  H04J14/00 ,  H04J14/04

摘要： The invention relates to an optical link comprising N optical fibers, with N≥2. Each optical fiber comprises an optical core and an optical cladding surrounding the optical core, the optical core having a single αi graded-index profile with αi≥1, and the optical core having a radius R1i, where i E [1; N] is an index designating said optical fiber. Said optical cladding comprises a region of depressed refractive index ntrenchi, called a trench, surrounding the optical core. According to embodiments of the invention, for all optical fibers in said link, said optical core radius R1i and said length Li are chosen such that R1i≥13.5 μm and so as to satisfy a criterion C of quality. Thus, the invention provides a few-mode optical fiber link, which allow guiding an increased number of LP modes as compared to prior art FMF links, while reaching low Differential Mode Group Delay.

公开(公告)号：US09994480B2

公开(公告)日：2018-06-12

申请号：US15293715

申请日：2016-10-14

申请人： Draka Comteq B.V.

发明人： Igor Milicevic ,  Mattheus Jacobus Nicolaas Van Stralen ,  Gertjan Krabshuis ,  Johannes Antoon Hartsuiker

IPC分类号： C03C15/02 ,  C03B37/018

CPC分类号： C03C15/02 ,  C03B37/01228 ,  C03B37/018 ,  C03B37/01861

摘要： The present invention relates in a first aspect to a method for etching a primary preform or core rod. The present invention moreover relates in a second aspect to the etched primary preform thus obtained and moreover to a final preform and optical fibers obtained therefrom and to a method of preparing optical fibers therefrom.

公开(公告)号：US09871584B2

公开(公告)日：2018-01-16

申请号：US15028619

申请日：2013-10-15

申请人： Draka Comteq B.V.

发明人： Denis Molin ,  Pierre Sillard ,  Marianne Bigot-Astruc

IPC分类号： H04B10/00 ,  H04B10/079 ,  G01M11/00 ,  H04B10/073 ,  H04B10/2581

CPC分类号： H04B10/07951 ,  G01M11/332 ,  G01M11/338 ,  H04B10/0731 ,  H04B10/2581

摘要： The invention concerns a method of characterizing a multimode optical fiber link comprising a light source and a multimode fiber, which comprises: a step (170) of characterizing the multimode fiber using a measurement of the Dispersion Modal Delay (DMD) and delivering fiber characteristic data; a step (171) of characterizing the light source by at least three source characteristic curves showing three parameters of the source as a function of a fiber radius r and obtained by a technique similar to the DMD measurement; a step (173) of computing an Effective Bandwidth (EB) of the link, comprising calculating (172) a transfer function using both the fiber characteristic data and each of said source characteristic curves.

公开(公告)号：US09678270B2

公开(公告)日：2017-06-13

申请号：US15120832

申请日：2014-02-28

申请人： Draka Comteq B.V.

发明人： Marianne Bigot ,  Denis Molin ,  Pierre Sillard

IPC分类号： G02B6/028 ,  G02B6/036

CPC分类号： G02B6/0288 ,  G02B6/03627 ,  G02B6/0365

摘要： The invention concerns a multimode optical fiber, with a graded-index core co-doped with at least fluorine F and germanium GeO2 and a refractive index profile with at least two α-values. According to the invention, the concentration of fluorine F at the core center ([F]r=0) is between 0 and 3 wt % and the concentration of fluorine F at the core outer radius ([F]r=a) is between 0.5 wt % and 5.5 wt %, with [F]r=a−[F]r=>0.4 wt %. For wavelengths comprised between 850 nm and 1100 nm, said multimode optical fiber has an overfilled launch bandwidth (OFL-BW) greater than 3500 MHz·km and a calculated effective modal bandwidth (EMBc) greater than 4700 MHz·km over a continuous operating wavelength range greater than 150 nm.

公开(公告)号：US20170031089A1

公开(公告)日：2017-02-02

申请号：US15105767

申请日：2013-12-20

申请人： Draka Comteq B.V.

发明人： Louis-Anne de Montmorillon ,  Pierre Sillard

IPC分类号： G02B6/028 ,  G02B6/036

CPC分类号： G02B6/0281 ,  G02B6/03633 ,  G02B6/0365

摘要： The invention concerns a single mode optical fibre having a core and a cladding, the core refractive index profile having a trapezoid-like shape. According to an aspect of the invention, the transition part of the trapezoid-like core refractive index profile is obtained by gradually changing a concentration of at least two dopants from a concentration in said centre part of said core to a concentration in a cladding part adjacent to said core.

摘要翻译： 本发明涉及具有芯和包层的单模光纤，芯折射率分布具有梯形形状。 根据本发明的一个方面，梯形铁芯折射率分布的过渡部分是通过将至少两种掺杂剂的浓度从所述芯的所述中心部分的浓度逐渐改变为邻近的包层部分中的浓度而获得的 到核心

公开(公告)号：US09360647B2

公开(公告)日：2016-06-07

申请号：US12700293

申请日：2010-02-04

申请人： James Leonard Ryan ,  Denise Matthews ,  Brian G. Risch ,  Frank Edwards Davidson

发明人： James Leonard Ryan ,  Denise Matthews ,  Brian G. Risch ,  Frank Edwards Davidson

IPC分类号： G02B6/44

CPC分类号： G02B6/447

摘要： Disclosed is a novel central-tube cable with high-conductivity conductors. The novel central-tube cable according to the present invention yields a fiber optic cable with a smaller diameter than found in stranded-tube-cable designs.The central-tube cable features (i) a buffer tube containing optical conductors, (ii) radial strength members, and (iii) high-conductivity conductors coated with a dielectric material, such as polypropylene. The dielectric coating helps to prevent the high-conductivity conductors from shorting.

摘要翻译： 公开了一种具有高导电性导体的新型中心管电缆。 根据本发明的新颖的中心管电缆产生的光纤电缆的直径小于绞合管电缆设计中的直径。 中心管电缆的特征在于：（i）包含光导体的缓冲管，（ii）径向强度构件和（iii）涂覆有介电材料如聚丙烯的高导电性导体。 电介质涂层有助于防止高导电性导体短路。