SHORT-PULSE LASER WITH A HIGH TEMPORAL CONTRAST

The invention relates to a laser system and a method for generating laser pulses with a high temporal contrast. The aim of the invention is to provide a laser system and a method which allow the temporal pulse contrast to be increased by multiple orders of magnitude using simple means. The method is...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	LIMPERT, Bettina, EIDAM, Tino
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING DEVICES USING STIMULATED EMISSION ELECTRICITY FREQUENCY-CHANGING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	The invention relates to a laser system and a method for generating laser pulses with a high temporal contrast. The aim of the invention is to provide a laser system and a method which allow the temporal pulse contrast to be increased by multiple orders of magnitude using simple means. The method is to be as flexibly applicable, efficient, and suitable for high-power applications as possible. According to the invention, this is achieved in that pulsed laser radiation generated by means of a short-pulse laser (1) passes through a spectral limiting means (2) such that the laser radiation does not have any spectral components beyond a threshold frequency (G). A non-linear frequency conversion is then carried out, in particular spectral broadening by means of self-phase modulation, in a non-linear optical element (3) such that the laser radiation now has spectral components beyond the threshold frequency (G). Finally, the laser radiation is spectrally filtered by means of an optical filter (4) which is permeable only beyond the threshold frequency (G).