Draka Comteq B.v.

Franciscus Johannes Achten

Denis Molin

Marianne Bigot-Astruc

Pierre Sillard

Frans Gooijer

Louis-Anne De Montmorillon

Pascale Nouchi

Bob J Overton

Yves Lumineau

Simon Richard

Pieter Matthijsse

Gertjan Krabshuis

Ivo Flammer

Emmanuel Petitfrere

David Boivin

Gilles Melin

Gerard Kuyt

Adrian Amezcua-Correa

Nam Nguyen Thang

Stephanus Gerardus Fransiscus Geerings

Piet Matthijsse

Marianne Astruc-Bigot

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

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

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)

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 rof 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.

Bend-resistant multimode optical fiber

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 &#x394;nwith respect to the outer layer, and is designed so as to satisfy the following inequality:|0.585677&#x2212;114.681&#xd7;+13.7287&#xd7;+18.7343&#xd7;&#x2212;4.61112&#xd7;0.1&#x2212;0.913789&#xd7;0.1|+2&#xd7;0.1&#x3c;&#x2212;30wherein: S is the width of the inner cladding, which is included between 0.6 &#x3bc;m and 1.6 &#x3bc;m; &#x394;nis included between &#x2212;11.10and &#x2212;4.10; and W&#xd7;&#x394;n0.1is lower than &#x2212;25 &#x3bc;m.

Bend-insensitive multimode optical fiber with reduced impact of leaky modes

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 r, and a maximum refractive index difference &#x394;nwith respect to the outer cladding. The central core's alpha-index profile has a minimum refractive index at the central core's outer radius rthat corresponds to a refractive index difference &#x394;nwith respect to the outer cladding. Exemplary optical-fiber embodiments may include an inner cladding having an outer radius rand a width w. Exemplary optical-fiber embodiments may include a buried trench having a width wand an outer radius r. Furthermore, exemplary optical-fiber embodiments may include an intermediate cladding having an outer radius rand a width w.

High-bandwidth, radiation-resistant multimode optical fiber

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 rof between about 22 microns and 28 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.

Multimode optical fiber

A method for determining optical properties of an optical fiber including providing optical fibers having varying values of an optical property, measuring values of the optical property of the fibers, selecting one of the fibers as a reference fiber, determining the relative backscatter coefficient of the fibers compared to the reference optical fiber, correlating data obtained in step ii) with data obtained in step iv) to obtain a calibration curve showing a correlation between the Rrel and the values of the optical property of the optical fibers, measuring the Rrel of another optical fiber compared to the reference fiber, and determining a value of the optical property of the another optical fiber based on the calibration curve obtained in step v).

Method for the characterization of optical properties of an optical fiber

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

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Tilburg, Netherlands

Franciscus Johannes Achten