Affiliation:
1. Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences
2. CAS Center for Excellence in Ultra-intense Laser Science
3. Shanghai Institute of Optics and Fine Mechanics
Abstract
The performance of a mixture-based picosecond laser mirror (MPLM)
coating, particularly the picosecond (ps) laser-induced damage
threshold (LIDT), is investigated. Two types of 1053 nm ps
laser mirror coatings are deposited using electron-beam evaporation:
an MPLM coating consists of alternating layers of the
HfO2-Al2O3 mixture and
SiO2, and a traditional picosecond laser mirror (TPLM)
coating consists of alternating layers of HfO2 and
SiO2. Comparative studies on the optical, microstructural
and mechanical properties, and LIDT are carried out. For an
s-polarized 8 ps laser pulse at a wavelength of 1053 nm, the
ps-LIDT of the MPLM coating is approximately 1.2 times higher than
that of the TPLM coating in both atmosphere and vacuum test
environments. Typical damage morphologies and laser-induced
temperature simulations by finite element modeling suggest that the
enhanced LIDT of the MPLM coating may be attributed to the lower
laser-induced temperature rise in the MPLM coating.
Funder
National Natural Science Foundation of
China
Youth Innovation Promotion Association of
the Chinese Academy of Sciences
Subject
Electronic, Optical and Magnetic Materials
Cited by
2 articles.
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