Growth and spectral properties of LiNbO3 doped with Zn

Undoped and Zn doped LiNbO3 crystals were grown by Czoehralski method, with Zn concentrations in the melts of 0, 1.0, 3.0, 6.0, 8.0, 10.0, and 12.0 mol. %, respectively. In the crystals with Zn concentration lower than 6.0 mol. %, the OH- absorption bands and Raman peaks change little compared with the undoped LiNbO3. But for the crystals containing higher than 6.0 mol. % Zn, the OH- absorption bands shift to shorter wavelength, and there are some changes in Raman spectra. The crystal structure change is discussed.