Measurement of refractive indices and thermal refractive-index coefficients of 7.5-mol.% Nb:KTiOPO4 crystal

H Shen; D Zhang; W Liu; W Chen; G Zhang; G Zhang; W Lin

doi:10.1364/ao.38.000987

Measurement of refractive indices and thermal refractive-index coefficients of 7.5-mol.% Nb:KTiOPO4 crystal

Appl Opt. 1999 Feb 20;38(6):987-90. doi: 10.1364/ao.38.000987.

Authors

H Shen¹, D Zhang, W Liu, W Chen, G Zhang, G Zhang, W Lin

Affiliation

¹ Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian Fuzhou 350002, China. [email protected]

PMID: 18305703
DOI: 10.1364/ao.38.000987

Abstract

The principal refractive indices and the thermal refractive-index coefficients of 7.5-mol.% Nb:KTiOPO(4) crystal were measured by autocollimation for wavelengths of 0.53975, 0.6328, 1.0795, and 1.3414 microm from room temperature to 143 degrees C. The Sellmeier equations at room temperature were obtained and used to calculate the optimal phase-matched angles for 1.0642 and 1.0795 microm. The calculated and experimental values are in good agreement.