Laser shock processing with 20 MW laser pulses delivered by optical fibers
- 15 March 2000
- journal article
- Published by EDP Sciences in The European Physical Journal Applied Physics
- Vol. 9 (3), 235-238
- https://doi.org/10.1051/epjap:2000109
Abstract
A large-core multi mode optical fiber is used to deliver 100 mJ, 5 ns laser pulses produced by a frequency-doubled Nd:YAG laser over a distance of several meters. No damage is observed neither inside the fiber nor at its surface. The transmitted pulses are focused to a diameter of 700 μm onto a water-immersed type 304 stainless steel sample for laser shock processing. With a pulse density of 10000 pulses/cm2, a compressive residual surface stress is achieved. The affected depth is almost 900 μm, the maximum compressive stress −700 MPa.Keywords
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