Abstract
The effect of absorption at the lasing wavelength due to the accumulation of reaction products from the photodegradation of a laser dye is analyzed theoretically. This analysis is used as a basis for the representation of data from dye degradation experiments in terms of absorption at the lasing wavelength. Studies of the effects of flashlamp pulse rate and time on the inferred absorption for a number of different dyes reveal the influence of secondary chemical reactions. The most significant effects are shown to be associated with spontaneous reactions where the reactants and products have markedly different molar absorptivities at the lasing wavelength.
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