Abstract: The present disclosure relates to turning a workpiece with a laser beam coupled into a fluid jet, i.e., a fluid-jet guided laser beam. The disclosure respectively provides a method and an apparatus for machining a workpiece, wherein the machining comprises turning the workpiece. The method is carried out by the apparatus, which is configured to provide the fluid-jet guided laser beam. The method comprises turning the workpiece, wherein turning the workpiece comprises: rotating the workpiece around an axis of rotation during the machining; and providing the fluid-jet guided laser beam to a machined surface of the workpiece.

Abstract: The present disclosure relates to the field of Chemical Vapor Deposition (CVD) diamonds and their processing after fabrication. In particular, the present disclosures provides a method for coring and slicing a CVD diamond product, wherein the CVD diamond product comprises a CVD diamond and graphitized material covering several side-faces of the diamond. The method is carried out by an apparatus that provides a laser beam coupled into a fluid jet. The method comprises, for the coring, cutting the product with the laser beam to remove the graphitized material from the side-faces of the diamond. Further, the method comprises, for the slicing, cutting off one or more slices from the diamond with the laser beam.

Abstract: The invention relates to an apparatus 100 for machining a workpiece with a high-intensity laser beam 101, the apparatus 100 being configured to provide a pressurized fluid jet 102 and to couple the laser beam 101 into the fluid jet 102. The apparatus 100 comprises a detection unit 103 configured to receive and detect secondary radiation 104 generated by the laser beam 101 in the fluid jet 102. The detection unit 103 includes a sensing unit 105 configured to convert secondary radiation 104 into a detection signal 106. The apparatus 100 is configured to generate, with the detection unit 103, a plurality of detection signals 106 at a single position or at different positions along the fluid jet 102.

Abstract: The present invention provides an apparatus 100, 200, 300, 900 and a method 400 for machining a workpiece 101 with a laser beam 102. In particular, the apparatus 100, 200, 300 comprises a nozzle 103 for generating a pressurized fluid jet 104, and at least one optical element 105 configured to couple the laser beam 102 into the fluid jet 104. The apparatus 100, 200, 300 also includes a hermetic enclosure 106 surrounding the nozzle 103 and the at least one optical element 105. The hermetic enclosure 106 includes an upper part 107 provided with an interface unit 108, and a lower part 109 removably attached to the upper part 107 by means of the interface unit 108. The lower part 109 comprises an exit aperture 110 for outputting the fluid jet 104 towards the workpiece 101, wherein the exit aperture 110 and the fluid jet 104 are coaxially aligned.