Abstract: A diode laser apparatus includes a plurality of laser bars, each laser bar having an emission direction and a beam path. The laser bars are disposed along an arc, the emission directions of the laser bars are directed toward an inside of the arc, and a slow-axis direction of each laser bar is oriented along the arc.

Abstract: In an optical fibre (1) for the transmission of high-power laser radiation, with a fibre core (2), with an inner fibre cladding (3) surrounding the fibre core (2) for carrying the laser radiation in the fibre core (2), with a first outer fibre cladding (4) surrounding the inner fibre cladding (3), which has a smaller refractive index than the inner fibre cladding (3) as a result of longitudinally aligned air-filled capillaries (5), and with a second outer fibre cladding (6) surrounding the first outer fibre cladding (4), wherein the first outer fibre cladding (4) has a capillary-free longitudinal section (8), the second outer fibre cladding (6) has according to the invention scattering centres (7) at least in the region of the capillary-free longitudinal section (8) for scattering the laser radiation emerging from the inner fibre cladding (3) along the capillary-free longitudinal section (8).

Abstract: The aim of the invention is to obtain a laser system with the highest possible power that operates as stably as possible. This object is achieved in the case of a laser system by the laser radiation field passing through at least two laser-active solid bodies of identical material disposed one following the other in the direction of its beam axis, by the pumping radiation guide being formed in such a way that it feeds into each of the solid bodies the first partial radiation field via one end face and the second partial radiation field via the other end face and by the pumping radiation guide being formed in such a way that a pumping power fed into each of the at least two solid bodies by the two partial radiation fields can be adjusted in such a way that the effects on the laser radiation field of thermal lenses produced by the pumping power in each of the at least two solid bodies are substantially identical.

Abstract: An apparatus for optically pumping a laser-active solid body with pumping light coupled into the solid body through an end surface of the solid body is disclosed. The apparatus includes a laser-active solid body including an end surface though which pumping light is coupled into the solid body and a lateral surface through which pumping light exits the solid body, a reflector surrounding the laser-active solid body at a distance from the lateral surface of the solid body for reflecting light that exists the solid body back towards the solid body, and a surface for diffusing light that is coupled into the solid body through the end surface of the solid body and that exits the solid body through the lateral surface. The surface is selected from the group consisting of the lateral surface and a surface of the reflector.

Abstract: The aim of the invention is to obtain a laser system with the highest possible power that operates as stably as possible. This object is achieved in the case of a laser system by the laser radiation field passing through at least two laser-active solid bodies of identical material disposed one following the other in the direction of its beam axis, by the pumping radiation guide being formed in such a way that it feeds into each of the solid bodies the first partial radiation field via one end face and the second partial radiation field via the other end face and by the pumping radiation guide being formed in such a way that a pumping power fed into each of the at least two solid bodies by the two partial radiation fields can be adjusted in such a way that the effects on the laser radiation field of thermal lenses produced by the pumping power in each of the at least two solid bodies are substantially identical.

Abstract: A high-power fiber laser amplifier with a laser wavelength of about 1060 to 1100 nm and an average laser power of more than about 500 W and an almost diffraction-limited beam quality (M2<1.5) comprises a double-clad laser fiber that has a separate, laser-active fiber core with an outer diameter of at least 20 ?m and a pump core that surrounds the fiber core and has an outer diameter of at least 50 ?m, and ytterbium-doped solid state laser that emits pump light with a wavelength of approximately 1030 nm, a beam quality of M2<of approximately 30 and a laser power of at least approximately 600 watts, for pumping the double-clad laser fiber.

Abstract: A beam shaping optical arrangement combines three incoming laser beams that are mutually laterally offset in two orthogonal directions (X and Y), including an incoming first central laser beam and second and third incoming beams laterally offset in the X direction on either side of the central beam, into one outgoing combined laser beam. The arrangement includes two lateral displacement optical units though which the laterally offset incoming beams are transmitted and that laterally displace the two laterally offset incoming beams along the X direction towards the incoming central beam but which do not laterally offset the incoming central beam.

Abstract: A diode laser apparatus includes a plurality of laser bars, each laser bar having an emission direction and a beam path. The laser bars are disposed along an arc, the emission directions of the laser bars are directed toward an inside of the arc, and a slow-axis direction of each laser bar is oriented along the arc.

Abstract: A beam shaping optical arrangement combines three incoming laser beams that are mutually laterally offset in two orthogonal directions (X and Y), including an incoming first central laser beam and second and third incoming beams laterally offset in the X direction on either side of the central beam, into one outgoing combined laser beam. The arrangement includes two lateral displacement optical units though which the laterally offset incoming beams are transmitted and that laterally displace the two laterally offset incoming beams along the X direction towards the incoming central beam but which do not laterally offset the incoming central beam.

Abstract: An apparatus for optically pumping a laser-active solid body with pumping light coupled into the solid body through an end surface of the solid body is disclosed. The apparatus includes a laser-active solid body including an end surface though which pumping light is coupled into the solid body and a lateral surface through which pumping light exits the solid body, a reflector surrounding the laser-active solid body at a distance from the lateral surface of the solid body for reflecting light that exists the solid body back towards the solid body, and a surface for diffusing light that is coupled into the solid body through the end surface of the solid body and that exits the solid body through the lateral surface. The surface is selected from the group consisting of the lateral surface and a surface of the reflector.

Abstract: In order to improve a laser amplifying system comprising a solid-state member having a laser-active medium, a radiation field system determined by an optical guide means for the radiation field and an actively switchable, optical switching element arranged in the radiation field system for influencing the losses in the radiation field system in such a manner that this is suitable for low-amplification laser-active media, it is suggested that the solid-state member be designed like a thin plate, the radiation field system comprise an incoming branch and an outgoing branch which are coupled to one another, on the one hand, and between which, on the other hand, an amplifying radiation field is provided which is formed from a plurality of intermediate branches which extend between two optical beam reversing elements and, for their part, all penetrate the solid-state member in a direction transverse to its flat sides and within an active volume area, and that the active volume area have in directions transverse to

Abstract: The invention relates to an optical modulation device for coupling an entering radiation field (12), with which an incident radiation field (40) is divided into a transmitted branch (40T) and a diffracted branch (40B) by means of a first acousto-optical modulation and a diffracted and a transmitted branch are respectively generated by means of a second acousto-optical modulation so that the transmitted branch (40BUT) resulting from the deflected diffracted branch (40BU) and the diffracted branch (40TUB) resulting from the deflected transmitted branch (40TU) propagate in approximately the same direction and form a first radiation field (46) as a result of essentially constructive interference and, in addition, the transmitted branch (40TUT) resulting from the deflected transmitted branch (40TU) and the diffracted branch (40BUB) resulting from the deflected diffracted branch (40BU) propagate in the same direction and form a second radiation field (48) as a result of essentially destructive interference.

Abstract: In order to improve a laser amplifying system comprising a solid-state member having a laser-active medium, a radiation field system determined by an optical guide means for the radiation field and an actively switchable, optical switching element arranged in the radiation field system for influencing the losses in the radiation field system in such a manner that this is suitable for low-amplification laser-active media, it is suggested that the solid-state member be designed like a thin plate, the radiation field system comprise an incoming branch and an outgoing branch which are coupled to one another, on the one hand, and between which, on the other hand, an amplifying radiation field is provided which is formed from a plurality of intermediate branches which extend between two optical beam reversing elements and, for their part, all penetrate the solid-state member in a direction transverse to its flat sides and within an active volume area, and that the active volume area have in directions transverse to

Abstract: The invention relates to an optical modulation device for coupling an entering radiation field (12), with which an incident radiation field (40) is divided into a transmitted branch (40T) and a diffracted branch (40B) by means of a first acousto-optical modulation and a diffracted and a transmitted branch are respectively generated by means of a second acousto-optical modulation so that the transmitted branch (40BUT) resulting from the deflected diffracted branch (40BU) and the diffracted branch (40TUB) resulting from the deflected transmitted branch (40TU) propagate in approximately the same direction and form a first radiation field (46) as a result of essentially constructive interference and, in addition, the transmitted branch (40TUT) resulting from the deflected transmitted branch (40TU) and the diffracted branch (40BUB) resulting from the deflected diffracted branch (40BU) propagate in the same direction and form a second radiation field (48) as a result of essentially destructive interference.