Quarter wavelength optical designed single layer and double-layer sol-gel derived metal oxide based antireflection (transmission, 98-99% at 1054 nm) coatings have been fabricated on quartz glass optics. In addition, high reflection (>55% at 1054 nm) of 5-layer coating on quartz glass has been developed in the reporting period. The coatings showed high laser damage threshold value.
Transmission spectrum (a) and photograph (b) of double layer AR coated quartz glass.
(c) Reflection spectrum of 5-layer high reflection coating on quartz glass