公开(公告)号：US20190011633A1

公开(公告)日：2019-01-10

申请号：US15779962

申请日：2015-12-17

Applicant: Draka Comteq B.V.

Inventor： Denis Molin ,  Koen De Jongh ,  Marianne Bigot ,  Pierre Sillard

IPC: G02B6/028 ,  G01M11/00 ,  H04B10/2581

CPC classification number: G02B6/0288 ,  G01M11/335 ,  G01M11/338 ,  H04B10/0775 ,  H04B10/2581

Abstract: A method of qualifying an effective bandwidth of a multimode optical fiber at a first wavelength λ1, using DMD data of the fiber measured a second wavelength λ2. Data representative of a Radial Offset Delay, a Radial Offset Bandwidth and a Relative Radial Coupled Power of the fiber are derived from the DMD data at the second wavelength λ2. A transformation is performed on the ROD data and ROB data at the second wavelength λ2 to obtain corresponding ROD data and ROB data at the first wavelength λ1. An effective bandwidth of the fiber at the second wavelength λ2 is computed using the ROD data and the ROB data at the first wavelength λ1 and the {tilde over (P)}DMD data at the second wavelength λ2.

公开(公告)号：US20170331549A1

公开(公告)日：2017-11-16

申请号：US15531999

申请日：2014-12-01

Applicant: DRAKA COMTEQ B.V.

Inventor： Denis Molin ,  Pierre Sillard ,  Marianne Bigot

IPC: H04B10/079 ,  H04B10/073 ,  H04B10/2581 ,  H04B10/69

CPC classification number: H04B10/07951 ,  G01M11/333 ,  G01M11/338 ,  H04B10/0731 ,  H04B10/0795 ,  H04B10/2581 ,  H04B10/69

Abstract: Disclosed is a method of characterizing a multimode optical fiber link including a light source and two or more multimode fibers. The method includes a step of characterizing each of said multimode fibers using a measurement of the Dispersion Modal Delay (DMD) for each of said multimode fibers, and delivering, for each of said multimode fibers, at least three fiber characteristic curves as a function of a radial offset value r; a step of characterizing the light source by at least three source characteristic curves showing at least three parameters of the source as a function of a fiber radius r and obtained by a technique similar to the DMD measurement; and a step of computing an Effective Bandwidth (EB) of the link, comprising calculating a transfer function using both each of said source characteristic curves and each of said at least three fiber characteristic curves for each of said multimode fibers.

公开(公告)号：US20170248755A1

公开(公告)日：2017-08-31

申请号：US15510296

申请日：2014-09-12

Applicant: Draka Comteq B.V.

Inventor： Marianne Bigot ,  Denis Molin ,  Pierre Sillard

IPC: G02B6/028

CPC classification number: G02B6/0288 ,  G02B6/0281 ,  G02B6/03627

Abstract: The invention concerns a multimode optical fiber, with an ct-profile graded-index core with an a-value between 1.96 and 2.05 and a N value defined as N=(R1/λ)2(n12−n02) between 7 and 52, where R1 is the multimode core radius, n1 is the maximum index of the multimode core and n0 is the minimum index at the outer edge of the graded index core. According to the invention, a depressed region directly surrounds the graded/index core and satisfies the criteria: −2.20

公开(公告)号：US20170097282A1

公开(公告)日：2017-04-06

申请号：US15381661

申请日：2016-12-16

Applicant: Draka Comteq B.V.

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

IPC: G01M11/00 ,  G02B6/14 ,  G01J9/00 ,  G02B6/028

CPC classification number: G01M11/338 ,  G01J9/00 ,  G01J2009/004 ,  G01J2009/006 ,  G02B6/0288 ,  G02B6/0365 ,  G02B6/14

Abstract: 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：US10337955B2

公开(公告)日：2019-07-02

申请号：US15381661

申请日：2016-12-16

Applicant: Draka Comteq B.V.

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

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

Abstract: 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：US09871584B2

公开(公告)日：2018-01-16

申请号：US15028619

申请日：2013-10-15

Applicant: Draka Comteq B.V.

Inventor： Denis Molin ,  Pierre Sillard ,  Marianne Bigot-Astruc

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

CPC classification number: H04B10/07951 ,  G01M11/332 ,  G01M11/338 ,  H04B10/0731 ,  H04B10/2581

Abstract: 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：US20170205311A1

公开(公告)日：2017-07-20

申请号：US15408746

申请日：2017-01-18

Applicant: Draka Comteq B.V.

Inventor： Franciscus Johannes Achten ,  Denis Molin ,  Nam Nguyen Thang

IPC: G01M11/00 ,  G01M11/08

CPC classification number: G01M11/338 ,  G01M11/088 ,  G01M11/332 ,  G01M11/335 ,  H04B10/0775

Abstract: The invention relates to a method of measuring time delays with respect to differential mode delay of a multi-mode fiber or a few-mode fiber for at least two different wavelengths. The time delays for each wavelength are measured before the single mode fiber is translated to a next radial offset.

公开(公告)号：US09678270B2

公开(公告)日：2017-06-13

申请号：US15120832

申请日：2014-02-28

Applicant: Draka Comteq B.V.

Inventor： Marianne Bigot ,  Denis Molin ,  Pierre Sillard

IPC: G02B6/028 ,  G02B6/036

CPC classification number: G02B6/0288 ,  G02B6/03627 ,  G02B6/0365

Abstract: 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：US20170131465A1

公开(公告)日：2017-05-11

申请号：US15413517

申请日：2017-01-24

Applicant: Draka Comteq B.V.

Inventor： Denis Molin ,  Pierre Sansonetti ,  Pierre Sillard

IPC: G02B6/028

CPC classification number: G02B6/0288 ,  G02B6/02042 ,  G02B6/0281 ,  G02B6/03633

Abstract: A hybrid optical fiber integrates features of multimode optical fibers and single-mode optical fibers. The hybrid optical fiber possesses an optical core having a first core region and a second core region to provide improved optical mode coupling ratio for single-mode transmission while maintaining a broad bandwidth for multimode transmission. The hybrid optical fiber's optical core may optionally include a depressed trench positioned between the optical core's first core region and the optical core's second core region to reduce modal dispersion and to improve modal bandwidth during multimode transmissions.

公开(公告)号：US20130028564A1

公开(公告)日：2013-01-31

申请号：US13627351

申请日：2012-09-26

Applicant: Draka Comteq B.V.

Inventor： Denis Molin ,  Pierre Sillard ,  Marianne Bigot-Astruc

IPC: G02B6/028

CPC classification number: G02B6/0288 ,  G02B6/03627 ,  G02B6/0365

Abstract: A trench-assisted, multimode optical fiber includes a central core having an alpha refractive index profile with respect to an outer cladding. The optical fiber also includes an inner cladding, a depressed trench, and an outer cladding. The optical fiber achieves reduced bending losses and a high bandwidth.

Abstract translation: 沟槽辅助多模光纤包括相对于外包层具有α折射率分布的中心纤芯。 光纤还包括内包层，凹陷沟槽和外包层。 光纤实现了减少的弯曲损耗和高带宽。