NOT KNOWN DETAILS ABOUT LASER CRYSTAL

Visible strong-state lasers depending on laser crystals are compact and light. Lasers from deep red to blue are already noted. Especially, there were a lot of experiences on Pr3+ doped laser crystals, and steady wave lasers all around 490 nm are attained. Ti∶sapphire is the main gain crystal for ultrafast lasers. Superintense ultrafast lasers wit