Stoichiometric LiNbO3 single-crystal fibers for nonlinear optical applications

摘要: Abstract A vapor transport equilibration technique has been used to improve the homogeneity and adjust Li/Nb ratio in small LiNbO 3 single crystal rods fibers grown by laser heated pedestal growth method. When equilibrated with a Li-rich powder, containing mixture of Li NbO 4 , stoichiometric composition can be obtained. This treatment was raise phase-matching temperature congruent for second harmonic generation 1064 nm radiation from 238°C. The 238°C is above annealing photorefractive damage. property, along good optical homogeneity, should allow efficient conversion CW sources. We also, first time, demonstrated doubling 954 crystal.