Abstract: The disclosure relates to a laser beam aligning unit comprising an outer sleeve and an inner sleeve arranged inside the outer sleeve such that a laser beam may be guided through an inner chamber thereof in a direction of an area of material to be treated. A laser treatment device may comprise the laser beam aligning unit and/or a distribution device for distributing an ectoine solution.

Abstract: Device and method for lasering biological tissue. In a general aspect, the device for lasering a biological tissue may include a source configured to provide a pulsed laser beam, an outcoupler configured to couple the laser beam towards the tissue, and an outfeeder configured to feed a photosensitizer in a direction of the tissue where the outfeeder is connected to the outcoupler. In another general aspect, a method for lasering a biological tissue may include applying a photosensitizer towards the tissue, providing a pulsed laser beam, and lasering a site of the tissue with the pulsed laser beam where the laser beam is emitted with a temporal width at a half maximum range from about 1 ps to about 100 ps.

Abstract: A method for material processing and laser processing device for material processing. The laser machining device has a laser beam source to provide a pulsed processing laser beam, a laser beam aligning unit to output couple the laser beam in the direction toward a area of material to be machined, and an emission device to emit a photosensitizer in the direction toward a surrounding area of the area of the material to be machined, wherein the emission device is connected to the aligning unit.

Abstract: Method and laser processing device to process tissue. In a general aspect, the method to process tissue may include applying a photosensitizer into an area surrounding a region of the tissue to be processed, and irradiating the region of the tissue to be processed with the pulsed processing laser beam, the laser beam emitting laser pulses with a temporal full width at half maximum in a range between about 100 femtosecond and about 1 nanosecond. In another general aspect, the laser processing device to process tissue may include a laser radiation source to provide a pulsed processing laser beam providing emitting laser pulses, a laser beam decoupling unit to decouple the laser beam towards a region of the tissue to be processed, and an output device to output a photosensitizer in a direction of an area surrounding the region of the tissue to be processed, the output device being connected to the decoupling unit.

Abstract: Device and method for lasering biological tissue. In a general aspect, the device for lasering a biological tissue may include a source configured to provide a pulsed laser beam, an outcoupler configured to couple the laser beam towards the tissue, and an outfeeder configured to feed a photosensitizer in a direction of the tissue where the outfeeder is connected to the outcoupler. In another general aspect, a method for lasering a biological tissue may include applying a photosensitizer towards the tissue, providing a pulsed laser beam, and lasering a site of the tissue with the pulsed laser beam where the laser beam is emitted with a temporal width at a half maximum range from about 1 ps to about 100 ps.

Abstract: A method of laser machining biological tissue including the provision of a pulsed processing laser beam and the processing of tissue by radiation using the pulsed processing laser beam, wherein the processing laser beam has a wavelength of the laser pulses ranging between 700 nm and 1400 nm, a time duration of the laser pulses ranging between 5 ps and 100 ps, and an energy density of the laser pulses on the surface of the tissue ranging between 1.5 J/cm2 and 7.5 J/cm2.

Abstract: The present invention describes an optically end-pumped laser gain module, comprising a gain medium which is pumped by a light beam that has a larger size on the input face of the medium than on its output face.

Abstract: To optimise the transformation rate (efficiency) in the optical frequency conversion of laser beams of ultra-short light pulses in optically non-linear media such as a crystal (56), a double refracting crystal (54) is arranged in the beam path before the optically non-linear medium (56). The length of the double refracting crystal (54) is selected and the orientation of its optical crystal axis in relation to the propagation direction of the laser beams involved in the frequency conversion is set such that the change caused by the double refracting crystal (54) in the location, time and direction of incidence of the laser pulses (14) and (16) on the optically non-linear medium (56) and the resulting change in the spatial and temporal overlap of the laser pulses in the optically non-linear medium (56) for optical frequency conversion in the crystal (56) give a conversion efficiency which is higher than the conversion efficiency which would be achieved without the double refracting crystal (54).

Abstract: A device for the optical excitation of laser-active crystals with a diode laser (1) is disclosed. The diode laser (1) generates pump radiation (2), and the laser-active crystal (14) is arranged in a solid-state laser or solid-state laser amplifier. The laser-active crystal (14) has an axis (C) with strong absorption and an axis (A) with weak absorption. The pump radiation (2) from the diode laser (1) is substantially polarised linearly in a privileged polarisation direction. The device is configured in such a way that the pump radiation (2) is injected into the laser-active crystal (14) with a polarisation direction which is oriented parallel to the weak-absorption axis (A). The polarisation of the pump radiation in the vicinity of the laser-active crystal is oriented parallel relative to the weak-absorption axis.

Abstract: In a device to generate laser light, with a laser-active main resonator (2) and a coupled non-linear resonator (6), each of the two resonators (2, 6) being delimited by mirrors (8, 4; 4, 10), and one mirror (4) of the main resonator (2) being identical to a mirror (4) of the coupled non-linear resonator (6), it is provided that the non-linear resonator (6) is designed for a power loss less than 63% of the power which is coupled via the main resonator (2) and the mirror which delimits the coupled non-linear resonator (6), and the laser-active main resonator is designed so that in laser operation it has a threshold pump power which is less than one fifth, preferably less than one tenth, of the pump power which is used and using which this resonator is excited.