Open AccessWavelength dependence of the mechanisms governing the formation of nanosecond laser-induced damage in fused silica
Author(s) -
Maxime Chambonneau,
Jean-Luc Rullier,
P. Grua,
Laurent Lamaignère
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.021819
Subject(s) - wavelength , nanosecond , materials science , optics , laser , infrared , optoelectronics , physics
The influence of the wavelength on the morphology of nanosecond laser-induced damage on the exit surface of fused silica is investigated. A combination between the typical features of damage sites initiated at 1064 nm and 355 nm is observed at 532 nm, including ring patterns sporadically exhibited, in good agreement with calculations of the development of an electron avalanche at this wavelength. The associated ring appearance speed scales as the cube root of the laser intensity, and is ~10.5 km/s while it is ~20 km/s when initiated by infrared pulses. The whole set of results sheds light on the different wavelength-dependent mechanisms governing damage formation.