Phase tunability of group velocity by modulated-pump-forced coherent population oscillations

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Francisco Arrieta-Yañez, Sonia Melle, Oscar G. Calderón, M. A. Antón, and F. Carreño
Escuela Universitaria de Óptica, Universidad Complutense de Madrid, Arcos de Jalón 118, 28037 Madrid, Spain

Received 12 July 2008; published 17 July 2009

Wepropose a technique to obtain slow and fast light propagationsbased on coherent population oscillations forced by a modulated pump.This mechanism produces an enhancement of 1 order of magnitudeof the delay or advancement of light signals. The relativephase between the pumps to the signal fields is usedas a knob for changing light propagation from ultraslow groupvelocities to negative group velocities. The experimental realization of thephenomenon was carried out in an erbium-doped fiber amplifier atroom temperature.

URL:	http://link.aps.org/doi/10.1103/PhysRevA.80.011804
DOI:	10.1103/PhysRevA.80.011804
PACS:	42.50.Gy; 42.65.-k 42.50.Gy Effects of atomic coherence on propagation, absorption, and amplification of light 42.65.-k Nonlinear optics YEAR: 2009
KEYWORDS:	erbium, laser tuning, optical fibre amplifiers, optical modulation, optical pumping, optical saturable absorption, slow light

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