SYMPOSIA PAPER Published: 01 January 1990

Pulse-Width Dependence of Optical Coating Damage at 1052 nm


Pulse-width dependence of optical coating damages at 1053 nm laser wavelength is studied. Quarterwave-thick single layer films of high-index materials of A12O3, ZrO2 and TiO2, and low-index materials of MgF2 and SiO2 were tested. Damage thresholds of the MgF2 and SiO2 films follow the square root dependence on the pulse-width τ (√τ scaling) over the pulse widths of 0.35-90 ns. Although the damage thresholds of the A12O3, ZrO2 and TiO2 films followed the √τ scaling from 0.35 to 1 ns, they become independent of the pulse-width for the pulse-widths longer than 6 ns. That is, the pulse-width dependence of the damage threshold is determined by the absorption property of the coating layer, which controls the damage mechanism.

Author Information

Yoshida, K
Ikunishi, S
Yoshida, H
Kato, Y
Nakai, S
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Developed by Committee: E13
Pages: 425–425
DOI: 10.1520/STP26510S
ISBN-EB: 978-0-8031-5157-4
ISBN-13: 978-0-8031-4478-1