OPTICAL PROPERTIES OF Tm DOPED LiNbO3 AND LiNbO3 (MgO) J.O. TOCHO, L. NÚÑEZ, J.A. SANZ-GARCÍA, F. CUSSÓ, D.C. HANNA, A.C. TROPPER, S.J. FIELD, D.P. SHEPHERD et A.C. LARGE J. Phys. IV France, 01 C7 (1991) C7-293-C7-296 DOI: 10.1051/jp4:1991779