Up-conversion by APTE effect (Addition de Photons par Transferts d'Energie) in (Yb3+, Er3+) doped vitroceramics is used for the summation of 1.5 μm photons (signal) with 0.96 μm (pump). We discuss the different transfers schemes giving respectively the useful signal the losses and the noises in order to obtain a high detectivity IRQC (Infra Red Quantum Counter). Optimizing the vitroceramics preparation as well as the pumping flux intensity, a NEP of 10-11 W/Hz1/2 has been obtained at room temperature.
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Auzel et al. (1985) studied this question.
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