Sathy, P. Studies on two photon absorptions in certain laser dyes using pulsed photoacoustics and fluorescence techniques - Cochin Dept. of Physics - CUSAT 1992 - xiii, 136p. Guide: Nampoori, V.P.N.Thesis (Ph.D), CUSAT, 1992 Subjects--Index Terms: Lasers Guide: Nampoori, V.P.N. Universal Decimal Class. No.: 535.375.826 / SAT