Blue Optimization Exponential Gain Of Sc:Mn:Fe:Linbo3 Crystals With Various Li/Nb Ratios

Doped with 0.1wt%MnCO3, 0.05wt%, Fe2O3 1mol% Sc2O3 and various Li/Nb ratios(0.94, 1.05, 1.20, 1.40) in LiNbO3 Sc:Mn:Fe:LiNbO3 crystals by Czochralski technique. The in frayed spectra of crystals were measured, the structure of crystals and occupancy site of ions were researched. The shifting mechanism of OH- absorption peak were discussed. The using Kr+ ion Laser as high source, the exponential gain coefficient and response time were measured. The blue exponential gain coefficient are higher one time than that: of red exponential gain coefficient, response time shorten to 1/10. The exponential gain coefficient with Li/Nb rations increase but increase. Response time with Li/Nb ration increase but decrease. The photorefractive properties of but LiNbO3 Sc:Mn:Fe:LiNbO3 crystals preferable to 532nm and 632.8nm.