Draka Comteq B.v.

Alcatel

Draka Comteq France

Teradata Us, Inc.

Denis Molin

Pierre Sillard

Marianne Bigot-Astruc

Louis-Anne De Montmorillon

Yves Lumineau

Simon Richard

Marianne Bigot

Frans Gooijer

Franciscus Johannes Achten

Koen De Jongh

Pascale Nouchi

Pieter Matthijsse

David Boivin

Asghar Gholami

Pierre Sansonetti

Maxime Gorlier

Ludovic Fleury

Ivo Flammer

Emmanuel Petitfrere

Bob J Overton

Florent Beaumont

Elise Regnier

Ralph Petrus Johannes Adrianus Van Lankveld

Gertjan Krabshuis

Lionel Provost

Bruno Dany

Lionel Expert

Alexander Smirnov

Zunnoor Tarique

Adrian Amezeua-Correa

Adrian Amezcua-Correa

Nam Nguyen Thang

Jean-Charles Ravon

Christopher Ian Hillman

Louis-Anne Montmorillon

M Elise Regnier

A SQL query performs a function. The SQL query includes a SQL operator that has two input relations. The first input relation is a script relation having a plurality of script records. Each script record includes a transformation field, the contents of which specify a transformation to be performed by the SQL operator. The second input relation is a parameter relation having a plurality of parameter records. Each parameter record includes a data-to-process field that identifies data to be processed by the transformation specified in the transformation field of a selected script record. The selected script record is determined by a mapping. The SQL operator has one output relation having a plurality of output records. Each output record contains the result of transformation specified in a respective selected script record using the data to be processed identified in the data-to-be-processed field in a respective selected parameter record.

SQL primitives for hyperscale python machine learning model orchestration

The invention concerns a method for characterizing mode group properties of multimodal light traveling through an optical component, comprising: The Mode Group Separating optical fiber is a multimode fiber with an &#x3b1;-profile graded index core with an &#x3b1;-value chosen such that said fiber satisfies the following criterion at the wavelength &#x3bb;: where:

Method for characterizing mode group properties of multimodal light traveling through optical components

A few mode optical fiber that includes an optical core and an optical cladding surrounding the optical core. The FMF has a step-index profile. The optical core has a core outer radius R&#x2265;7.5 &#x3bc;m and a core refractive index difference &#x394;nsuch that 14.5&#xd7;10&#x3c;&#x394;n&#x3c;24&#xd7;10. The optical cladding comprises:

Weakly coupled few-mode fibers for space-division multiplexing

A multimode optical fiber () comprises an a-profile graded index core, a trench () surrounding the core () and an intermediate cladding () between the core and the trench. Such a multimode optical fiber () has: &#x2014;A mode carrying capacity between 54 and 68 LP modes at 1060 nm, defined by a specific relationship between the numerical aperture of the core and the core radius, &#x2014;A defined relationship between trench, core and intermediate cladding parameters to achieve a high bandwidth and low bend-loss at 1060 nm, and&#x2014;A core radius between 24 and 26 &#x3bc;m, a numerical aperture between 0.190 and 0.225 and a value of a between 2.01 and 2.05 to retain compatibility with legacy fibers.

Multimode optical fiber optimized to operate around 1060 nm, and corresponding multimode optical system

An optical fiber having an optical core and an optical cladding surrounding the optical core, the optical core having a single &#x3b1; graded-index profile with &#x3b1;&#x2265;1, &#x3b1; being a non-dimensional parameter that defines the index profile shape of the optical core, and the optical core having a maximal refractive index nat its center; the optical cladding has at its outer edge a refractive index n, and comprises a region of depressed refractive index n, called a trench, with a negative refractive index difference &#x394;n=n&#x2212;nwith respect to said optical cladding, the trench having an outer radius R. The optical core and cladding are configured to support propagation of at least six spatial modes and at maximum fifty-five spatial modes at an operating wavelength &#x3bb;between, and including, 1460 nm and 1675 nm, and the optical core satisfies an ovality criterion between 0.05 and 0.3, when said ovality criterion is measured at a circumference of equal index nwithin said core, such that &#x394;n&#x2212;n&#x2212;nis less than 75% of &#x394;n=n&#x2212;n, said ovality criterion o being defined by the following equation: where a is a length of a semi-major axis of said circumference and b is a length of a semi-minor axis of said circumference.

Coupled few mode fibers, and corresponding optical link and optical system

The invention relates to a method for qualifying the actual effective modal bandwidth of a multimode optical fiber over a predetermined wavelength range, comprising the steps of: carrying out () a Dispersion Modal Delay (DMD) measurement of the multimode optical fiber at a single wavelength to obtain an actual DMD plot; generating () at least two distinct modified DMD plots from the actual DMD plot, each modified DMD plot being generated by applying to the recorded traces a temporal delay &#x394;t that increases in absolute values with the radial offset value r, each modified DMD plot being associated with a predetermined bandwidth threshold (S1; S2); for each modified DMD plot, computing () an effective modal bandwidth as a function of said modified DMD plot and comparing () the computed effective modal bandwidth (EMBc; EMBc) with the bandwidth threshold value to which the modified DMD plot is associated; () qualifying the actual effective modal bandwidth as a function of results from the comparing step.

Method for qualifying the effective modal bandwidth of a multimode fiber over a wide wavelength range from a single wavelength DMD measurement and method for selecting a high effective modal bandwidth multimode fiber from a batch of multimode fibers

A method for selecting wide-band multimode optical fibers from a single wavelength, the method comprising the following steps of, for each multimode optical fiber obtaining a first DMD plot using a measurement of DMD carried out at a first single wavelength, obtaining from the first DMD plot, a first multimode fiber specification parameter; and for each fiber: obtaining from the first DMD plot, a curve representative of a radial offset delay, called ROD curve, as a function of the radial offset value; applying a linear fit on the ROD curve for at least two radial offset value ranges; obtaining from the linear fit and for each radial offset value range, an average radial offset delay slope, called ROD slope; selecting the multimode optical fibers meeting a first predetermined specification criterion for the first multimode fiber performance parameter, and for which the at least two computed ROD slopes meet a predetermined slope criterion.

Method for selecting wide-band multimode fibers from a single wavelength characterization

The invention concerns a method for characterizing mode group properties of multimodal light traveling through an optical component, comprising: where:

A method of qualifying an effective bandwidth of a multimode optical fiber at a first wavelength &#x3bb;, using DMD data of the fiber measured a second wavelength &#x3bb;. 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 &#x3bb;. A transformation is performed on the ROD data and ROB data at the second wavelength &#x3bb;to obtain corresponding ROD data and ROB data at the first wavelength &#x3bb;. An effective bandwidth of the fiber at the second wavelength &#x3bb;is computed using the ROD data and the ROB data at the first wavelength &#x3bb;and the {tilde over (P)}data at the second wavelength &#x3bb;.

Method of qualifying wide-band multimode fiber from single wavelength characterization using EMB extrapolation, corresponding system and computer program

Few mode optical fibers for mode division multiplexing. The Few Mode Fiber supporting 25 or 30 LP guided modes and includes a graded index core with a &#x3b1;-profile, a radius R(at 0 refractive index difference) between 21.5 and 27 &#x3bc;m and a maximum refractive index difference Dnbetween 12.5&#xd7;10and 20&#xd7;10, and an end of the &#x3b1;-profile at a radius R, with index difference Dn; a trench surrounding the core with radius Rbetween 30 and 42 &#x3bc;m and refractive index difference Dnbetween &#x2212;15.10and &#x2212;6.10, an intermediate depressed trench with a radius R, with R&#x3c;R&#x3c;Rand a refractive index difference Dn, with Dn&#x3c;Dn&#x3c;0, wherein: for |Dn&#x2212;Dn|&#x3e;=0.5&#xd7;10&#x2212;3, Min(Dn, Dn)&#x2264;&#x2212;1.5&#xd7;10&#x2212;3, and for |Dn&#x2212;Dn|&#x3c;0.5&#xd7;10&#x2212;3, Dnis between &#x2212;5&#xd7;10&#x2212;3 and &#x2212;3.5&#xd7;10&#x2212;3.

Few mode optical fibers for mode division multiplexing having intermediate trenches

Few mode optical fibers for mode division multiplexing. The Few Mode Fiber supporting 25 or 30 LP guided modes and includes a graded index core with a &#x3b1;-profile, a radius R(at 0 refractive index difference) between 23 and 27 &#x3bc;m and a maximum refractive index difference Dnbetween 14&#xb7;10and 17&#xb7;10, and an end of the &#x3b1;-profile at a radius R, with index difference Dn; a trench surrounding the core with radius Rbetween 30 and 40 &#x3bc;m and refractive index difference Dnbetween &#x2212;15&#xb7;10and &#x2212;6&#xb7;10. Such a FMF shows a specific design of the interface between the core and the cladding such that R&#x3e;R, Dnbetween &#x2212;10&#xb7;10and &#x2212;3&#xb7;10, and Dn&#x2212;Dn&#x2265;0.9&#xd7;10.

Few mode optical fibers for mode division multiplexing

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.

Method of measuring time delays with respect to differential mode delay (DMD) of a multi-mode fiber (MMF) or a few-mode fiber (FMF)

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.

Method for characterizing performance of a multimode fiber optical link and corresponding methods for fabricating a multimode optical fiber link showing improved performance and for improving performance of a multimode optical fiber link

The invention relates to an optical link comprising N optical fibers, with N&#x2265;2. Each optical fiber comprises an optical core and an optical cladding surrounding the optical core, the optical core having a single &#x3b1;graded-index profile with &#x3b1;&#x2265;1, and the optical core having a radius R, where i E [1; N] is an index designating said optical fiber. Said optical cladding comprises a region of depressed refractive index n, called a trench, surrounding the optical core. According to embodiments of the invention, for all optical fibers in said link, said optical core radius Rand said length Lare chosen such that R&#x2265;13.5 &#x3bc;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.

Few mode optical fiber links for space division multiplexing having trenched fibers with high leak losses for leaky modes and low bend losses

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=(R/&#x3bb;)(n&#x2212;n) between 7 and 52, where Ris the multimode core radius, nis the maximum index of the multimode core and nis 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: &#x2212;2.20&#x3c;Dn&#x3c;0, where Dnis the index difference of depressed region with external cladding, and 220 Ln(N)&#x2212;1100&#x3c;V&#x3c;220 Ln(N)&#x2212;865, where Vis the volume of the depressed region. Such a multimode fiber shows an increased OFL-bandwidth above 10000 Hz&#xb7;km at an operating wavelength between 950 nm and 1310 nm.

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Draveil, France

Denis Molin