Abstract
Development of passive optical limiters for eye and sensor protection has led to the search for mechanisms that involve large optical nonlinearities in organic materials. Photo-induced thermal effects appear to be a major mechanism in defocusing optical limiters, based on nonlinear refraction[1][2]. Until now, their efficiency has been demonstrated in the quasi steady-state regime, when pulse duration is larger than the thermal lens build-up time. In this paper, we demonstrate the influence of experimental parameters and material physical properties on the efficiency of thermal nonlinear effects in the nanosecond regime.
© 1996 Optical Society of America
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