Patent ID: 9444226
Filing Date: 2016-09-13
CPC Classification: G02B,H01S

Claim Text:
1. A diode laser comprising: a laser diode arrangement having a central plane with a plurality of laser bars, wherein each of the plurality of laser bars are disposed on a front side of a support and has a plurality of emitters generating a plurality of laser beams and wherein some of the plurality of laser bars are arranged offset with respect to one another in a first axial direction corresponding to a slow axis of the plurality of laser beams, wherein the plurality of laser bars with the support are provided offset to one another in a stacked manner in at least a first stack and a second stack to form the laser diode arrangement, each stack in a second axial direction corresponding to a fast axis direction of the plurality of laser beams and are oriented perpendicular to the first axial direction, the laser diode arrangement comprising fast axis collimators, at least one of the fast axis collimators is assigned to each of the plurality of laser bars disposed parallel to one another, and the diode laser further comprising an optical arrangement for forming laser beam bundles comprised of the plurality of laser beams generated by the plurality of emitters, wherein the optical arrangement comprises at least one fast axis plate fan arrangement for fanning out a laser beam bundle in the fast axis direction and a slow axis plate fan arrangement following the fast axis plate fan arrangement in a beam path for combining a fanned-out laser beam bundle in the slow axis direction, wherein the fast axis plate fan arrangement comprises at least a first fast axis plate fan and a second fast axis plate fan arranged parallel to one another and at a distance from one another in the direction of the slow axis direction of laser radiation, wherein the first fast axis plate fan and the second fast axis plate fan each comprises a plurality of plates perpendicular to the slow axis direction and are turned around the slow axis direction with respect to one another by an angular magnitude so that at least the first fast axis plate fan and the second fast axis plate fan form separate fanned-out laser beam bundles which are separate for each stack and offset relative to one another in the fast axis direction and which are combined in the slow axis direction by the slow axis plate fan arrangement to form a combined laser beam bundle comprising the plurality of laser beams of the separate fanned out laser beam bundles, wherein the slow axis plate fan arrangement consists of a plurality of plates made of light-conducting material, wherein each of the plurality of plates is in turn formed with a first flat plate edge side and a second flat plate edge side oriented perpendicular to plate surfaces sides and parallel to each other, the first flat plate edge side forming an inlet side for laser radiation and the second flat plate edge side forming an outlet side for the laser radiation, each of the plurality of plates also includes a third edge side and a fourth edge side each connecting the first flat plate edge side and the second flat plate edge side, the plurality of plates having an approximately trapezoidal section and the first flat plate edge side having a shorter length than the second flat plate edge side and the plurality of plates are twisted with respect to one other in a fan-like manner about an axis oriented in the fast axis direction so that planes of the first and second plate edges of neighboring plates are in turn offset with respect to one another by an angular offset less than 90°.