LASER means Light Amplification by Stimulated Emission of Radiation, It is one of the greatest inventions of mankind since the 20th century. As we all know,the three elements of laser include Pump source, gain medium and resonator. Laser-crylink mainly produces gain medium―laser crystal and laser glass in solid-state lasers. At the same time, we also produce Q-switched crystal for laser Q-switching to produce pulse laser and nonlinear crystal for laser frequency conversion. Laser-crylink has also begun developing and producing small solid lasers that are competitive in the market. Laser-crylink collectively referred to these laser related products as laser products.