Arrieta Yáñez, FranciscoMelle Hernández, SoniaGómez Calderón, ÓscarAntón Revilla, Miguel ÁngelCarreño Sánchez, Fernando2023-06-202023-06-202009-07-171050-294710.1103/PhysRevA.80.011804https://hdl.handle.net/20.500.14352/42813Received 12 July 2008 ©2009 The American Physical SocietyWe propose a technique to obtain slow and fast light propagations based on coherent population oscillations forced by a modulated pump. This mechanism produces an enhancement of 1 order of magnitude of the delay or advancement of light signals. The relative phase between the pumps to the signal fields is used as a knob for changing light propagation from ultraslow group velocities to negative group velocities. The experimental realization of the phenomenon was carried out in an erbium-doped fiber amplifier at room temperature.engjournal articlehttps://doi.org/10.1103/PhysRevA.80.011804open access530.145535.5Phase tunabilityCoherent population oscillationsNonlinear opticsQuantum opticsElectromagnetismoÓptica (Física)Teoría de los quanta2202 Electromagnetismo2209.19 Óptica Física2210.23 Teoría Cuántica