APS » PROLA » Phys. Rev. A » Volume 60 » Issue 6

Phys. Rev. A 60, R4249 - R4252 (1999)

Two-photon stimulated emission in laser-driven alkali-metal atoms using an orthogonal pump-probe geometry

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Olivier Pfister *, William J. Brown, Michael D. Stenner, and Daniel J. Gauthier †
Department of Physics and Center for Nonlinear and Complex Systems, Duke University, Durham, North Carolina 27708-0305

Rapid Communication Received 19 August 1999

We observe and analyze a two-photon continuous-wave optical gain mechanism designed for building a two-photon laser. The two-photon stimulated emission is spectrally isolated and resonantly enhanced using the multilevel structure of 39K, in conjunction with an alternative interaction geometry involving orthogonal beams and polarizations. The observed two-photon laser beam amplification increases linearly with low input laser beam intensity, as expected, and saturates at a gain of 2×10-4 at high intensity. A theoretical analysis of the observations is outlined.


©1999 The American Physical Society

URL: http://link.aps.org/abstract/PRA/v60/pR4249
DOI: 10.1103/PhysRevA.60.R4249
PACS: 42.50.Gy, 42.50.Hz, 42.65.Dr

* Present address: Department of Physics, University of Virginia, 382 McCormick Rd., Charlottesville, VA 22903.
† Author to whom correspondence should be addressed.

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