Patents by Inventor Marianne Bigot-Astruc

Marianne Bigot-Astruc has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10337955
    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 ?t 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 ?-profile graded index core with an ?-value chosen such that said fiber satisfies the following criterion at the wavelength ?t: ? ?? ? · L ? ? ? T REF > 4 where: ?? is a time delay difference between consecutive mode groups; L is a length of said fiber; ?TREF is a Full Width at Quarter Maximum of said reference pulses.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: July 2, 2019
    Assignee: Draka Comteq B.V.
    Inventors: Franciscus Johannes Achten, Denis Molin, Pierre Sillard, Marianne Bigot-Astruc
  • Patent number: 10007055
    Abstract: 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 ?i graded-index profile with ?i?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 ?m 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.
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: June 26, 2018
    Assignee: Draka Comteq B.V.
    Inventors: Pierre Sillard, Denis Molin, Marianne Bigot-Astruc
  • Patent number: 9871584
    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.
    Type: Grant
    Filed: October 15, 2013
    Date of Patent: January 16, 2018
    Assignee: Draka Comteq, B.V.
    Inventors: Denis Molin, Pierre Sillard, Marianne Bigot-Astruc
  • Patent number: 9671553
    Abstract: A multimode optical fiber includes a central core surrounded by an outer cladding. The central core has a graded-index profile with respect to the outer cladding and an outer radius r1 of between about 30 microns and 50 microns (e.g., between about 35 microns and 45 microns). The optical fiber also includes an inner cladding positioned between the central core and the outer cladding, and a depressed trench positioned between the inner cladding and the outer cladding. The multimode optical fiber exhibits reduced bending losses.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: June 6, 2017
    Assignee: Draka Comteq, B.V.
    Inventors: Denis Molin, Pierre Sillard, Marianne Bigot-Astruc, Frans Gooijer, Franciscus Johannes Achten
  • Patent number: 9638856
    Abstract: The invention relates to an optical fiber comprising an optical core and an optical cladding surrounding the optical core, the optical core having a single ? graded-index profile with ??1, and the optical core having a radius R1 and a maximal refractive index n0, said optical cladding having a refractive index nCl. Said optical cladding comprises a region of depressed refractive index ntrench, having an inner radius R2, with R2?R1, and an outer radius R3, with R3>R2. According to embodiments of the invention, the ?-value of said graded index profile and the optical core radius R1 are chosen such that R1?13.5 ?m and so as to satisfy a criterion C of quality. Thus, the invention provides a few-mode optical fiber, which allow guiding an increased number of LP modes as compared to prior art FMFs, while reaching the lowest Differential Mode Group Delay. The system reach is thus increased over prior art.
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: May 2, 2017
    Assignee: DRAKA COMTEQ BV
    Inventors: Pierre Sillard, Denis Molin, Marianne Bigot-Astruc
  • Patent number: 9625646
    Abstract: A multimode optical fiber is provides, which includes an optical core and an optical cladding surrounding the optical core. The optical core has a refractive graded-index profile. The optical cladding includes: an inner layer surrounding the optical core, an intermediate layer, called a “depressed trench”, surrounding the inner layer, and an outer layer surrounding the depressed trench and having a constant refractive index. The depressed trench has a width W and a negative refractive index difference ?nt with respect to the outer layer, and is designed so as to satisfy the following inequality: |0.585677?114.681×S+13.7287×S2+18.7343×S×W?4.61112×S×?nt.103?0.913789×W×?nt.103|+2×W×?nt.103<?30 wherein: S is the width of the inner cladding, which is included between 0.6 ?m and 1.6 ?m; ?nt is included between ?11.10?3 and ?4.10?3; and W×?nt.103 is lower than ?25 ?m.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: April 18, 2017
    Assignee: DRAKA COMTEQ BV
    Inventors: Denis Molin, Marianne Bigot-Astruc, Pierre Sillard, Franciscus Johannes Achten
  • Publication number: 20170097282
    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 ?t 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 ?-profile graded index core with an ?-value chosen such that said fiber satisfies the following criterion at the wavelength ?t: ? ?? ? · L ? ? ? T REF > 4 where: ?? is a time delay difference between consecutive mode groups; L is a length of said fiber; ?TREF is a Full Width at Quarter Maximum of said reference pulses.
    Type: Application
    Filed: December 16, 2016
    Publication date: April 6, 2017
    Inventors: Franciscus Johannes Achten, Denis Molin, Pierre Sillard, Marianne Bigot-Astruc
  • Publication number: 20160252674
    Abstract: A multimode optical fiber includes a central core surrounded by an outer cladding. The central core has a graded-index profile with respect to the outer cladding and an outer radius r1 of between about 30 microns and 50 microns (e.g., between about 35 microns and 45 microns). The optical fiber also includes an inner cladding positioned between the central core and the outer cladding, and a depressed trench positioned between the inner cladding and the outer cladding. The multimode optical fiber exhibits reduced bending losses.
    Type: Application
    Filed: May 11, 2016
    Publication date: September 1, 2016
    Inventors: Denis Molin, Pierre Sillard, Marianne Bigot-Astruc, Frans Gooijer, Franciscus Johannes Achten
  • Publication number: 20160254861
    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.
    Type: Application
    Filed: October 15, 2013
    Publication date: September 1, 2016
    Inventors: Denis Molin, Pierre Sillard, Marianne Bigot-Astruc
  • Publication number: 20160231503
    Abstract: 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 ?i graded-index profile with ?i?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 ?m 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.
    Type: Application
    Filed: September 20, 2013
    Publication date: August 11, 2016
    Inventors: Pierre Sillard, Denis Molin, Marianne Bigot-Astruc
  • Publication number: 20160223743
    Abstract: The invention relates to an optical fiber comprising an optical core and an optical cladding surrounding the optical core, the optical core having a single ? graded-index profile with ??1, and the optical core having a radius R1 and a maximal refractive index n0, said optical cladding having a refractive index nCl. Said optical cladding comprises a region of depressed refractive index ntrench, having an inner radius R2, with R2?R1, and an outer radius R3, with R3>R2. According to embodiments of the invention, the ?-value of said graded index profile and the optical core radius R1 are chosen such that R1?13.5 ?m and so as to satisfy a criterion C of quality. Thus, the invention provides a few-mode optical fiber, which allow guiding an increased number of LP modes as compared to prior art FMFs, while reaching the lowest Differential Mode Group Delay. The system reach is thus increased over prior art.
    Type: Application
    Filed: September 30, 2013
    Publication date: August 4, 2016
    Inventors: Pierre Sillard, Denis Molin, Marianne Bigot-Astruc
  • Patent number: 9405062
    Abstract: A multimode optical fiber includes a central core and an outer cladding (e.g., an outer optical cladding). Typically, the optical fiber's central core is a depressed, central core having an alpha-index profile (i.e., a graded-index profile), an outer radius r1, and a maximum refractive index difference ?n1 with respect to the outer cladding. The central core's alpha-index profile has a minimum refractive index at the central core's outer radius r1 that corresponds to a refractive index difference ?nend with respect to the outer cladding. Exemplary optical-fiber embodiments may include an inner cladding having an outer radius r2 and a width w2. Exemplary optical-fiber embodiments may include a buried trench having a width w3 and an outer radius r3. Furthermore, exemplary optical-fiber embodiments may include an intermediate cladding having an outer radius r4 and a width w4.
    Type: Grant
    Filed: April 26, 2012
    Date of Patent: August 2, 2016
    Assignee: Draka Comteq B.V.
    Inventors: Gertjan Krabshuis, Adrian Amezcua-Correa, Frans Gooijer, Gilles Melin, Gerard Kuyt, Franciscus Johannes Achten, Stephanus Gerardus Fransiscus Geerings, Marianne Bigot-Astruc
  • Patent number: 9377579
    Abstract: A method of assessing the power penalty at a given bit error rate of a multimode fiber including measuring a set of elementary fiber responses corresponding to different offset launches of light over the core radius into the multimode fiber, generating a global fiber response by applying, to the set of elementary fiber responses, a set of weighting coefficients and delays depending on the different offset launches of the elementary fiber responses, and computing a parameter representative of a fiber power penalty from the global fiber response, wherein the set of weighting coefficients includes several subsets of weighting coefficients time delayed relative to one another, wherein at least one relative time delay is not set to zero, and wherein weighting coefficients of each subset depend on the different offset launches of the elementary fiber responses.
    Type: Grant
    Filed: October 16, 2012
    Date of Patent: June 28, 2016
    Assignee: DRAKA COMTEQ B.V.
    Inventors: Denis Molin, Pierre Sillard, Marianne Bigot-Astruc
  • Publication number: 20160147013
    Abstract: A multimode optical fiber is provides, which includes an optical core and an optical cladding surrounding the optical core. The optical core has a refractive graded-index profile. The optical cladding includes: an inner layer surrounding the optical core, an intermediate layer, called a “depressed trench”, surrounding the inner layer, and an outer layer surrounding the depressed trench and having a constant refractive index. The depressed trench has a width W and a negative refractive index difference ?nt with respect to the outer layer, and is designed so as to satisfy the following inequality: |0.585677?114.681×S+13.7287×S2+18.7343×S×W?4.61112×S×?nt·103?0.913789×W×?nt·103|+2×W×?nt·103<?30 wherein: S is the width of the inner cladding, which is included between 0.6 ?m and 1.6 ?m; ?nt is included between ?11.10?3 and ?4.10?3; and W×?nt·103 is lower than ?25 ?m.
    Type: Application
    Filed: June 26, 2013
    Publication date: May 26, 2016
    Inventors: Denis Molin, Marianne Bigot-Astruc, Pierre Sillard, Franciscus Johannes Achten
  • Patent number: 9341771
    Abstract: A multimode optical fiber includes a central core surrounded by an outer cladding. The central core has a graded-index profile with respect to the outer cladding and an outer radius r1 of between about 30 microns and 50 microns (e.g., between about 35 microns and 45 microns). The optical fiber also includes an inner cladding positioned between the central core and the outer cladding, and a depressed trench positioned between the inner cladding and the outer cladding. The multimode optical fiber exhibits reduced bending losses.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: May 17, 2016
    Assignee: Draka Comteq, B.V.
    Inventors: Denis Molin, Pierre Sillard, Marianne Bigot-Astruc, Frans Gooijer, Franciscus Johannes Achten
  • Patent number: 9014525
    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.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: April 21, 2015
    Assignee: Draka Comteq, B.V.
    Inventors: Denis Molin, Pierre Sillard, Marianne Bigot-Astruc
  • Patent number: 8879878
    Abstract: A depressed graded-index multimode optical fiber includes a central core, an inner depressed cladding, a depressed trench, an outer depressed cladding, and an outer cladding. The central core has an alpha-index profile. The depressed claddings limit the impact of leaky modes on optical-fiber performance characteristics (e.g., bandwidth, core size, and/or numerical aperture).
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: November 4, 2014
    Assignee: Draka Comteq, B.V.
    Inventors: Marianne Bigot-Astruc, Denis Molin, Pierre Sillard
  • Patent number: 8867879
    Abstract: A single-mode optical fiber includes a central core, an intermediate cladding, a buried trench, and optical cladding. The central core has an outer radius r1 and a refractive index difference ?n1 relative to the optical cladding. The intermediate cladding has an outer radius r2 and a refractive index difference ?n2 relative to the optical cladding. The buried trench has an outer radius r3 and a refractive index difference ?n3 relative to the optical cladding. The optical fiber typically has an effective area of about 150 ?m2 or greater at a wavelength of 1550 nanometers and exhibits low bending losses.
    Type: Grant
    Filed: July 1, 2011
    Date of Patent: October 21, 2014
    Assignee: Draka Comteq, B.V.
    Inventors: Marianne Bigot-Astruc, Pierre Sillard, Simon Richard
  • Patent number: 8837889
    Abstract: An optical transmission fiber comprises a central core having an index difference ?n1 with an outer optical cladding; a first inner cladding having an index difference ?n2 with the outer cladding; and a second buried inner cladding having an index difference ?n3 with the outer cladding of less than ?3·10?3. The second buried inner cladding moreover contains Germanium in a weight concentration of between 0.5% and 7%. The fiber shows reduced bending and microbending losses while exhibiting the optical performances of a standard single-mode fiber (SSMF).
    Type: Grant
    Filed: August 3, 2011
    Date of Patent: September 16, 2014
    Assignee: Draka Comteq, B.V.
    Inventors: Louis-Anne de Montmorillon, Denis Molin, Pieter Matthijsse, Frans Gooijer, Ivo Flammer, Yves Lumineau, Marianne Bigot-Astruc, Pierre Sillard, Pascale Nouchi
  • Patent number: 8798423
    Abstract: A single-mode optical fiber includes a central core surrounded by an outer cladding. The optical fiber includes at least first and second depressed claddings positioned between the central core and the outer cladding. The central core typically has a radius of between about 3.5 microns and 5.5 microns and a refractive-index difference with the outer cladding of between about ?1×10?3 and 3×10?3. The first depressed cladding typically has an outer radius of between about 9 microns and 15 microns and a refractive-index difference with the outer cladding of between about ?5.5×10?3 and ?2.5×10?3. The second depressed cladding typically has an outer radius of between about 38 microns and 42 microns and a refractive-index difference with the first depressed cladding of between about ?0.5×10?3 and 0.5×10?3.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: August 5, 2014
    Assignee: Draka Comteq, B.V.
    Inventors: Pierre Sillard, Marianne Bigot-Astruc