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

Friedrich-schiller-universitaet Jena

Friedrich-schiller-universitat Jena

Dirk Nodop

Jens Limpert

Andreas Tuennermann

Alexander Steinmetz

Andreas Tünnermann

César Jauregui Misas

César JÀUREGUI Misas

The invention relates to an apparatus for generation of electromagnetic radiation, having a pump light source that emits an excitation radiation at a first wavelength, and having an optical waveguide that generates frequency-converted radiation at a second and a third wavelength, by means of degenerate wave mixing, from the excitation radiation of the pump light source.

Efficient frequency conversion

The invention relates to a laser system with a passively Q-switched laser, a spectrally widening element, and a compression element. Laser systems of this kind are utilized for generating ultra-short laser pulses. Systems, mode-coupled solid-state lasers known from prior art allow for generating laser pulses in the sub-10 ps range only with complicated and alignment-sensitive free-beam arrangements. Therefore, it is the object of the present invention to create a laser system that generates pulse durations of less than 10 ps and which is simple and compact to produce at the same time. In order to achieve this object, the present invention proposes that the passively Q-switched laseris provided with a longitudinally monomode output radiation which is spectrally widened by means of the spectrally widening elementby self-phase modulation and is temporally compressed by the compression element

Laser system with nonlinear compression

The invention relates to a Q-switched laser comprised of a pump light source (), an optical resonator accommodating a laser medium (), and a passive Q-switch (). It is the object of the present invention to provide an improved Q-switched laser which is of a simple and compact setup while having the least possible jitter of the repetition time. To achieve this target, the invention proposes that by means of a beam splitter () part of the light coupled out of the optical resonator is passed on to an optical delay line () and coupled back into the optical resonator upon having passed through the optical delay line ().

Stabilisation of the repetition rate of a passively Q-switched laser by means of coupled resonators

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Jena, Germany

Dirk Nodop