Schiltz Drew, Patel Dinesh, Baumgarten Cory, Reagan Brendan A, Rocca Jorge J, Menoni Carmen S
Appl Opt. 2017 Feb 1;56(4):C136-C139. doi: 10.1364/AO.56.00C136.
TaO/SiO high reflection (HR) interference coatings for λ∼1 μm offer superior performance at high irradiance conditions. However, these coatings are not good candidates for high peak power conditions in comparison to HfO/SiO multilayer stacks. Here we show that the modification of the top layers design of a quarter wave TaO/SiO high reflector leads to 4-5 fold increase in the laser damage fluence compared to a quarter wave (TaO/SiO) when tested at λ=1.03 μm using pulse durations of 0.19 and 4 ns and peak power densities of 43.5 and 216 GW/cm. One of the designs achieved a laser damage threshold fluence of 174 J/cm at 4 ns, which is 10% higher than that of a HfO/SiO quarter wave design.
