Cr4+:YAG:
Cr:YAG with Brewster for Q-swich and Cr；YAG lasers.


Bonding Crystals:
YAG+Nd:YAG，Cr4+:YAG+Nd:YAG,
YAG+Nd:YAG+Cr4+YAG+YAG，
YAG+Cr4+:YAG+Nd:YAG，and
YAG+Er:YAG+Nd:YAG+Cr4+YAG+YAG

Coating is upon your requirments.
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