Up–conversion detectors at 1550 nm for quantum communication: review and recent advancesM. Tournier, O. Alibart, F. Doutre, S. Tascu, M.P. De Micheli, D.B. Ostrowsky, K. Thyagarajan and S. TanzilliEAS Publications Series, 37 (2009) 311-339DOI: https://doi.org/10.1051/eas/0937039