Optical coatings for high-power neodymium lasers

An investigation was made of the influence of various technological factors governing the deposition and structure of optical coatings, made of refractory oxides and SiO₂, on the damage threshold of single-layer multilayer systems. It was found that under optimal deposition conditions it was possible to prepare coatings (both highly reflecting and transmitting) with a damage threshold comparable with the threshold of the surface of glass exposed to neodymium laser radiation pulses of 2–85 ns duration.