Protection against microsecond laser pulses

Protection against nanosecond laser pulses with self-activating materials is soon a reality. This report describes a measurement method of optical power limiting of microsecond laser pulses. The limiting properties of porphyrins, naphtalocyanine, tiophen, alcynylplatinum(II), carbon black suspension (CBS), C (sub60) and iodine were analyzed at the wavelength 582nm. The best clamping of micro-laser was attained at approx. -1 micro-subJ for the materials CBS and SiNc (50% photopic transmission). Further research is needed to develop new materials that can limit laser light of different pulse lengths.