Nonlinear refractive indices in disordered NaT(XO4)2 T = Y, La, Gd, Lu and Bi, X = Mo, W laser crystals

Nonlinear index has been measured using z-scan technique in tetragonal disordered double tungstate and molybdate laser crystals. The n2is comparable or larger than in monoclinic double tungstates, with substantial enhancement found in NaBi(WO 4 )2.