The dependence of the optical absorption band edge, ordinary and extraordinary refractive index, powder second harmonic generation and the non-linear coefficient, d33, of congruent LiNbO3 crystals doped with WO3 are reported. It has been found that the referred parameters show a clear singularity for a concentration in the range of 1.5-2%. In comparison with previous works on congruent LiNbO3 crystals doped with divalent and trivalent ions a charge compensation mechanism is proposed to explain the role of the cation. The experimental data of no and ne are described by a generalised Sellmeier equation considering the different ions sites in the sample.
- sellmeier equation
- LiNbO3 crystals
- optical absorption
Han, T. P. J., Hill, A., Gallagher, H. G., & Jaque, F. (2002). Optical properties of WO3 doped congruent LiNbO3 crystals. Chemical Physics Letters, 364(3-4), 323-327. https://doi.org/10.1016/S0009-2614(02)01285-X