Vedadi, A.Alasia, D.Lantz, E.Maillotte, H.Thévenaz, LucGonzalez-Herraez, M.Sylvestre, T.2008-09-292008-09-292008-09-29200710.1109/LPT.2006.890039https://infoscience.epfl.ch/handle/20.500.14299/29915WOS:00024572400004110330We carried out distributed measurements of the longitudinal gain of fiber-optical parametric amplifiers using a novel sensing technique based on Brillouin optical time-domain analysis. Using this technique, we successfully characterized different gain behaviors in the linear and the saturation regimes. In addition, we demonstrated the recently predicted gain reciprocity at opposite ends of the amplifier spanBrillouin spectramultiwave mixingoptical fibre amplifiersoptical parametric amplifierstime-domain analysistext::journal::journal article::research article