LITTLE KNOWN FACTS ABOUT BIBO CRYSTAL.

Hygroscopic crystal components deteriorate when they're not constantly stored in adequately dry air (or even a dry purge fuel). This applies e.g. to KDP and BBO, and in a lesser extent to LBO. It could be valuable to help keep this kind of crystal at a to some degree elevated temperature, which makes it simpler to retain it dry.Kingwin Optics gives