Dye stability under excimer-laser pumping

摘要: The stability of polymethine dyes under XeCl laser excitation has been investigated. (For these emitting in the ir difference between absorbed and emitted photoenergy is 2 eV.) was measured an amplifier device operating saturated regime. While influence on dye concentration negligible, fluence dependence shows importance two photon absorptions. A meausure for number photons which can be per molecule before solution degraded to 50% initial value. This value range 150–280. clearly related formation photoproducts absorbing at pump wavelength. model starting from change absorption spectra very good agreement with observed energy decays.