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We report a large enhancement of yellow photostimulated luminescence (PSL) by codoping Tm 3 in Sr 3 SiO 5 :Eu 2 upon infrared stimulation at 980 nm after pre-exposure in Ultraviolet light. The initial PSL intensity and light storage capacity are enhanced by a factor of 33 and 2, respectively, for Tm 3 concentration at 0.0004. The thermoluminescence spectra indicate that codoping Tm 3 generates a trap peaking at 385 K. The trap is much more sensitive to infrared light than the original one, sodoi:10.1364/ol.38.000148 pmid:23454944 fatcat:4c3xjp7oqfcqpfelno2brvlaba