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High-power lasers are used in many industries. There are several key laser technologies employed for materials processing and each laser type, wavelength, and architecture has its advantages and key applications where it excels. Delivering the beam to the work piece, and monitoring both the beam characteristics, as well as the process, are important enablers for any given application.

This conference will explore high-power lasers, how their radiation is shaped and delivered to the work piece, how the process is monitored, and, in general, their use in the world of industrial materials processing. Preference will be given to "real world" industry-related submissions.

Papers are solicited on a wide range of topics related to the conference title, including but not limited to the following:

JOINT SESSIONS with LA203 Laser Resonators, Microresonators, and Beam Control (Beam shaping components) and LA401 (Laser 3D-Manufacturing) may be held to accommodate presentations that cover the aspects of the respective conferences.;
In progress – view active session
Conference 11994

High-Power Laser Materials Processing: Applications, Diagnostics, and Systems XI

26 - 27 January 2022 | Room 214 (Level 2 South)
View Session ∨
  • LASE Plenary and Hot Topics
  • 1: Beam Shaping
  • 2: Process Control and Simulation
  • 3: Applications
  • 4: Multi Wavelength, Multi Spot

Check the conference schedule frequently for updates | Presentation times are subject to change

  • Presenters: Please inform SPIE of any changes by 7 January
  • Presentation times will be finalized on 19 January
LASE Plenary and Hot Topics
24 January 2022 • 3:30 PM - 6:00 PM PST | Room 207/215 (Level 2 South)
3:30 PM - 3:35 PM: Welcome and Opening Remarks
Craig B. Arnold, Princeton Univ. (United States)

3:35 PM - 3:40 PM: Special Announcement from SPIE
Author(s): Tammy Ma, Lawrence Livermore National Lab. (United States)
24 January 2022 • 3:45 PM - 4:25 PM PST | Room 207/215 (Level 2 South)
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This past August, a record-breaking shot with 1.3 megajoules of fusion yield was achieved on the National Ignition Facility (NIF) at Lawrence Livermore National Laboratory. This experimental result, decades in the making, is a significant breakthrough for laser-driven inertial fusion. This talk will review the experimental results, the photonics advancements and many more technologies that made this breakthrough possible, and the implications for future research. Furthermore, these recent game-changing results on the NIF now lay the groundwork to explore laser inertial fusion as a path for clean energy and energy security.
Author(s): Clara J. Saraceno, Ruhr-Univ. Bochum (Germany)
24 January 2022 • 4:20 PM - 4:40 PM PST | Room 207/215 (Level 2 South)
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High-power ultrafast laser technology has seen extremely fast-paced progress in the last decades, giving momentum to many fields. Nowadays, laser systems delivering hundreds of watts to kilowatts of average power with pulse energies ranging from microjoules to hundreds of millijoules become increasingly available, based on fiber, slabs and disk laser geometries. In this talk, we will discuss a recent hot topic enabled by progress in high-power ultrafast laser sources, that is the demonstration of table-top sources of few-cycle THz radiation with extremely high average power – reaching a performance level which was so far restricted to accelerator facilities. We will discuss new possibilities opened by these unique sources both in research and applied fields.
Author(s): Michael Kues, Leibniz Univ. Hannover (Germany)
24 January 2022 • 4:40 PM - 5:20 PM PST | Room 207/215 (Level 2 South)
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Today’s quantum technology relies on the realization of large-scale non-classical systems in practical formats to enable quantum-accelerated computing, secure communications and enhanced sensing. Optical on-chip quantum frequency combs, characterized by many equidistantly spaced frequency modes, allow the storage of large amounts of quantum information. The combination with control techniques, using accessible state-of-the-art telecommunications infrastructure, can constitute a powerful frequency-domain quantum circuit with new functionalities and represents an approach towards realizing practical large-scale controllable quantum systems. In this presentation, we will review approaches for the efficient realization of quantum frequency combs in on-chip waveguide structures and micro-resonators. We will show their applicability for the realization of quantum systems with considerably enhanced complexity, particularly generating and manipulating on-chip multi-photon and high-dimensional quantum states as well as discrete high-dimensional cluster states, laying at the basis of measurement based-quantum computing. Building on this, the realization of frequency-domain Hong-Ou-Mandel interference of independent photons, fundamental to quantum information processing, as well as an outlook on frequency-domain circuits will be discussed.
Author(s): Jennifer A. Dionne, Stanford Univ. (United States)
24 January 2022 • 5:20 PM - 5:40 PM PST | Room 207/215 (Level 2 South)
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We present a new platform for sensitive molecular detection and control spanning 1) multiplexed genetic and proteomic screening, 2) single-cellular bacterial identification and drug susceptibility testing, and 3) chiral molecular synthesis and separation, based on high-quality-factor phase gradient metasurfaces. The high-quality factor of our metasurfaces produces a large amplification of the electromagnetic field, increasing the response to targeted binding of biomarkers. Simultaneously, the optical signal is beam-steered for multiplexed detection. We develop these metasurfaces for a new respiratory panel of SARS-CoV-2, RSV, and influenza; Raman-based identification and antibiotic susceptibility testing of pathogens; and sensitive identification and purification of chiral molecules including amino acids and small-molecule pharmaceuticals and agrochemicals.
Author(s): Andrés Fabián Lasagni, TU Dresden (Germany), Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS (Germany)
24 January 2022 • 5:40 PM - 6:00 PM PST | Room 207/215 (Level 2 South)
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Laser-microtextured surfaces have gained an increasing interest due to their enormous spectrum of applications and industrial scalability. In this frame, several research studies have demonstrated how laser-based fabrication methods can be used to produce functional surfaces. Furthermore, it has been demonstrated is many cases, that the combination of structures with feature sizes in different ranges (e.g., microelements decorated with nanostructures) can not only further enhanced specific functions but also to provide surfaces with several functionalities. In this context, this talk shows how Direct Laser Interference Patterning (DLIP), Direct Laser Writing (DLW) and Laser Induced Periodic Surface Structures (LIPSS) can be combined, reaching advanced functionalities on technological relevant materials.
Session 1: Beam Shaping
26 January 2022 • 1:40 PM - 3:00 PM PST | Room 214 (Level 2 South)
Session Chair: Markus Kogel-Hollacher, Precitec GmbH & Co. KG (Germany)
Author(s): Evangelos Papastathopoulos, TRUMPF Laser GmbH (Germany); Oliver Bocksrocker, Kai Fiechtner, TRUMPF Laser- und Systemtechnik GmbH (Germany); Sebastian Pricking, Rainer Flaig, Otto Effinger, TRUMPF Laser GmbH (Germany); Patrick Haug, Mauritz Moeller, TRUMPF Laser- und Systemtechnik GmbH (Germany); Tina Gottwald, Sven-Silvius Schad, Alexander Killi, TRUMPF Laser GmbH (Germany); Tracey Ryba, TRUMPF Inc. (United States)
26 January 2022 • 1:40 PM - 2:00 PM PST | Room 214 (Level 2 South)
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In the present paper we present advances on BrightLine Weld technology addressing following three topics: A) the novel implementation of beam shaping of CW high power laser in the visible wavelength range. Due to the higher absorption in this wavelength range, applications related to welding of copper, copper alloys and gold profit from this modality. We demonstrate thereby the increase of process window in welding of copper with a 3kW laser power at wavelength of 515nm, B) the combination of BrightLine Weld with multi-spot technology for welding of casted aluminum parts. With the presented strategy gas-tight welding of the aluminum alloys for parts like casted power electronics housings, heat exchangers and extrusion profiles is enabled. C) advantages that arise by dynamically changing the split-ratio of the laser power between core and ring during the welding process while utilizing the full available power of the laser. Thereby dynamic beam shaping reduces the process time and increases the quality at the same time. We demonstrate how a fast process like welding of copper hairpin with an NIR high-power laser benefits from this modality.
Author(s): Evangelos Papastathopoulos, Annette Pricking, Elke Kaiser, Reiner Bruestle, Christoph Tillkorn, Tina Gottwald, Bernd Metzger, Sven-Silvius Schad, Alexander Killi, TRUMPF Laser GmbH (Germany); Andrey Andreev, TRUMPF Laser- und Systemtechnik GmbH (Germany); Tracey Ryba, TRUMPF Inc. (United States)
26 January 2022 • 2:00 PM - 2:20 PM PST | Room 214 (Level 2 South)
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We report on a new generation of laser scanners and their utilization with a 24 kW CW laser at BPP 4 mm*mrad equipped with BrightLine Weld beam shaping functionality. Herewith, excellent weld seam quality, large welding depth, high welding speed and a large working distance are achieved. Those advantages are demonstrated with application results involving keyhole welding of copper.
Author(s): Eveline N. Reinheimer, Rudolf Weber, Thomas Graf, Univ. Stuttgart (Germany)
26 January 2022 • 2:20 PM - 2:40 PM PST | Room 214 (Level 2 South)
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At high feed rates, the laser beam welding process is very efficient and stable, resulting in high weld seam quality. However, at a certain feed rate, the weld seam begins to suffer from undercuts, and, when further increasing the feed rate in addition humps appear. It is known that the increase of the feed rate leads to an elongation of the capillary opposite to the feed direction. This has a significant influence on the meltflow and therefore on the formation of undercuts and humps. In the present work, the geometry of the capillary was studied as a function of the feed rate by means of X-Ray imaging during welding. It was found that if a critical feed rate was exceeded, the capillary geometry switched from a U-shape to a wedge-shape. It was seen, that the wedge-shaped capillary was directly related to the appearance of undercuts. It was also found that a decrease of the spot diameter leads to an increased critical feed rate for the formation of a wedge-shaped capillary.
Author(s): Matthieu Meunier, Gwenn Pallier, CAILabs (France); Jannik Lind, Precitec GmbH & Co. KG (Germany); Avinash Kumar, CAILabs (France); Markus Kogel-Hollacher, Precitec GmbH & Co. KG (Germany); Pu Jian, Guillaume Labroille, CAILabs (France)
26 January 2022 • 2:40 PM - 3:00 PM PST | Room 214 (Level 2 South)
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Laser cutting process is a very broad application requesting a high beam quality. Optimizing the beam shape is a promising solution to the challenge of cutting thicker parts while maintaining a sufficient cutting speed. We describe here a beam shaper compatible with industry standard equipment handling up to 16kW average power delivering an optimized non-symmetric shape. The different shapes are examined by means of online high-speed X-ray images, enabling to reconstruct the cutting front and to calculate the absorbed irradiance on the processed sample. This allows to compare the results with conventionally processed samples.
Coffee Break 3:00 PM - 3:30 PM
Session 2: Process Control and Simulation
26 January 2022 • 3:30 PM - 5:10 PM PST | Room 214 (Level 2 South)
Session Chair: Klaus R. Kleine, Coherent, Inc. (United States)
Author(s): Markus Kogel-Hollacher, Precitec GmbH & Co. KG (Germany); Thomas Nicolay, Precitec Optronik GmbH (Germany)
26 January 2022 • 3:30 PM - 3:50 PM PST | Room 214 (Level 2 South)
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It becomes clearer and clearer that there is more than a gradual transition in automotive industry, especially when it comes to the future propulsion systems. Whether we talk about e-mobility or hydrogen drive, laser and photonics industry take the chance to transform manufacturing processes, convince decision makes on the undoubted advantages of photonic tools in the relevant production chains. As most of the applications e.g. in e-mobility start from scratch one can directly use the most profitable manufacturing tools. There is no need to transform an already existing process from the “pre laser age” into modern times. This presentation reviews some of the applications in battery production from the perspective of a supplier of sensor technology and processing tools,.The main focus will concentrate on laser welding as here process monitoring and control plays an important role, laser marking, drilling, surface processing will not be part of the deliberations
Author(s): Richard Staehr, Matthias Henzler, Verena Wippo, Peter Jaeschke, Stefan Kaierle, Laser Zentrum Hannover e.V. (Germany); Ludger Overmeyer, Leibniz Univ. Hannover (Germany)
26 January 2022 • 3:50 PM - 4:10 PM PST | Room 214 (Level 2 South)
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In the aviation industry, noise reduction plays an important role for environmental protection. For this purpose, sound-absorbing acoustic liners are used which consist of a sandwich structure with one perforated CFRP skin layer. For manufacturing these CFRP skin layers, laser drilling offers specific benefits, but when it comes to large-scale applications further process improvements are necessary. In this investigation, a process control method based on thermography is presented and evaluated. The control mechanism uses the temperature course within the drilling area to decide whether the process can be terminated in order to avoid time losses and unnecessary heat input.
Author(s): Alexander V. Laskin, AdlOptica Optical Systems GmbH (Germany); Joerg Volpp, Lulea Univ. of Technology (Sweden)
26 January 2022 • 4:10 PM - 4:30 PM PST | Room 214 (Level 2 South)
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Performance and stability of welding, 3D-printing and other laser technologies depend on control of thermal lensing induced by non-uniform (gradient) heating: focus shift and aberration leading to change in the spot size and profile. Analysis of geometrical surface deformation and material transformation into a gradient medium allows the quantitative estimation of the focus shift and aberration, formulating optimal relationship between the material physical properties for mutual compensation of thermo-optical effects induced by the thermal expansion and the refractive index change – athermalization condition. Optimal optical materials: athermal crystalline Quartz and specialty glasses, Sapphire with high thermal conductivity. Experimental data confirm the theoretical conclusions and effectiveness of the suggested approach.
Author(s): Jannik Lind, Institut für Strahlwerkzeuge, Univ. Stuttgart (Germany), Precitec GmbH & Co. KG. (Germany); Christian Hagenlocher, Institut für Strahlwerkzeuge, Univ. Stuttgart (Germany); David Blazquez-Sanchez, Precitec GmbH & Co. KG (Germany); Rudolf Weber, Thomas Graf, Institut für Strahlwerkzeuge, Univ. Stuttgart (Germany)
26 January 2022 • 4:30 PM - 4:50 PM PST | Room 214 (Level 2 South)
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The generation of a low surface roughness of the cut edge during laser beam cutting is a challenge, especially when cutting thick metal sheets. The striations, which determine the surface roughness are caused by the local melt flow inside the cutting kerf. This melt flow was analysed with a high-speed X-ray imaging system that recorded the cutting process at a frame rate of 1000 Hz. In the talk the influence of cutting parameters on the geometry of the cutting kerf, on the melt flow direction and the resulting striation formation will be discussed.
Author(s): Christian Heinigk, RWTH Aachen Univ. (Germany); Thilo Barthels, Wolfgang Schulz, Markus Nießen, Fraunhofer-Institut für Lasertechnik ILT (Germany)
26 January 2022 • 4:50 PM - 5:10 PM PST | Room 214 (Level 2 South)
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The manufacturing requirements of Fine Metal Masks are high precision in terms of the hole geometry, and high productivity to produce the required amount. To achieve both objectives, high-power Ultra Short Pulse lasers combined with multi-beam scanners can be utilized. During production, the multi-beam scanners deposit a lot of heat in the metal foil which can ultimately yield temperature-induced distortions. In order to understand and finally avoid such distortions, a process simulation is sought. In a preceding study, the structuring of a single hole (the micro-scale) has been investigated, but due to the large differences in the time and spatial scales involved, it is not feasible to simulate the production of a whole part (the macro-scale). Within this treatise, a multi-scale simulation is described, taken into account the necessary information from the micro-scale to describe temperature-induced distortions on the macro-scale.
Session 3: Applications
27 January 2022 • 8:30 AM - 10:30 AM PST | Room 214 (Level 2 South)
Session Chair: Verena Wippo, Laser Zentrum Hannover e.V. (Germany)
Author(s): Simon Hirt, Verena Wippo, Laser Zentrum Hannover e.V. (Germany); Markus Geiger, Faserinstitut Bremen e.V. (Germany); Peter Jaeschke, Stefan Kaierle, Laser Zentrum Hannover e.V. (Germany); Ludger Overmeyer, Leibniz Univ. Hannover (Germany)
27 January 2022 • 8:30 AM - 8:50 AM PST | Room 214 (Level 2 South)
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In the lightweight industry, carbon fiber reinforced plastics (CFRP) are used as a standard material. Due to the amount of CFRP components used, cost-efficient repair methods are required. The Laser Zentrum Hannover e.V. is developing such a laser based repair process for CFRP with PA6 matrix material. For the repair, a laser-based ablation process, to remove the damaged area will be developed. To refill the scarf with a patch, a laser-based welding process will be developed. For the analysis of each process, samples were made and tested in order to determine their quality.
Author(s): Nikita Levichev, Alberto Tomás García, Joost R. Duflou, KU Leuven (Belgium)
27 January 2022 • 8:50 AM - 9:10 AM PST | Room 214 (Level 2 South)
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Process visualization is typically used to explore different phenomena involved in laser material processing. The interaction between the laser beam and the workpiece material causes different sources of emission during the laser cutting process, as a result of material heating and beam reflection and scattering, which can be visualized with the appropriate hardware. Within this work, 4 kW fiber laser cutting is visualized by means of different approaches and the relationship between them is investigated. The melt flow dynamics is observed in the trim-cut configuration that allows analyzing the cutting front geometry with boundary conditions close to industrial processing.
Author(s): Alexandre Rondepierre, Thales LAS France SAS (France), PIMM Lab., Ecole Nationale Supérieure d'Arts et Métiers, CNRS (France); Olivier Casagrande, Thales LAS France SAS (France); Yann Rouchausse, Olivier Castelnau, PIMM Lab., CNRS, Ecole Nationale Supérieure d'Arts et Métiers (France); Laurent Berthe, Pimm Lab., CNRS, Ecole Nationale Supérieure d'Arts et Métiers (France)
27 January 2022 • 9:10 AM - 9:30 AM PST | Room 214 (Level 2 South)
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The Fast Laser Shock Peening (FLSP) process has been developed through a collaboration between the PIMM laboratory (CNRS, Paris, France) and Thales LAS (Elancourt, France). Based on the most advanced laser architectures relying on DPSS (Diode Pumped Solid State), for the first time LSP was performed at a repetition rate of 200 Hz. This high frequency may be bringing a lot of advantages for a larger deployment of the LSP process into the industry: faster treatment and beam delivery through optical fiber, mainly. Challenges regarding the water confinement (renewing and ejection) were investigated and solved.
Author(s): Hao Wang, Ruhr-Univ. Bochum (Germany); Jan Kaufman, Jan Brajer, HiLASE Ctr., Institute of Physics of the CAS, v.v.i. (Czech Republic); Evgeny L. Gurevich, Fachhochschule Münster (Germany); Andreas Ostendorf, Ruhr-Univ. Bochum (Germany)
27 January 2022 • 9:30 AM - 9:50 AM PST | Room 214 (Level 2 South)
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Laser shock peening as one kind of surface technique is used to enhance the mechanical property of metals, like aluminum alloy, stainless steel, and titanium alloy. The Ti6Al4V alloy specimens are processed with laser shock peening technology by nanosecond laser with a square laser spot. The hardness near-surface region and residual stress distribution in the top layer of Ti6Al4V alloy specimen are measured by Vickers hardness tester and hole drilling tester. The results show that the shock wave formed by laser shock peening can induce compressive residual stress in the top layer of Ti6Al4V alloy, which is beneficial for the improvement of fatigue life of Ti6Al4V alloy when it is used in aviation. The hardness of the near-surface region increases slightly in this research.
Author(s): Julian Kuklik, Laser Zentrum Hannover e.V. (Germany); Torben Mente, Institut für Integrierte Produktion Hannover gGmbH (Germany); Verena Wippo, Peter Jaeschke, Laser Zentrum Hannover e.V. (Germany); Benjamin Kuester, Institut für Integrierte Produktion Hannover GmbH (Germany); Malte Stonis, Institut für Integrierte Produktion Hannover gGmbH (Germany); Stefan Kaierle, Laser Zentrum Hannover e.V. (Germany); Ludger Overmeyer, Leibniz Univ. Hannover (Germany)
27 January 2022 • 9:50 AM - 10:10 AM PST | Room 214 (Level 2 South)
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Laser transmission welding (LTW) is a known technique to join conventionally produced thermoplastic parts, e.g. injected molded parts. When using LTW for additively manufactured parts (usually prototypes, small series, or one-off products), this technique has to be evolved to overcome the difficulties in the part composition resulted in the additively manufacturing process itself. In this paper, a method is presented to enhance the weld seam quality of laser welded additively manufactured parts assisted by a neural network-based expert system. To validate the expert system, specimen are additively manufactured from polylactide and welded using the recommended process parameter of the model.
Author(s): Dennis Haasler, Arnold Gillner, Fraunhofer Institute for Laser Technology ILT (Germany)
27 January 2022 • 10:10 AM - 10:30 AM PST | Room 214 (Level 2 South)
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In this paper the development of a deep hole drilling process with a commercially available ultrafast laser beam source will be presented. The goal is to create large and deep holes by ultrashort pulse laser radiation which could only be created by a melt dominated process so far. After discussion of the principal approach and its boundary conditions, a prototype optical system is used to create precise and cylindrical holes with a diameter >200 µm up to an aspect ratio of 20 in metals without any metallurgical defects in a few minutes.
Coffee Break 10:30 AM - 11:00 AM
Session 4: Multi Wavelength, Multi Spot
27 January 2022 • 11:00 AM - 12:20 PM PST | Room 214 (Level 2 South)
Session Chair: Stefaan Vandendriessche, Edmund Optics Inc. (United States)
Author(s): Verena Wippo, Julian Kuklik, Peter Jaeschke, Stefan Kaierle, Laser Zentrum Hannover e.V. (Germany)
27 January 2022 • 11:00 AM - 11:20 AM PST | Room 214 (Level 2 South)
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The number of parts made of thermoplastics PPS or PAEK are increasing. For joining these parts, laser transmission welding can be applied. The transmissivity of the joining members for the used wavelength has an influence on the welding parameters. Often diode lasers are used emitting from 808 nm to 980 nm. At this wavelength range, PPS and PAEK have a lower transmissivity than for example at 1532 nm, which should have an affect the welding process. In order to determine this influence, a study was conducted comparing the welding process with diode lasers emitting at 940 nm and 1530 nm.
Author(s): Daniel Flamm, TRUMPF Laser- und Systemtechnik GmbH (Germany); Julian Hellstern, TRUMPF Laser GmbH (Germany); Andreas Heimes, Felix Zimmermann, Abdolnaser Ghazagh, Jona Wohletz, TRUMPF Laser- und Systemtechnik GmbH (Germany); Fabian Kimmich, TRUMPF Laser GmbH (Germany); Jonas Kleiner, TRUMPF Laser- und Systemtechnik GmbH (Germany); Christoph Tillkorn, TRUMPF Laser GmbH (Germany)
27 January 2022 • 11:20 AM - 11:40 AM PST | Room 214 (Level 2 South)
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We demonstrate how high-energy ultrafast laser sources can be used to efficiently drive well-known low-energy micro-machining applications such as surface structuring of opaque and transparent materials. The presented optical concept employs micro-lens arrays, thus standard components, as central beam splitting elements to generate multiple focal spots for parallel processing. Here, a simple and robust opto-mechanical concept enables to control the number of foci ranging from a few ten up to a few hundred spots. Throughput scaling and complete use of the industry-grade ultrafast laser platform is discussed by means of selected micro-machining examples.
Author(s): Futoshi Tsutsumi, Naoya Kato, Panasonic Smart Factory Solutions Co., Ltd. (Japan); Naohiko Kobata, Daiki Imoto, Panasonic Corp. (Japan); Kentaro Miyano, Panasonic Smart Factory Solutions Co., Ltd. (Japan); Hiroki Kitagawa, Panasonic Corp. (Japan); Masaki Nobuoka, Panasonic Smart Factory Solutions Co., Ltd. (Japan)
27 January 2022 • 11:40 AM - 12:00 PM PST | Room 214 (Level 2 South)
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High power DDL operating in the 445nm region are rapidly evolving as one of the preferred laser technologies for welding, cutting, and engraving of highly reflective materials. Until recently, industrial blue laser sources have lacked the beam quality for performing remote processing of materials at the large working distances that are often preferred in many processes. In this paper we will review laser material processing results obtained with a new generation of industrial blue lasers with BPP of 1.4mm*mrad. We will present results from remote laser processes including, conduction mode welding, keyhole welding and engraving at long working distances.
Author(s): Matthieu Meunier, Aymeric Lucas, CAILabs (France); David Lemaitre, Nicolas Gaillard, Institut Maupertuis (France); Julien Bayol, Gwenn Pallier, CAILabs (France); Eric Laurensot, Institut Maupertuis (France); Guillaume Labroille, CAILabs (France)
27 January 2022 • 12:00 PM - 12:20 PM PST | Room 214 (Level 2 South)
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The development of LBW processes is driven by more complex laser-based welding processes made possible with the development of lasers of higher available power. Nevertheless, most laser-heads are based on refractive optics, limiting the capability to fully use this power. Multi-Plane Light Conversion (MPLC) is a fully reflective technology enabling complex beam shaping through a succession of phase plates. A MPLC-based laser head has been developed providing an annular shape. It presents a less than a 1mm focus shift. LBW as well as HLAW of steal up to 16kW is demonstrated with improved butt-joint configuration gap welds.
Conference Chair
Laser Zentrum Hannover e.V. (Germany)
Conference Chair
Aurora Innovation, Inc. (United States)
Program Committee
Bos Photonics (United States)
Program Committee
Coherent, Inc. (United States)
Program Committee
Univ. de Nantes (France)
Program Committee
Precitec GmbH & Co. KG (Germany)
Program Committee
Henrikki Pantsar
TRUMPF Inc. (United States)
Program Committee
BLZ Bayerisches Laserzentrum GmbH (Germany)
Program Committee
Osaka Univ. (Japan)
Program Committee
Edmund Optics Inc. (United States)
Program Committee
Laser Zentrum Hannover e.V. (Germany)
Additional Information


  • Submissions are accepted through 06-December
  • Notification of acceptance by 20-December

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