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

Friedrich-schiller-universitaet Jena

Friedrich-schiller-universitat Jena

Alexander Steinmetz

Jens Limpert

Dirk Nodop

Andreas Tuennermann

Andreas Tünnermann

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

Alexander Steinmetz