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Trends in materials processing with laser radiation

 
: Kreutz, E.W.; Herziger, G.

Quenzer, A. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
High power CO2 laser systems and applications
Bellingham/Wash.: SPIE, 1989 (SPIE Proceedings Series 1020)
ISBN: 0-8194-0055-6
S.2ff.
European Congress on Optics (ECO) <1, 1988, Hamburg>
Englisch
Konferenzbeitrag
Fraunhofer ILT ()
chemical; coherence; dissipative mechanism; monochromaticity; nonreactive thermal processing; solidification; tunability

Abstract
The objectives of reactive chemical and nonreactive thermal processing with laser radiation are outlined giving indication that processing with laser radiation is governed by a hierarchy of time constants originating from photon-matter interaction, phase transition dynamics, laser source excitation fluctuations, and optical feedback in combination with the influence of beam delivery systems, processing/shielding gas flow configurations, robotics, production lines and environment. The minimization of losses by heat flow, reflection and transmission and the stringent need for quality assurance require as first approach the control of processing, which is mainly due to the capability of laser radiation source. The current status of laser radiation sources is reported giving information on the state of the art of processing with laser radiation in combination with subsequent demonstration of future trends and developments with respect to radiation sources, beam delivery, beam shaping, mate rials, processing and quality assurance.

: http://publica.fraunhofer.de/dokumente/PX-37033.html