Laser Technik Journal 2015/4 September

Laser Technik Journal September issue published

Laser Technik Journal September issue published

Cover Picture

Editorial

Contents

News

Products

Communications

Communications: Laser Technik Journal 4/2015

Next Generation of High Power Lasers/A New Femtosecond Laser for Industry/Printing Implants with Selective Laser Micro‐Melting/Gluing with the Laser/Diode Lasers Bars with 2kW Output Power/Using a New Laser Process to Custom‐Shape Optical Fibers/The World’s First White Lasers

  • Page 14-19

Interview

Rofin‐Sinar: Ready for the 5 th Decade

  • Oliver Dreissigacker, Carmen Teutsch
  • Page 20-21

Plastics Welding

More Complexity and Higher Quality

The demands for more complexity and higher quality joining methods are rising continuously in the automotive and medical technology sectors, as well as in consumer goods. There are major differences between laser plastic welding and other technologies — this is why it is conquering more and more areas of applications with new laser systems and methods.

  • Malte Borges
  • Page 22-26

Laser Cutting

Cool Laser for Cutting Diamonds

Diamond cutters have been looking for a laser cutting tool that can slice through a diamond without causing any thermal damage. Raw diamonds can contain inclusions in the form of non‐diamond hybrid materials or air bubbles, making them susceptible to damage from intense heat during laser cutting. The heat of a conventional laser beam can cause the inherent material tension in such inclusions to explode the stone….

  • Nitin Shankar
  • Page 27-29

Deposit‐free Cutting of Polycarbonate

Until now, it has not been possible to cut polycarbonate free from visible deposits using laser radiation. Through a smart process control it has been possible to produce cut edges which show no visible deposits or degraded material. The polymer, its additives, the process parameters and the process equipment determine the quality. Only their correct combination leads to good results.

  • Kai Holl, Eva Seidel, Thomas Seul
  • Page 30-33

Process Monitoring

Process Monitoring at Laser Welding of Thermoplastics

A pyrometer, integrated into a 3D‐scanner, offers the possibility to measure the weld seam temperature at quasi‐simultaneous laser transmission welding. Experimental studies have shown that gaps located in the joining zone can be identified by a temperature rise even at a high scanning velocity. This enables the implementation of algorithms for observation and control strategies.

  • Anton Schmailzl, Sebastian Steger, Stefan Hierl
  • Page 34-37

Beam Delivery Systems

Industrial Fiber Beam Delivery System for Ultrafast Lasers

Free space beam delivery has long been the only option to transport high energy laser pulses. But what happens if the free space is surrounded by an optical fiber? Micro‐structured hollow core fibers now make it possible to confine the laser light inside a small hollow core and transmit pico‐ and femtosecond pulses of high energy with excellent beam quality. Packaged into a rugged laser light cable, this is likely the start…

  • Max Funck, Björn Wedel
  • Page 38-41

Laser Beam Welding

Mobile Vacuum in Pocket Format

The presented apparatus enables laser beam welding of thick materials under local reduced pressure conditions, thus improving the quality of welds and reducing the laser beam power necessary for complete penetration welding. The vacuum cap presented in this article uses a local reduced ambient pressure environment in a tight zone around the welding area and, in contrast to a conventional vacuum chamber, it is movable in the…

  • André Schneider, Andrey Gumenyuk, Michael Rethmeier
  • Page 43-46

Calendar

Meetings

Service

Buyers’ Guide

  • Page 53-56

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