Siemens Aktiengesellschaft

Finisar Corporation

Optun (bvi) Ltd.

Hartmut Schneider

Egon Lebetzki

Armin Staudt

Franz Auracher

Josef Grabmaier

Holger Karstensen

Alfred Papp

Christian Gerndt

Stefan Groetsch

Werner Spaeth

Ekkehard Klement

Ingo Baumann

Georg Boeck

Friedrich Weidinger

Reinhard Marz

Helmut Zarschizky

Wolfram Vogt

Helmut Zrschizky

Achim Schoberth

Helmut Albarecht

The invention relates to an optoelectronic component and a method for producing it, in particular a waveguide structure, featuring at least one irradiation-sensitive structure in a layer structure of the optoelectronic component, the refractive index of the irradiation-sensitive structure being able to be permanently altered in a manner dependent on an irradiation. It is thus possible to change the properties of at least one layer, in particular of an optical waveguide, in a targeted manner by means of a simple method step.

Optoelectronic component with an adjustable optical property and method for producing the layer structure

The invention relates to a thermo-optical waveguide switch which is located on a substrate. Said switch comprises a glass layer, through which a waveguide extends. A hollow chamber which lies beneath the waveguide thermally decouples the latter from the substrate. At least two supports are located in the hollow chamber to provide mechanical stability. One production method for obtaining a thermo-optical waveguide switch consists of creating a glass layer with an arrangement of perforations on a substrate. At least one hollow chamber containing at least two supports is formed by isotropically underetching the glass layer. The hollow chamber is subsequently sealed and a waveguide is formed above said hollow chamber. Another production method first creates a waveguide in a glass layer which is formed on a substrate. The glass layer in the vicinity of the waveguide is then removed using a mask and the waveguide is at least partially underetched by an isotropic etching process, thus forming a hollow chamber containing at least two supports below the waveguide.

Thermo-optical waveguide switch

The transmission module is composed of a housing that hermetically tightly surrounds a cavity containing a plurality of semiconductor lasers and comprises a plurality of optical connecting waveguides secured hermetically tight in the housing, each of which optically connecting a respective laser in the cavity to a respective fiber leading away from the outside of the housing.

Hermetically and tightly sealed optical transmission module

Process for the production of a waveguide beam converter for shaping a laser beam collection. A plurality of waveguides are produced and arranged in such a way that at least one individual laser beam can be injected into each waveguide. The waveguides are firstly produced on a substrate using planar technology, and subsequently detached from the substrate over a part of their length, starting from their beam exit ends. The free ends are then arranged and fixed in accordance with an intended output beam arrangement of the output laser beam collection.

Process for the production of a waveguide beam converter

An optical planar waveguide for conducting an optical radiation along an axis consists of a wave-conducting core that extends along the axis and a coating that extends along the axis and surrounds the core, with the coating having at least one hollow space in the solid material of the coating. The waveguide is preferably made by forming a plurality of layers and by forming recesses in one of the layers, which recesses are covered to create the hollow spaces.

Planar optical waveguide having a core with a coating having a hollow

An arrangement which converts a plurality of light beams having a small beam cross-section into a light beam having a larger cross-section comprises a plurality of waveguide cores with each core having a first end face which is oblong and arranged for receiving light from each of the light rays having the smaller beam cross-section and each core has a second end face which are arranged together and extend in a different direction than the first end faces for coupling light with the beam having the large beam cross-section. Preferably, each of the cores is fashioned in the form of a bisphenoid so that the first and the second core end faces are oblong in directions extending perpendicular to one another.

Arrangement for producing a conversion between light rays having a small

Means for connecting electronic devices for communication with one

An arrangement for optically coupling a planar optical waveguide and an optical fiber comprises forming a planar optical waveguide on a surface of the substrate, forming a trench-like depression in the surface of the substrate leading from an end face of the planar waveguide to an edge of the substrate, forming a second holder part having a fiber secured between two planar surfaces lying in a common plane, assembling the separate holder part on a pair of planar surfaces lying on each side of the depression of said substrate so that the fiber is placed in the depression with play and the fiber will be arranged with the axis of the fiber being aligned with the axis of the planar waveguide.

Arrangement for an optical coupling of a fiber to a planar optical

Optical fiber composed of a glass doped with at least laser-active ions of an element from the rare earths. An optical fiber of glass, preferably a HMF glass, doped with Tm.sup.3+ is operated at 1.48 .mu.m as a fiber laser or amplifier on the laser transition .sup.3 F.sub.4 -.sup.3 H.sub.4. Since this thereby involves a self-saturating transition, the terminal level is emptied in accelerated fashion for a continuous wave mode by co-doping with de-activators, preferably Ho.sup.3+, Tb.sup.3+, Eu.sup.3+ and/or Pr.sup.3+ ions. The pump light wavelength can be selected from the wavelength range from 700 through 890 nm of GaAlAs emission. The optical fiber can be used in optical amplifiers or fiber amplifiers.

Optical fiber composed of glass doped with laser-active ions of an

A method for manufacturing optical fibers from halide glass is provided. The method includes the steps of drawing a glass mass into a fiber in a dry gas atmosphere which contains a drying agent. In a further step of the process, an OH band which may still be present can be reduced by treating the fiber with a gaseous drying agent.

Method for producing an optical fiber of halide glass, particularly an

A process for producing optical fibers of high tensile strength, wherein the fiber is pulled from a glass mass of halide glass and includes surrounding the fiber and mass with a dry gas atmosphere containing a drying agent which reacts with moisture and this dry gas atmosphere includes fluorine-containing agents, in particular NF.sub.3, as the drying agent.

Process for producing optical fibers of high tensile strength

A birefringent optical waveguide structure comprises at least one or more strip waveguides of a first material embedded in a cladding layer of a second glass with at least one additional layer being applied on the cladding layer. The strip waveguides have a refractive index which is higher than the refractive index of the second glass of the cladding layers and the additional layer applies a mechanical stress to the strip waveguides which has a component extending perpendicular to the strip waveguides. Preferably, the mechanical stress is formed by the material of the additional layers having a different thermal expansion coefficient and a different elasto-optical coefficient than the materials forming the cladding layer and the strip waveguides. The method of forming the device includes rapidly cooling the structure from an elevated temperature to room temperature to create the mechanical stresses.

Birefringent optical waveguide structure having a strip waveguide buried

A method for the manufacture of a preform of barium containing heavy metal fluoride glass comprising a core and a jacket for drawing infrared light waveguides for optical communications technology by casting molten glass onto a predetermined body of solid glass. Hitherto, such a method was executed such that molten core glass was cast into a tube of jacket glass. In order to achieve thicker preforms, one proceeds such here that a solid row of the core glass is surrounded with molten jacket glass. The boundary surface between core and jacket of the generated preform can be improved in the method disclosed herein that the surface of the solid rod is etched before being surrounded with the jacket glass. A nearly perfect boundary surface is obtained by etching with a ZrOCl.sub.2 solution.

Method for the manufacture of a preform for drawing glass fibers

A fiber taper in the form of a fiber with a conically tapering at one end and having a step-shaped refractive index profile which is particularly used for coupling a single-mode fiber to a semiconductor laser. The fiber will have a core with a high index of refraction surrounded by an intermediate core layer with an index of refraction being lower by a defined index of refraction difference than the index of refraction of the core. The intermediate core layer is surrounded by a jacket or cladding layer of a lower refractive index which is lower than the refractive index of the core layer by a defined refractive index difference. An expanding beam is established given such a taper and an adiabatic mode matching from one to the other core can be achieved along the taper.

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Munich, Germany

Hartmut Schneider