Monitoring of high-power laser beam profiles

Michael A. O'Key; Michael R. Osborne; Paul A. Hilton

doi:10.1117/12.184717

7 September 1994 Monitoring of high-power laser beam profiles

Michael A. O'Key, Michael R. Osborne, Paul A. Hilton

Proceedings Volume 2207, Laser Materials Processing: Industrial and Microelectronics Applications; (1994) https://doi.org/10.1117/12.184717
Event: Europto High Power Lasers and Laser Applications V, 1994, Vienna, Austria

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.

Citation Download Citation

Michael A. O'Key, Michael R. Osborne, and Paul A. Hilton "Monitoring of high-power laser beam profiles", Proc. SPIE 2207, Laser Materials Processing: Industrial and Microelectronics Applications, (7 September 1994); https://doi.org/10.1117/12.184717

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