Refined orientation of the optical axes as a function of wavelength in three monoclinic double tungstate crystals KRE(WO4)2 (RE = Gd, Y or Lu)

Identifier:  PC:2900

Handle: https://hdl.handle.net/20.500.11797/PC2900

Authors:  M. C. PUJOL; P. LOIKO; P. SEGONDS; P. L. INÁCIO; A. PEÑA; J. DEBRAY; D. RYTZ; V. FILIPPOV; K. YUMASHEV; X. MATEOS; M. AGUILÓ; F. DÍAZ; M. EICHHORN; B. BOULANGER

Abstract:
We measured a rotation of the dielectric frame as a function of wavelength of about 2° in the spectral range of 0.4-1.6 ¿m in the monoclinic double tungstate crystals, KRE(WO4)2 where RE = Gd, Y or Lu. We also refined the Sellmeier equations of their three principal refractive indices. By taking into account these data, we calculated the real orientation of the optical axes as a function of wavelength which is of key importance for the design of conical refraction lasers based on monoclinic double tungstate crystals.