The Research Of Nd: GGG Laser Crystal And All-Solid-State Laser Component

This paper has mainly studied the working material and element for Diode Pump Solid State Laser:Nd:Gd₃Ga₅O₁₂ (Nd:GGG for short),and also introduce Diode Pump Solid State Laser instrument and its developing tendency briefly.Polycrystalline material was prepared by liquid-sate reaction and solid-state reaction. Nd:GGG crystal was grown by Czochralski method.We solved the volatilization of gallium. The grown crystals were processed into elements, then we took the test of crystal optical-property.The size of Nd:GGG crystal wasΦ28-35×80-100mm,element size wereΦ5×50mm and 3×3×2mm.The result of the crystal testing showed that the absorbing summit of Nd⁺³ ion was near by 808 nm, absorption bandwidth was more than 10 nm.The fluorescence emission peak was near by 1062 nm,which was caused by ⁴F_3/2-⁴I_11/2 energy level transition .The stimulated emission section of Nd:GGG was 21.63×10^-20cm² at 1062 nm.Under the pulse Xemon lamp pumping power of 25.92 J, 24.77mJ output power was gotten . With LD pumping of 900mW,We get 305mW output by the Nd:GGG at the length of 1062 nm, which indicated the Nd:GGG crystal was in normal laser state.