New mechanism for continuous-wave two-photon amplification


Journal Article

A probe-laser beam is amplified using a laser-driven, high-density potassium atomic beam in the presence of a weak magnetic field. Two σ + -polarized beams tuned near the 4S 1/2 -4P 1/2 transition form an electromagnetically induced trapped state by optically pumping the atoms in the 4S 1/2 state. Two-photon amplification of the z-polarized probe beam occurs when the atom makes a transition from the 4S 1/2 trapped state to the 4S 1/2 state in the presence of a σ - -polarized pump-beam. In this two-photon Raman process, two photons are annihilated and two z-polarized probe photons are created. Analysis of the quantum pathways reveals that they add constructively, whereas other geometries or laser beam polarizations can lead to destructive interference between pathways.

Duke Authors

Cited Authors

  • Brown, WJ; Pfister, O; Gauthier, DJ

Published Date

  • January 1, 1998

Published In

  • Technical Digest European Quantum Electronics Conference

Start / End Page

  • 200 - 201

Citation Source

  • Scopus