Yttrium lithium fluoride (LiYF4, sometimes abbreviated YLF) is a birefringent crystal, typically doped with neodymium and used as a gain medium in solid-state lasers.
References
Yttrium lithium fluoride Wikipedia(Text) CC BY-SA
Yttrium lithium fluoride (LiYF4, sometimes abbreviated YLF) is a birefringent crystal, typically doped with neodymium and used as a gain medium in solid-state lasers.