Phys. Rev. Lett. 87, 170403 (2001) [4 pages]Atom Laser DivergenceReceived 28 June 2001; published 8 October 2001 We measure the angular divergence of a quasicontinuous, rf-outcoupled, free-falling atom laser as a function of the outcoupling frequency. The data are compared to a Gaussian-beam model of laser propagation that generalizes the standard formalism of photonic lasers. Our treatment includes diffraction, magnetic lensing, and interaction between the atom laser and the condensate. We find that the dominant source of divergence is the condensate-laser interaction. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.87.170403
DOI:
10.1103/PhysRevLett.87.170403
PACS:
03.75.Fi, 05.30.Jp, 32.80.Pj, 04.30.Nk
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