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

Authors
Pfister, O Brown, WJ Stenner, MD Gauthier, DJ
Citation
O. Pfister et al., Two-photon stimulated emission in laser-driven alkali-metal atoms using anorthogonal pump-probe geometry, PHYS REV A, 60(6), 1999, pp. R4249-R4252
Citations number
23
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW A
ISSN journal
10502947 → ACNP
Volume
60
Issue
6
Year of publication
1999
Pages
R4249 - R4252
Database
ISI
SICI code
1050-2947(199912)60:6<R4249:TSEILA>2.0.ZU;2-6
Abstract
We observe and analyze a two-photon continuous-wave optical gain mechanism designed for building a two-photon laser. The two-photon stimulated emissio n is spectrally isolated and resonantly enhanced using the multilevel struc ture of K-39, in conjunction with an alternative interaction geometry invol ving orthogonal beams and polarizations. The observed two-photon laser beam amplification increases linearly with low input laser beam intensity, as e xpected, and saturates at a gain of 2 x 10(-4) at high intensity. A theoret ical analysis of the observations is outlined. [S1050-2947(99)50812-3].