Draka Comteq B.v.

Draka Fibre Technology B.v.

Drake Fibre Technology B.v.

Pieter Matthijsse

Frans Gooijer

Louis-Anne De Montmorillon

Denis Molin

Ivo Flammer

Pierre Sillard

Pascale Nouchi

Marianne Bigot-Astruc

Yves Lumineau

Mark Peter Marie Jetten

Mattheus Jacobus Nicolaas Van Stralen

Bob J Overton

Simon Richard

Franciscus Johannes Achten

Emmanuel Petitfrere

Elise Regnier

Marinus Jacob De Fouw

Gerard Kuyt

Gertjan Krabshuis

Koen De Jongh

David Boivin

Henrikus Lambertus Maria Jansen

Myrna Boon

Gerardus Franciscus Cleven

Adrian Amezcua-Correa

Antonius Cornelis Johannes Maria De Vetter

Johanna Catharina Van Lierop Jansen, Legal Representative

Adrian Amezeua-Correa

Gert-jan Krabshuis

M Elise Regnier

Myma Boon

Antonius Cornelis Johannus Maria De Vetter

The invention relates to a multimode optical fiber having a refractive index profile, comprising a light-guiding core surrounded by one or more cladding layers. The present invention furthermore relates to an optical communication system comprising a transmitter, a receiver and a multimode optical fiber.

Multimode optical fibre

An optical transmission fiber comprises a central core having an index difference &#x394;nwith an outer optical cladding; a first inner cladding having an index difference &#x394;nwith the outer cladding; and a second buried inner cladding having an index difference &#x394;nwith the outer cladding of less than &#x2212;3&#xb7;10. 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).

Single mode optical fiber

A multi-mode optical waveguide fiber including a central core region having an outer radius surrounded by an inner cladding region having an outer radius, the inner cladding region having a lower index of refraction than the central core region, wherein both the central core and inner cladding regions are doped with fluorine, wherein the refractive index profile of the central core region is of the gradient index type and the central core region in the range of r&#x3b5;[0-r] comprises germanium at a maximum concentration within the range of 0.5 percent by weight to 4.0 percent by weight taken at a given radius, wherein said fiber has an Overfilled Modal Bandwidth &#x3e;500 MHz&#xb7;km at a wavelength of 850 nm and 1300 nm, according to IEC 60793-2-10.

Depressed graded index multi-mode optical fiber

Disclosed is an optical transmission fiber having reduced bending and microbending losses that is commercially usable in FTTH or FTTC transmission systems.

Single-mode optical fiber

An optical transmission fiber comprises a central core having an index difference &#x394;with an outer optical cladding; a first inner cladding having an index difference &#x394;with the outer cladding; and a second buried inner cladding having an index difference &#x394;with the outer cladding of less than &#x2212;3&#xb7;10. 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 whilst exhibiting the optical performances of a standard single-mode fiber (SSMF).

The present invention relates to a single mode optical fiber comprising a first central region having a radius r1, a maximum refractive index value n1 and at least one second ring surrounding said first central region, which second ring has a radius r2 and a minimum refractive index value n2, wherein n2&#x3c;n1. The present invention furthermore relates to an optical communication system for multi-channel signal transmission.

Single mode optical fiber as well as optical communication system

An improved optical fiber achieves both reduced bending and microbending losses, as well as a much higher Brillouin threshold, as compared to standard transmission fibers. The optical fiber comprises a core including at least two dopants and having a refractive index difference &#x394;nwith an outer optical cladding, a first inner cladding having a refractive index difference &#x394;nwith the outer cladding, and a depressed, second inner cladding having a refractive index difference &#x394;nwith the outer cladding of less than &#x2212;3&#xd7;10. The radial concentration of at least one of the core dopants varies continuously over the entire core region of the optical fiber.

Optical fiber

The invention relates to an access network for exchanging communication signals between a transit network and at least one communication medium of a user. The communication medium is operatively connected to an exchange by means of an optical fiber connection for exchanging the communication signals, and the exchange is connected to the transit network. The fiber connection comprises at least one multimode fiber, which is bent over at least one first part of its length, in such a manner that the fiber comprises at least one complete winding in the first part thereof mainly for maintaining one or more modes of the communication signals into the fiber. Said modes have been selected from a group comprising the ground mode and one or more lower modes near the ground mode.

Optical communication system as well as a access network provided therewith

The present invention relates to a method and a device for manufacturing optical performs, in which one or more layers of glass, doped or undoped, are deposited onto the internal surface of a hollow substrate tube, which deposition is effected by supplying one or more reactive gas mixtures of glass-forming compounds tot the interior of the hollow substrate tube and subsequently generating a non-isothermal plasma in the hollow substrate tube, after which the preform is subjected to a contraction process for the purpose of forming a massive rod, from which optical fibres are drawn.

Method and device for manufacturing optical preforms, as well as the optical fibres obtained therewith

The present invention relates to a single mode optical fiber comprising a first central region having a radius r, a maximum refractive index value nand at least one second ring surrounding said first central region, which second ring has a radius rand a minimum refractive index value n, wherein n&#x3c;n. The present invention furthermore relates to an optical communication system for multi-channel signal transmission.

Single mode optical fibre as well as optical communication system

A single mode optical transmission fiber comprises a depressed core having at least 0.41 weight percent fluorine and an index difference (|&#x394;n|) with pure silica greater than 1.5&#xd7;10, a depressed cladding having at least 1.2 weight percent fluorine and an index difference (|&#x394;n|) with pure silica greater than 4.5&#xd7;10and an index difference (|&#x394;n|&#x2212;|&#x394;n|) with the depressed core greater than or equal to 3&#xd7;10.

Fluorine-doped optical fiber

An optical transmission fiber includes a central core having an index difference &#x394;nwith an outer optical cladding; a first inner cladding having an index difference &#x394;nwith the outer cladding; and a second buried inner cladding having an index difference &#x394;nwith the outer cladding of less than &#x2212;3.10. 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 whilst exhibiting the optical performances of a standard single-mode fiber (SSMF).

Growing community of inventors

Hapert, Netherlands

Pieter Matthijsse