LITTLE KNOWN FACTS ABOUT LASER CRYSTAL.

Visible strong-condition lasers based on laser crystals are compact and light. Lasers from deep pink to blue have already been noted. Specifically, there were plenty of studies on Pr3+ doped laser crystals, and constant wave lasers close to 490 nm have already been attained. Ti∶sapphire is the key gain crystal for ultrafast lasers. Superintense u