Laser Technik Journal 2016/3 May

Laser Technik Journal May Issue

Laser Technik Journal 3/16 (Source: Wiley)

Cover Picture

Cover Picture: Laser Technik Journal 3/2016

Through functional coatings, the optics for compact UV laser systems gain specific transmission and reflectivity. (Source: LZH)

 

Editorial

SLT 2016: Highlighting Numerous Breakthroughs
  • Thomas Graf
  • p. 1

Contents

Content: Laser Technik Journal 3/2016
  • p. 2-3

News

News: Laser Technik Journal 3/2016
  • p. 4-8

Products

Products: Laser Technik Journal 3/2016
  • p. 10-11

Communications

Communications: Laser Technik Journal 3/2016

Battery Cells Perfectly Welded with 3D Laser Triangulation/New Coatings for Efficient and Compact UV Laser Systems/Optimized Laser Pulses Drill Narrower and Deeper Holes/Hard, Brittle and Transparent: The Laser Also Meets the Challenge of Glass

  • p. 12-14

Beam Sources

CO Lasers from Lab to Fab

First demonstrated over fifty years ago, carbon monoxide (CO) and carbon dioxide (CO2) lasers are similar technologies that took two different paths of development. CO2 lasers are deployed extensively in a wide range of industrial applications, and their use continues to grow. In contrast, CO lasers were largely restricted to laboratory applications, primarily because it was found to be difficult to produce CO lasers which offered the…

  • Andrew Held
  • p. 15-17

Beam Shaping

Promising Materials for High Power Laser Isolators

Northrop Grumman Synoptics is developing the growth of large singlecrystal fluoride materials for Faraday rotator / isolator applications. These materials exhibit smaller nonlinear refractive index and thermo‐optic coefficients, while maintaining Verdet constants near those of the commonly used terbium gallium garnet (TGG) crystals. In particular, the cubic potassium terbium fluoride, KTF (KTb3F10) crystal has low…

  • Kevin T. Stevens, Wolfgang Schlichting, Gregory Foundos, Alexis Payne, Evan Rogers
  • p. 18-21

Material Processing

Preview: Next Step in Laser‐Based Powder Bed Fusion — Multi Material Processing
  • Christian Seidel, Christine Anstätt
  • p. 21
Laser Welding of Glass Replaces Glueing Procedure

Glass welding with femtosecond lasers is now ready for industrial practice. Clever heat management prevents tension and cracks occurring in the material. Laser welding supersedes earlier joining methods such as glueing as well as offering a number of advantages: no additional materials are necessary, no evaporation and embrittlement of materials, and greater durability. Laser welded glass protective caps for laser light…

  • Elke Kaiser
  • p. 22-25

Process Monitoring

When Ideas Serve as Benchmark

Following the specialized press in the last five years the rise of low coherence interferometry as the prime sensor technology for quality assurance, quality control and even real‐time process control in nearly all laser materials processing areas is more than remarkable. The initial idea to use this technology for just measuring the depth of the keyhole in high power laser welding was soon extended, when Precitec…

  • Martin Schönleber, Markus Kogel‐Hollacher
  • p. 26-29

Beam Sources

Preview: Mid‐IR Lasers Based on Transition Metal Doped II‐VI Chalcogenides Are Coming of Age for Practical Applications
  • Sergey Vasilyev, Mikhail Mirov
  • p. 29-29

Material Processing

Laser Hardening

Hardening of materials by laser is a specialized yet fast‐growing field, as it offers improved wear resistance, expansion of component life, and increased strength and fatigue limits of the material.

  • Markus A. Ruetering
  • p. 30-33

Beam Control

Incline the Beam

Modern ultra‐short‐pulse (USP) laser systems are fostering new micro‐machining technologies. Hole drilling with high aspect ratios has become a particularly important application in several industries. But drilling straight walls with high aspect ratios is not feasible if the laser beam impacts specimens at a normal incidence angle. The beam caustic affects hole corners and limits the maximum aspect ratio — that’s why new…

  • Patricia Weber, David Diego‐Vallejo, Holger Schlüter
  • p. 34-36

Process Monitoring

OCT for Efficient High Quality Laser Welding

High requirements for duration and quality of laser welding are the main topics in the line production nowadays, especially in the automotive industry. With acquisition rates up to 100 kHz and microseconds duration capture times, optical coherence tomography (OCT) is a powerful adaptive tool, with a few microns resolution, for real‐time direct non‐contact investigation of material processing. The measurement system used to…

  • Nataliya Deyneka Dupriez, Christian Truckenbrodt
  • 37-41

Calendar

Events May 2016 — December 2016
  • p. 42

Meetings

Meetings: Laser Technik Journal 3/2016
  • p. 44-45

Service

Buyers’ Guide
  • p. 46-48

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