Abstract
Optical coating suppliers specialized to meet special needs of laser developers often have to face new challenges to help them in building high-performance, high-efficiency lasers. Some aspects of laser optical coating design and manufacturing are discussed. First an unconventional coating deposition technology, termed the reactive electron beam evaporation under reduced oxygen pressure, is reviewed. The technology is applied for the TiO 2 /SiO 2 and the Ta 2 O 5 /SiO 2 material pairs producing optical coatings with low absorption and scattering losses. Then some concrete application problems and their solutions are presented using our technology: high reflectance UV mirrors containing UV-grade HfO 2 layers; high-damage-threshold, visible/near-infrared power optics; mirrors with extended high reflectance bands (all-dielectric broadband reflectors); and elements of a specially designed mirror set for femtosecond pulse Ti:sapphire lasers. The mirror set for the Ti:sapphire laser has been optimized for both phase and amplitude characteristics.
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