In:
Optics Express, Optica Publishing Group, Vol. 29, No. 6 ( 2021-03-15), p. 8171-
Abstract:
Metal-dielectric low dispersion mirrors (MLDM) have a promising application prospect in petawatt (PW) laser systems. We studied the damage characteristics of MLDM and found that the damage source of MLDM (Ag + Al 2 O 3 +SiO 2 ) is located at the metal-dielectric interface. We present the effect of the interface on the femtosecond laser damage of MLDM. Finite element analysis shows that thermal stress is distributed at the interface, causing stress damage which is consistent with the damage morphology. After enhancing the interface adhesion and reducing the residual stress, the damage source transfers from the interface to a surface SiO 2 layer, and the damage threshold can be increased from 0.60 J/cm 2 to 0.73 J/cm 2 . This work contributes to the search for new techniques to improve the damage threshold of MLDM used in PW laser systems.
Type of Medium:
Online Resource
ISSN:
1094-4087
Language:
English
Publisher:
Optica Publishing Group
Publication Date:
2021
detail.hit.zdb_id:
1491859-6