We have successfully incorporated Sm2+ ions into alumino-silicate glasses using a sol-gel method. The gels synthesized through hydrolysis of Si(OC2H5)4, Al(OC4H9)3, and SmCl3(DOT)6H2O were heated in air, followed by heating in the presence of hydrogen, in which samarium ions were reduced from the trivalent to divalent state. Glasses incorporated with Sm2+ showed an intense emission with peaks at 683, 700, and 725 nm due to 5D0 yields 7F0,1,2 transitions, respectively, of the Sm2+ ions. Decay time was estimated to be 0.6 msec.
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