Abstract: For lightening or eradicating pigments in human skin, a first conditioning laser optical energy having first optical parameters selected to obtain an ablative effect on the epidermal layer of human skin is provided. A target area of the human skin is conditioned by directing the first conditioning laser optical energy onto the target area and forming in an epidermal layer of the target area discrete pressure and gas release ducts across the target area. A second treatment laser optical energy is provided that has second optical parameters selected to obtain a lightening or eradicating effect on the pigments located within the human skin and to substantially avoid damaging the epidermal layer of the human skin. The second treatment laser optical energy is directed onto the target area subsequent to conditioning, and the pigments within the human skin are lightenmed or eradicated by the second treatment laser optical energy.

Abstract: In a method for operating a laser system for bleaching teeth, a water-containing bleaching agent applied onto teeth is heated by a laser beam, wherein the laser beam has a wavelength in a range of 2.6 ?m, inclusive, to 3.1 ?m, inclusive, or in a range of 9.0 ?m, inclusive, to 11.0 ?m, inclusive. The laser system is operated in pulse mode with individual pulses of the laser beam, wherein the individual pulses each have a fluence that is below a vaporization threshold fluence of the bleaching agent.

Abstract: The invention relates to laser system with a laser source and an articulated arm. The articulated arm has an optical arrangement for guiding a laser beam from the laser source along an optical path in the articulated arm to a target location. Within the optical path at least one crossing area (focus or focal point) of the laser beam is provided. The optical arrangement has at least one optical cell with an input window and an output window for passing the laser beam therethrough, wherein the crossing area is positioned within the optical cell. The optical cell has a gas fill with an energy threshold for ionization that is increased in comparison to that of ambient air.

Abstract: In a method for operating a laser system for bleaching teeth, a water-containing bleaching agent applied onto teeth is heated by a laser beam, wherein the laser beam has a wavelength in a range of 2.6 ?m, inclusive, to 3.1 ?m, inclusive, or in a range of 9.0 ?m, inclusive, to 11.0 ?m, inclusive. The laser system is operated in pulse mode with individual pulses of the laser beam, wherein the individual pulses each have a fluence that is below a vaporization threshold fluence of the bleaching agent.

Abstract: The invention relates to laser system with a laser source and an articulated arm. The articulated arm has an optical arrangement for guiding a laser beam from the laser source along an optical path in the articulated arm to a target location. Within the optical path at least one crossing area (focus or focal point) of the laser beam is provided. The optical arrangement has at least one optical cell with an input window and an output window for passing the laser beam therethrough, wherein the crossing area is positioned within the optical cell. The optical cell has a gas fill with an energy threshold for ionization that is increased in comparison to that of ambient air.