Interference-induced optical gain without population inversion in cold, trapped atoms
نویسندگان
چکیده
Continuous-wave ~cw! optical gain of 1.3310 cm is obtained on a probe transition in a driven, threelevel, V-type atomic system. The atoms exhibit no population inversion between the probe excited state and the dressed ground states of the combined atom-drive Hamiltonian. This gain without population inversion is interpreted as direct evidence of quantum interference, arising from coherences established in the atom by the applied optical fields. Agreement with a simple four-level theoretical model is excellent. @S1050-2947~99!01306-2#
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