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It has been proposed that reverse saturable dyes, with their fast response times, could be exploited in optical limiting components. We will report picosecond measurements and theoretical analysis for a range of phthalocyanine derivatives and for the model dye 1,3,3,1',3',3' hexamethylindotricarbocyanine iodine (HITCI). The HITCI results point out a fundamental problem with the use of induced absorption alone in limiting, namely the possible saturation of the excited-state absorption.
© 1993 Optical Society of America
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