Trumpf Laser Gmbh & Co. Kg

Trumpf Laser Gmbh

Sven Schad

Alexander Killi

Lutz Schuler

Jürgen Mösner

In a laser device having at least one gas-purged laser resonator which is arranged in a purging gas circuit which has upstream of the laser resonator both a low pressure generator for generating a purging gas excess pressure in the purging gas circuit and, between the low pressure generator and the laser resonator, a cleaning device for cleaning the purging gas, the purging gas being air, according to the invention the purging gas circuit has downstream of the laser resonator between the laser resonator and the low pressure generator an intake opening which is permanently open towards the atmosphere, the purging gas pressure (p) generated by the low pressure generator being greater than the atmospheric air pressure (p).

Laser device having a gas-purged laser resonator

A pump light assembly () for a disc laser (), comprising: a focusing device, in particular a concave mirror (), having a reflecting surface () for focusing a pump light beam () onto a laser-active medium (), and a deflecting assembly for deflecting the pump light beam () between reflecting regions formed on the reflecting surface () and disposed in different angular regions about a central axis () of the reflecting surface (). The deflecting device is configured to produce a deflection of the pump light beam () between in each case two of the reflecting regions with an optical path length (2 f+2 d1; 2 f+2 d2) that is greater than the optical path length (2f) in the case of telecentric imaging in order to compensate for a beam expansion of the pump light beam (), caused by aberrations of the focusing device (), in successive focusings onto the laser-active medium (). The invention also relates to a disc laser () and to a method for pumping a laser-active medium ().

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Rottweil, Germany

Sven Schad