Ultraslow propagation of matched pulses by four-wave mixing in an atomic vapor

Details Ultraslow propagation of matched pulses by four-wave mixing in an atomic vapor Ultraslow propagation of matched pulses by four-wave mixing in an atomic vapor

2007-03-19

arxiv.org/abs/quant-ph/0703173v1

Physics

Quantum Physics

5 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.99.143601

We have observed the ultraslow propagation of matched pulses in nondegenerate four-wave mixing in a hot atomic vapor. Probe pulses as short as 70 ns can be delayed by a tunable time of up to 40 ns with little broadening or distortion. During the propagation, a probe pulse is amplified and generates a conjugate pulse which is faster and separates from the probe pulse before getting locked to it at a fixed delay. The precise timing of this process allows us to determine the key coefficients of the susceptibility tensor. The presence of gain in this system makes this system very interesting in the context of all-optical information processing.

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