Broadband visible reverse saturable absorption in metallo-phthalocyanines

Summary form only given. In conclusion we have demonstrated that optical limiting in the visible over at least 220 nm is achievable in four metal substituted phthalocyanines. The choice of a broadband criterion on the linear transmittance of the dye led us to impose a fixed integrated photopic transmission (70%), which determines the concentration of the solutions. MPc´s with linear transmittance best adapted to the day vision response and good RSA properties (heavy metal substitution), as GaPc2, will then allow more efficient broadband optical limiting.