Silver thiogallate (AgGaS2, AgGaSe2) crystal

BBAR coating - is a multilayer dielectric antireflection coating made at specified wavelength range. Standard coating is designed to reduce reflection losses at input side over 1.1-1.2 micron range and output side over 2.6-11 micron range. Typical reflection values are R<0.5% in the mid range, and up to reflection values of uncoated crystal at the edges of given range. BBAR coating is designed to minimise dispersion of ultrashort pulses and also features high damage threshold.