METHOD AND APPARATUS FOR PRODUCING ANOMALOUS DISPERSION REGION IN ATOMIC VAPOR, METHOD AND APPARATUS FOR GAIN-ASSISTED SUPERLUMINAL LIGHT PROPAGATION AND APPARATUS FOR ADVANCED DETECTION OF INPUT OPTICAL SIGNAL

摘要

PROBLEM TO BE SOLVED: To realize superluminal light propagation.;SOLUTION: The method for realizing the superluminal light propagation is provided with a step to supply an atomic vapor having an atomic transition frequency and at least two ground states, a step to prepare atoms in the atomic vapor in at least one of the two ground states, a step to introduce a first Raman pump light beam of a first frequency and a first polarization via the atomic vapor a step to introduce a second Raman pump light beam of a second frequency via the atomic vapor, a step to detune the first and the second Raman pump light beams from the atomic transition frequency of the atomic vapor to the at least two ground states and thereby to form two Raman gain peaks and a step to introduce a probe beam of a second polarization reverse to the first polarization via the atomic vapor in an anomalous dispersion region and as a result to realize the superluminal light propagation of the probe beam.;COPYRIGHT: (C)2002,JPO