Abstract

Changes of LiNbO<sub>3</sub> composition induce refractive index changes. Refractive index changes in LiNbO<sub>3</sub> fabricated by vapor transport equilibration process was investigated using the Z-scan method and Maker’s fringe experiment. In non-critical phase matched second-harmonic generation, the phase matching temperature and the birefringence change for temperature were measured. The phase matching temperature of Li-compensated LiNbO<sub>3</sub> was observed around 230&deg;C and the birefringence change for temperature was smaller than that of congruent LiNbO<sub>3</sub>.

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