A visible light laser system and operation for welding materials together. A blue laser system that forms essentially perfect welds for copper based materials. A blue laser system and operation for welding conductive elements, and in particular thin conductive elements, together for use in energy storage devices, such as battery packs.

A laser apparatus includes: a master oscillator for emitting a laser beam; an amplifier on an optical path of the laser beam; a beam splitter between the master oscillator and the amplifier for separating, from the optical path of the laser beam, at least part of a return beam traveling through the optical path of the laser beam in a direction opposite to a traveling direction of the laser beam; a focusing optical system for focusing the return beam separated from the optical path; and an optical sensor having a light receiving surface for the return beam for detecting information on power of the return beam entering the light receiving surface through the focusing optical system, the light receiving surface being arranged at a position different from a focusing position of the focusing optical system on the optical path of the return beam.

A laser apparatus includes: a master oscillator for emitting a laser beam; an amplifier on an optical path of the laser beam; a beam splitter between the master oscillator and the amplifier for separating, from the optical path of the laser beam, at least part of a return beam traveling through the optical path of the laser beam in a direction opposite to a traveling direction of the laser beam; a focusing optical system for focusing the return beam separated from the optical path; and an optical sensor having a light receiving surface for the return beam for detecting information on power of the return beam entering the light receiving surface through the focusing optical system, the light receiving surface being arranged at a position different from a focusing position of the focusing optical system on the optical path of the return beam.

A laser processing device for making a metrological scale includes a laser unit, a motion platform, and a control unit. The laser unit is configured to output a laser beam. The motion platform bears the laser unit. The control unit is electrically connected to the laser unit and the motion platform, to control the motion platform to move relative to the workpiece and trigger the laser unit to output the laser beam at a suitable location, so that the workpiece is processed with a plurality of scale lines.

A laser processing device for making a metrological scale includes a laser unit, a motion platform, and a control unit. The laser unit is configured to output a laser beam. The motion platform bears the laser unit. The control unit is electrically connected to the laser unit and the motion platform, to control the motion platform to move relative to the workpiece and trigger the laser unit to output the laser beam at a suitable location, so that the workpiece is processed with a plurality of scale lines.

A high-power fiber laser produces a compound output beam having a center beam and an annular beam. The center beam and the annular beam are independently adjustable in power and wavelength. The output beam is delivered from an output optical fiber having a center core and a concentric annular core. A fundamental beam generated by a seed laser is amplified by a fiber amplifier and partially converted to a second-harmonic beam by a second-harmonic generator. The residual fundamental beam and second-harmonic beam are separated, attenuated, and selectively coupled into the cores of the output optical fiber.

A method, medium, and system to obtain an assignment of one of a plurality of different additive manufacturing (AM) print parameter sets to each of a plurality of 3D volume elements forming a representation of the model of the part; define a plurality of groupings based on margin parameter values associated with the model of the part; assign a print parameter set to each grouping; automatically assign each of the plurality of print parameter sets to a laser of a multi-laser AM device; save a record of the determined print parameter sets to laser assignments; and transmit the record of the determined print parameter sets to laser assignments to an AM controller to control the multi-laser AM device to generate the part based on the model of the part and the determined print parameter sets to laser assignments, the generated part to be built in a single build.

A method, medium, and system to obtain an assignment of one of a plurality of different additive manufacturing (AM) print parameter sets to each of a plurality of 3D volume elements forming a representation of the model of the part; define a plurality of groupings based on margin parameter values associated with the model of the part; assign a print parameter set to each grouping; automatically assign each of the plurality of print parameter sets to a laser of a multi-laser AM device; save a record of the determined print parameter sets to laser assignments; and transmit the record of the determined print parameter sets to laser assignments to an AM controller to control the multi-laser AM device to generate the part based on the model of the part and the determined print parameter sets to laser assignments, the generated part to be built in a single build.

An aspect of the present invention makes it easier to increase a temperature of metal powder to a temperature at which a powder bed (PB) is sintered or melted. An irradiation device (13) includes: a galvano scanner (13a) which irradiates at least part of a powder bed (PB) with laser light; and a wavelength converting element (WCE) provided in an optical path of the laser light. The wavelength converting element (WCE) converts laser light inputted into the wavelength converting element to laser light containing harmonic wave light (HL) which has a shorter wavelength than the laser light inputted into the wavelength converting element.

A method of processing by controlling one or more beam characteristics of an optical beam may include: launching the optical beam into a first length of fiber having a first refractive-index profile (RIP); coupling the optical beam from the first length of fiber into a second length of fiber having a second RIP and one or more confinement regions; modifying the one or more beam characteristics of the optical beam in the first length of fiber, in the second length of fiber, or in the first and second lengths of fiber; confining the modified one or more beam characteristics of the optical beam within the one or more confinement regions of the second length of fiber; and/or generating an output beam, having the modified one or more beam characteristics of the optical beam, from the second length of fiber. The first RIP may differ from the second RIP.