LASER SYSTEM HAVING SPECTRAL FILTRATION

The invention relates to a laser system comprising a pulsed laser 1. Laser systems on the basis of pulsed lasers are used to generate ultra-short laser pulses. Only complicated, mode-coupled laser systems which can achieve a pulse duration below 10 ps have been known until now from the prior art. However, said systems are always complex and sensitive free beam structures. Therefore the aim of the invention is to produce a laser system which generates pulse durations below 10 ps and can also be produced in a simple and compact manner. In order to achieve said aim, according to the invention the laser system has a spectrally broadening element (2) which spectrally broadens the initial laser pulses of the pulsed laser 1 by means of self-phase modulation, and a spectrally filtering element (3) which temporally compresses the spectrally broadened laser pulses by means of spectral filtering; the spectral filtering can take place via an interference filter or by amplification using, for example, a narrow-band Nd:YAG amplifier. Further pulse shaping takes place by a saturable absorber (4) and a further amplifier (5).