Device for ablation of material by means of laser radiation

A device for the ablation of material by laser radiation, especially for treating biological substances in stomatologic, endoscopic, dermatologic, rhinoplastic and the like procedures, comprising:

• a pump laser for generating a radiation-exciting laser radiation;
• a laser converter for converting the pump laser radiation using direct absorption transitions into a laser radiation that is provided for the treatment having the wavelength range of 3 μm±0.2 μm;
• said laser converter is accommodated in a treatment head which is spatially separated from the pump laser;
• and
• a fiber-optic device being provided for transmitting laser radiation from the pump laser to the laser converter comprising a metal-holmium-fluoride crystal with an alkaline or alkaline-earth ion as metal ion with partial substitution of the holmium (Ho) ions by praseodymium (Pr) ions and further with partial substitution of the holmium (Ho) ions by ions of the rare earths ytterbium (Yb) or yttrium (Y) is provided as laser crystal in the laser converter, namely one of the following compounds:
• Me(Ho1-x-yPrxREy)F4, where Me is a metal ion of lithium (Li) or sodium (Na), RE is an ion of ytterbium (Yb) or yttrium (Y), F is a fluorine ion, with components of praseodymium of x=0.001 to 0.03 and with components of ytterbium (Yb) or yttrium (Y) of y=0.2 to 0.9, or
• Ba(Ho1-x-yPrxREy)2F8, where Ba is a barium ion, F is a fluorine ion, RE is an ion of ytterbium (Yb) or yttrium (Y), with components of praseodymium of x=0.0005 to 0.015, and with components of ytterbium (Yb) or yttrium (Y) of y=0.1 to 0.45.