M. Stehlik, G. Govindassamy, J. Zideluns, F. Lemarchand, F. Wagner, J. Lumeau, J. Mackenzie, L. Gallais
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Sub-ps 1030 nm laser-induced damage threshold evaluation of pulsed-laser deposited sesquioxides and magnetron-sputtered metal oxide optical coatings
Crystalline sesquioxide films (Sc2O3, Y2O3, Lu2O3) produced by pulsed-laser deposition were examined for laser damage resistance with pulses of 500 fs duration, at a wavelength of 1030 nm and at a 10 Hz repetition rate. Comparable tests were performed with amorphous magnetron-sputtered thin films (SiO2, HfO2, Nb2O5). We found the laser-induced damage thresholds of the sesquioxides are close to those of HfO2 in the multi-pulse test regime. The results are the basis for designs of damage resistant re ective components used in ultrashort-pulse lasers.
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