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By using a CW tunable F-center laser emitting between 1.4 and 1.6μ, room temperature excitations for 1 to 5 photons APTE effect (Addition de photon par transfert d'énergie [1]) are obtained for Er3+ doped vitroceramics. Theses materials, higly doped with R.E (1 to 15 %), have been shown to be very efficient medium for such up-conversion process because though in a glassy form they behave as doped microcrystals [2].
© 1984 Optical Society of America
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