Phys. Rev. A 56, 3255–3261 (1997)Amplification of laser beams counterpropagating through a potassium vapor: The effects of atomic coherenceReceived 21 April 1997; published in the issue dated October 1997 We observe amplification of a linearly polarized laser beam propagating through a Doppler-broadened atomic potassium vapor driven by an intense, linear and orthogonally polarized counterpropagating laser beam. The observed gain spectra are well explained by a model that incoporates only the effects of the coherent driving of the atomic dipole moment and not atomic recoil. Our results suggest that the recently reported observations of amplification and lasing using a laser-driven sodium vapor may not arise from the effects of collective atomic recoil. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.56.3255
DOI:
10.1103/PhysRevA.56.3255
PACS:
42.50.Gy, 42.50.Hz, 42.50.Vk
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