Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Fisens Gmbh

Photonik Inkubator Gmbh

Baker Hughes Inteq Gmbh

Fisensgmbh

Christian Waltermann

Wolfgang Schade

Thomas Kruspe

Sebastian Jung

Gunnar Tackmann

Martin Angelmahr

Michael Köhring

Konrad Bethmann

Philip Erik Guhlke

Jan Koch

Wolfgang Schippers

Philip Erik GÜHLKE

The invention relates to a device for optical applications, which has an optical waveguide (), to which a light source () can be connected. The optical waveguide () is designed in such a way that light emitted by the connectable light source () propagates along a light propagation axis (). A wavelength-sensitive grating structure () in the optical waveguide () has detectors (), which are arranged in such a way that the detectors absorb partial amounts of the light of the light source () that is scattered by the wavelength-sensitive grating structure (). The grating structure () in the optical waveguide () is constructed of periodically arranged ellipsoid structural elements (). The ellipsoid structural elements () have a different index of refraction than the material of the optical waveguide () surrounding the ellipsoid structural elements. The ellipsoid structural elements () have a longitudinal axis and a short axis, which are substantially perpendicular to the light propagation axis (). Depending on the wavelength, partial amounts of the light scattered by the grating structure () are coupled out of the optical waveguide (). The light hits the detectors (). An absorbing or partially reflecting filter () is arranged between at least one of the detectors () and the optical waveguide (). The detectors () have measuring elements for the intensity of the partial amount of the light that hits the detector () in question. An evaluation element is provided, which determines a wavelength from the intensity ratio of the plurality of detectors (). The detectors () are arranged in such a way that the detectors either are arranged opposite each other on different sides of the long axes of the

Device for optical applications

The present invention relates to an apparatus for optical applications, a spectrometer system and method for producing an apparatus for optical applications, and in particular to an apparatus comprising an optical waveguide having a first refractive index along a light propagation axis interrupted by a plurality of scattering portions having a second refractive index. Each scattering portion has a long axis substantially perpendicular to the light propagation axis as well as a short axis substantially perpendicular to the light propagation axis and the long axis. A receiver unit or a transmitter unit is arranged on a side of the optical waveguide, the long axis being substantially perpendicular, i.e. normal to the plane of this side on which the receiver unit or transmitter unit is arranged. Accordingly, simplification and miniaturization of an optical apparatus can be realized.

Apparatus for optical applications, spectrometer system and method for producing an apparatus for optical applications

A method for determining a curvature and/or torsion of an optical waveguide of a fibre-optic sensor, comprising at least two Bragg gratings introduced into the optical waveguide and extending through a common cross-sectional plane, situated in a radial direction, through the optical waveguide, wherein the Bragg gratings are introduced in the core and/or on the boundary between the core and the cladding and/or in an inner edge region of the cladding within an evanescence region of the light, the method comprising: providing reference data of intensities of reflected light portions of light coupled into the optical waveguide, in particular depending on known reference deformations of the optical waveguide, measuring at least one light intensity of reflected light portions of light coupled into the optical waveguide, wherein the optical waveguide has a deformation to be determined, and determining the deformation by comparing the light intensity with the reference data.

Method for determining the curvature and/or torsion of an optical waveguide

An optical component comprising at least one first waveguide having a first core and a casing surrounding the first core, and comprising at least one second waveguide having a second core, wherein the first core and the second core are guided adjacent and at a distance to one another in a longitudinal section, and at least one Bragg grating is arranged in said longitudinal section, and at least the first core, the first casing the second core and the Bragg grating are arranged in a single substrate.

Optical component and method for the production thereof

A fiber optic sensor may be provided comprising an optical waveguide having at least one first core and a cladding surrounding the first core, wherein the first core extends substantially over the entire length of the optical waveguide and at least one Bragg grating is introduced into the first core, wherein the Bragg grating has an elongated cross section, wherein the short semi-axis is smaller than the diameter of the first core and the center of gravity of the cross section of the at least one Bragg grating lies on the axis of symmetry of the optical waveguide. A method may be provided for determining torsion with such a sensor. A method for the production of such a sensor may be provided.

Fiber-optic sensor and method for the production and use thereof

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Goslar, Germany

Christian Waltermann