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Proceedings Paper

Monitoring of high-power laser beam profiles
Author(s): Michael A. O'Key; Michael R. Osborne; Paul A. Hilton
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Paper Abstract

Results are presented of an experimental investigation into various beam sampling and monitoring techniques applicable to high power laser systems. A hole matrix mirror displayed good sampling fidelity, and power handling capabilities in excess of 10 kW have been demonstrated. A holographic beam sampler displayed poor spatial fidelity in the sampled beams. The transmission leakage through a dielectric high reflector was shown to be an unreliable method of beam sampling due to non-uniform transmission characteristics. Phase profiles of beams with various aberrations have been recorded using a self referencing Mach Zehnder and a point diffraction interferometer. The results show a good correspondence with interferograms of the same aberrations obtained conventionally. The applicability of these devices to particular laser types in industrial environments is discussed.

Paper Details

Date Published: 7 September 1994
PDF: 11 pages
Proc. SPIE 2207, Laser Materials Processing: Industrial and Microelectronics Applications, (7 September 1994); doi: 10.1117/12.184717
Show Author Affiliations
Michael A. O'Key, AEA Technology (United Kingdom)
Michael R. Osborne, AEA Technology (United Kingdom)
Paul A. Hilton, TWI (United Kingdom)

Published in SPIE Proceedings Vol. 2207:
Laser Materials Processing: Industrial and Microelectronics Applications
Eckhard Beyer; Maichi Cantello; Aldo V. La Rocca; Lucien Diego Laude; Flemming O. Olsen; Gerd Sepold, Editor(s)

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