Introduction to Ruby Laser
Ruby laser is a kind of laser, and its working substance is ruby rod. Soon after the idea of a laser was put forward, ruby was first used to make the world's first laser. The matrix of the ruby crystal for laser is Al2O3, and the crystal is doped with about 0.05% (weight ratio) Cr2O3. It has become an indispensable basic instrument and equipment in medicine, industry and many scientific research fields.