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41.发明公开公开(公告)号：US20240146010A1
公开(公告)日：2024-05-02
申请号：US18408618
申请日：2024-01-10
申请人： TRUMPF Laser GmbH
IPC分类号： H01S3/00
CPC分类号： H01S3/0057 , H01S3/0014
摘要： A pulse modification apparatus includes at least one pulse stretcher for dispersive stretching of laser pulses and/or at least one pulse compressor for dispersive compression of the laser pulses, an actuator for setting a dispersion of the at least one pulse stretcher or a dispersion of the at least one pulse compressor by setting at least one manipulated variable, a controller for controlling the actuator based on a measurement signal, and an ambient sensor for detecting at least one ambient parameter as the measurement signal. The dispersion of the at least one pulse stretcher or the dispersion of the at least one pulse compressor is dependent on the at least one ambient parameter.
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公开(公告)号：US11955761B2
公开(公告)日：2024-04-09
申请号：US17521906
申请日：2021-11-09
申请人： TRUMPF Laser GmbH
发明人： Rainer Flaig , Andreas Enzmann , Florian Jansen
IPC分类号： H01S3/00
CPC分类号： H01S3/0007 , H01S3/0014 , H01S3/005
摘要： A beam shutter is for a laser beam. The beam shutter includes: a reflecting optical unit configured to deflect the laser beam; a holding arm, which is capable of being brought into a release position and a shut-off position and on which the reflecting optical unit is held; a sensor circuit with at least one sensor component arranged between the reflecting optical unit and the holding arm; and an evaluation device, which is configured to interact with the sensor circuit, at least in the shut-off position of the holding arm.
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公开(公告)号：US20240082953A1
公开(公告)日：2024-03-14
申请号：US18515340
申请日：2023-11-21
申请人： TRUMPF Laser GmbH
CPC分类号： B23K26/24 , B23K26/0876
摘要： A method for producing a bipolar plate includes providing a first plate element and a second plate element. The first plate element has at least one bead with a longitudinal extent. The method further includes forming a welded connection between the first plate element and the second plate element along the longitudinal extent by using a laser processing beam. The formation of the welded connection includes detecting a geometric feature of the at least one bead located in a transverse direction. The geometric feature is a deepest point or a point of defined depth of the at least one bead. The formation of the welded connection further includes readjusting the laser processing beam in the transverse direction to a position of the detected geometric feature, and welding the first plate element and the second plate element together at the position of the geometric feature.
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44.发明公开公开(公告)号：US20230384084A1
公开(公告)日：2023-11-30
申请号：US18448203
申请日：2023-08-11
申请人： TRUMPF Laser GmbH
发明人： Andreas Jahn , Martin Stambke
IPC分类号： G01B9/02091
CPC分类号： G01B9/02091
摘要： A method for determining an optimized parameter set having a plurality of measurement parameters to carry out a measurement is provided. The method includes: C) carrying out and storing n measurements of a measuring element, n being an integer greater than one. Each measurement has one parameter set. Each measurement has a multiplicity of measuring points. The method further includes: D) evaluating the n measurements with an evaluation function and storing the evaluation, E) generating new parameter sets from the parameter sets used in step C), F) carrying out steps C) to E) multiple times, and J) outputting at least one parameter set that is evaluated as good.
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45.发明公开公开(公告)号：US20230361523A1
公开(公告)日：2023-11-09
申请号：US18337445
申请日：2023-06-20
申请人： TRUMPF Laser GmbH
发明人： Florian Graf , Aleksander Budnicki
CPC分类号： H01S3/06725 , H01S3/0675 , H01S3/06791 , H01S3/08013 , H01S3/094003 , H01S3/094076 , H01S3/1603
摘要： A passive mode-coupled fiber oscillator includes a bidirectional loop, a unidirectional loop, and a 3x3 coupler. The bidirectional loop and the unidirectional loop are coupled to one another via the 3x3 coupler. The bidirectional loop includes a first amplification fiber that is doped using at least one element selected from the group consisting of ytterbium, neodymium, erbium, thulium, and holmium. The fiber oscillator further includes a dispersion compensation element. The fiber oscillator has an anomalous dispersion overall.
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公开(公告)号：US11735884B2
公开(公告)日：2023-08-22
申请号：US16931558
申请日：2020-07-17
申请人： TRUMPF LASER GMBH
发明人： Rainer Flaig , Stefan Rapp , Fred Stier
CPC分类号： H01S3/10015 , H01S3/10046 , H01S3/1302 , H01S3/2391
摘要： Methods and laser systems are disclosed for generating amplified output laser pulses with individually specified pulse energies and/or pulse shapes at individually specified time points at an output by providing a first pulse sequence of input laser pulses with a same pulse energy and a same temporal pulse distance smaller than a temporal pulse distance between adjacent output laser pulses, selecting input laser pulses arriving at the output at or close to the specified time points to form a second pulse sequence of input laser pulses, coupling at least one sacrificial laser pulse (energy balance or temporal balance) into the second pulse sequence, amplifying the second pulse sequence of input laser pulses with the sacrificial laser pulse, and coupling out the amplified sacrificial laser pulse from the amplified second pulse sequence upstream of the output to obtain the amplified output laser pulses.
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公开(公告)号：US20230170660A1
公开(公告)日：2023-06-01
申请号：US18161904
申请日：2023-01-31
申请人： TRUMPF Laser GmbH
发明人： Jonathan Brons , Raphael Scelle , Dominik Bauer , Aleksander Budnicki , Alexander Killi , Dirk Sutter , Peter Kroetz
CPC分类号： H01S3/0057 , G02F1/3511 , G02F1/3503
摘要： A laser system for nonlinear pulse compression includes a laser source configured to generate laser pulses with a pulse energy of at least 50 mJ, a spectral broadening device for spectrally broadening the high-energy laser pulses using self-phase modulation, and a compression device including a grating compressor having at least two diffraction gratings and configured to compress the spectrally broadened high-energy laser pulses. The laser system is configured to generate a pulse duration of the high-energy laser pulses of less than 100 fs.
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公开(公告)号：US11573379B2
公开(公告)日：2023-02-07
申请号：US17329332
申请日：2021-05-25
申请人： TRUMPF LASER GMBH
发明人： Stefan Fuchs , Dominik Bauer , Michael Scharun , Helge Höck , Stefan Baumbach , Manuel Schindler , Maike Proßotowicz
摘要： Methods, devices, and systems for welding optical fibers and perforated elements by pulsed laser beam are provided. In one aspect, a method includes focusing a pulsed laser beam onto a region of a joining surface formed by an outer circumference of an optical fiber and an inner circumference of a hole of a perforated element, a beam direction of the pulsed laser beam running in an axial direction of the joining surface, and moving a laser focus of the pulsed laser beam in the region axially in or counter to the beam direction to produce at least one weld seam in the region. The optical fiber and the perforated element are locally melted in the region by the pulsed laser beam focused into a material of the optical fiber and a material of the perforated element and are thereby welded to one another.
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公开(公告)号：US20220290973A1
公开(公告)日：2022-09-15
申请号：US17829379
申请日：2022-06-01
申请人： TRUMPF Laser GmbH
摘要： A method for distance measurement includes: (a) measuring a focus distance between a z-focus position of a processing laser beam and a reference surface, and measuring a reference distance between a reference arm mirror of a coherence tomography apparatus and the reference surface using a measurement beam. The processing laser beam is directed onto the reference surface via a laser processing optical unit. The measurement beam is directed onto a same point of the reference surface as the processing beam or onto a point of the reference surface next to an impingement point of the processing beam. The method further includes (b) measuring a workpiece distance between the reference arm mirror and a workpiece surface using the measurement beam directed onto the workpiece surface, and (c) determining the distance between workpiece surface and the z-focus position based on the reference distance and the workpiece distance and the focus distance.
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公开(公告)号：US20220029374A1
公开(公告)日：2022-01-27
申请号：US17497990
申请日：2021-10-11
申请人： TRUMPF Laser GmbH
摘要： A method generates laser pulses by varying a Q-factor in a resonator. The method includes generating the laser pulses by controlling an optical modulator with a control signal for switching over between a first operating state of the optical modulator for generating a first Q-factor in the resonator and a second operating state of the optical modulator for generating a second Q-factor in the resonator. The second Q-factor is different than the first Q-factor. In order to generate a sequence of the laser pulses in which first laser pulses alternate with second laser pulses different than the first laser pulses, the optical modulator is controlled differently in each case alternately with the control signal for generating a respective first laser pulse, of the first laser pulses, and a respective second laser pulse, of the second laser pulses.
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