Laser Technik Journal

Aktuelle Ausgabe - Volume 14 Issue 3 (June 2017)

Cover Picture

Editorial

Contents

News

Products

Communications

Interview

Application Feature

Redesigning Medical Instruments Using 3D Metal Printing

Additive manufacturing (AM) methods of 3D printing are increasingly opening up new paths in medical technology. Alex Berry, founder of Sutrue (cf. Interview, p. 20), and Richard Trimlett, consultant at the Royal Brompton Hospital, are focusing strategically on AM for applications in cardiology. Is it possible to improve the “golden hands” of an experienced heart surgeon? Yes, it is. Using the example of a machine for...

  • Alex Berry
  • Seite 22-24

Laser Welding

Copper Welding with High‐Brightness Fiber Lasers

The consumer electronics and automotive industry are the driving forces for an increased use of copper in industrial processes and products. With the development of new battery technologies and higher battery capacities, the demands to the joining technologies are increasing. While soldering is still the state of the art for low power applications in consumer electronics, it is necessary to apply welding technology whenever...

  • Michael Grupp, Nils Reinermann
  • Seite 25-29

Laser Sources

The Challenge in Realizing Truly Agile Fiber Lasers

The master oscillator power amplifier (MOPA) fiber laser has been around for several years but the bulk of applications use Q‐switched fiber lasers. Now, with the processing capabilities of the Q‐switched fiber laser fully explored, the MOPA fiber laser is getting revived attention. Laser‐diode seeded MOPAs hold promise of arbitrarily modulated high‐power laser output. Pulse‐pumping the amplifiers to handle ON/OFF gating...

  • Martin Ole Berendt, Hugo Barbosa, Miguel Melo
  • Seite 30-33

Materials Processing

Laser Ablation for Advanced Surface Treatments

Laser ablation is gaining popularity for medical device applications that require stripping of coatings on cylindrical components like hypotubes and guide wires. It is also being widely used for advanced surface treatments, including discoloration or foaming of plastics and darkening or annealing of metal parts. Offering a repeatable non‐contact process, laser ablation is a clean, low dust (or no‐dust) way to selectively...

  • David Van de Wall
  • Seite 34-37

Laser Welding

Joining Dissimilar Materials with Pulsed Nanosecond Fiber Lasers

Industrial use of nanosecond lasers for applications such as marking, engraving, cutting, and even micromachining is well known – however, the use of these sources for welding and joining is relatively new. Most applications of high‐peak‐power, short‐pulsed lasers tend to be related to material removal, so their use for joining is perhaps counterintuitive. However, the versatility afforded by master oscillator power...

  • Jack Gabzdyl, Daniel Capostagno
  • Seite 38-41

Ultrashort Pulse Lasers

Hot or Cold Ablation – That's the Question

A new generation of ultrafast lasers with high average powers and high repetition rates is coming to the market. Those systems in principle bring together high precision processing and high throughput. But with high average power thermal effects show up the demand for a careful process planning. A new simulation tool from Fraunhofer ILT incorporates such effects and allows for precise process optimization even at high...

  • Markus Nießen, Lisa Bürgermeister, Nelli Hambach
  • Seite 42-44

Preview

EHLA: Extreme High‐Speed Laser Material Deposition

  • Thomas Schopphoven, Andres Gasser, Gerhard Backes
  • Seite 45-45

Laser Marking

For Eternity: The Idea of Labeling by Light

What do have shoes, brake callipers, Coke and cow earmarks in common? The permanent laser marking. Whether batch or charge number, best bevor date, official registration or further data – the production of consumer or industry products cannot be imagined without laser marking. With its unique performance laser marking guarantees extremely reliable, very flexible and automated markings for “eternity”. Numerous industries, as...

  • Benjamin Westdickenberg
  • Seite 46-49

Laser Welding

Fiber Laser Welding Cuts Costs and Improves Results

Lasers have been employed in a variety of welding applications for many years. And, as laser technology further develops and diversifies, its uses in welding continue to expand. This article provides an overview of high power lasers in keyhole welding. It then examines the characteristics and advantages of fiber laser sources for welding from Coherent‐Rofin, in particular, and reviews a specific application that has...

  • Wolfram Rath
  • Seite 50-52

Surface Processing

Thermal Spraying with Diode Lasers

Boiler tubes in biomass and incineration plants are exposed to extreme operating conditions. To create vapor pressure within the pipes that makes an effective drive of the power‐plant turbines possible, flue gas temperatures of up to 1000 °C must be realized within the combustion chamber of the boiler. No pipe‐material will sustain the chemical processes induced in this way for very long. Already at temperatures of 350 °C,...

  • Thomas Molitor
  • Seite 53-55

Additive Manufacturing

Light Designers

Tucked away behind the glass facade of Trumpf headquarters is a brain‐storming room used by an additive manufacturing team. This is where they craft strategies and opportunities to make this promising technology more productive and to extend its appeal to a broader user base. Although additive manufacturing is a hot topic and a popular choice for small‐batch production and prototyping, a lot must happen before additive...

  • Athanassios Kaliudis
  • Seite 56-57

Calendar

Meetings

Service

Buyers' Guide

  • Seite 62-64

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