Observation of large continuous-wave two-photon optical amplification


Journal Article

We observe 30% two-photon optical amplification of a probe laser-field propagating through a laser-pumped potassium vapor. This amplification is spectrally isolated and substantially larger than that of previously reported continuous-wave two-photon amplifiers. The combination of large amplification and spectral isolation of the two-photon gain feature will greatly facilitate precise studies of the photon statistics of this highly nonlinear quantum amplifier and the development and characterization of a two-photon laser based on this gain medium. We also observe spectrally-distinct three-photon amplification [Formula Presented]%) in the same system under different experimental conditions. We present a simple model of the interaction that gives qualitative agreement with our observations and explains the dependence of the two-photon gain on the various system parameters. This model predicts that the size of the two-photon gain is quite sensitive to an interference between two different quantum pathways. © 1997 The American Physical Society.

Full Text

Cited Authors

  • Concannon, HM; Brown, WJ; Gardner, JR; Gauthier, DJ

Published Date

  • January 1, 1997

Published In

Volume / Issue

  • 56 / 2

Start / End Page

  • 1519 - 1523

Electronic International Standard Serial Number (EISSN)

  • 1094-1622

International Standard Serial Number (ISSN)

  • 1050-2947

Digital Object Identifier (DOI)

  • 10.1103/PhysRevA.56.1519

Citation Source

  • Scopus