Optical anisotropy and EO properties of ferroelectrics TGS and LHP single crystals using a HAUP technique C. Hernández-Rodríguez, R. Guerrero-Lemus and J. Herreros-Cedrés Eur. Phys. J. AP, 17 3 (2002) 189-200 Published online: 15 March 2002 DOI: 10.1051/epjap:2002012