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

Friedrich-schiller-universitaet Jena

Friedrich-schiller-universitat Jena

Active Fiber Systems Gmbh

Tino Eidam

Jens Limpert

Andreas Tuennermann

César Jáuregui Misas

Andreas Tünnermann

Florian Jansen

Fabian Roeser

Fabian Stutzki

Arno Klenke

Enrico Seise

Damian Schimpf

Hans-Jürgen Otto

Steffen Hädrich

Bettina Limpert

Fabian Röser

Damian N Schimpf

Jan Rothhardt

The invention relates to an optical fiber as an optical waveguide for the single-mode operation. The present invention proposes a fiber having a microstructure, by which the propagation of modes of a higher order are selectively suppressed in the optical waveguide. At the same time, the propagation of transversal modes of a higher order is dampened more strongly than the propagation of the fundamental modes of the optical waveguide.

Single mode propagation in microstructured optical fibers

The invention relates to a method and corresponding devices for reducing mode instability in an optical waveguide (), a light signal becoming unstable in the optical waveguide () beyond an output power threshold and energy being transformed from a basic mode into higher order modes. The invention proposes a reduction in temperature variation () along the optical waveguide () and/or a reduction in changes in the optical waveguide () that are caused by spatial temperature variation as a result of mode interference.

Method and device for reducing mode instability in an optical waveguide

Single-mode propagation in microstructured optical fibers

The invention relates to a laser device () for amplifying and/or transporting electromagnetic radiation, comprising a radiation source () for generating the electromagnetic radiation and an amplifier () for amplifying or a medium for transporting the generated electromagnetic radiation. In order to make available a device () for amplifying or transporting electromagnetic radiation that provides a very easy to implement possibility for reducing the influence of non-linear effects, the electromagnetic radiation propagating in the amplifier () or medium is largely non-linearly polarized.

Device for amplifying and/or transporting electromagnetic radiation

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Jena, Germany

Tino Eidam