Ho:YAG is used as active laser crystal to generate 2,1 micron emission. It can be advantageously pumped with Tm-doped fiber laser at 1907 nm. The low quantum defect of Ho:YAG makes the heat load small, and gives the potential for scaling to high output powers.
Specification of CRYTUR Ho:YAG crystals:
Doping concentration: from 0,25% Ho:YAG up to 2% Ho:YAG
Maximum length of Ho:YAG laser rods: 120 mm