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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Anthony J. Campillo
  • Vol. 31, Iss. 7 — Apr. 1, 2006
  • pp: 1002–1004

Blue five-level frequency-upconversion system in rubidium

T. Meijer, J. D. White, B. Smeets, M. Jeppesen, and R. E. Scholten  »View Author Affiliations


Optics Letters, Vol. 31, Issue 7, pp. 1002-1004 (2006)
http://dx.doi.org/10.1364/OL.31.001002


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Abstract

We demonstrate production of continuous coherent blue laser light by using a five-level system in rubidium vapor. Two low-power lasers, at 780 and 776 nm , induce strong atomic coherence in the 5 S 5 P 5 D states. The atoms decay to the 6 P excited state, from which stimulated emission produces a coherent blue ( 420 nm ) beam. We have coupled both ground-state hyperfine levels, effecting coherence between four levels. The coherent blue output is enhanced by several mechanisms, including stronger coupling to a larger fraction of the atomic population, operation at a detuning such that the vapor is nominally transparent to the 780 nm pump field, reduced losses owing to optical pumping, and optimal phase matching. We report experimental findings and compare them with results from a semiclassical Maxwell–Bloch model.

© 2006 Optical Society of America

OCIS Codes
(190.7220) Nonlinear optics : Upconversion
(270.1670) Quantum optics : Coherent optical effects

ToC Category:
Quantum Optics

History
Original Manuscript: November 28, 2005
Manuscript Accepted: December 22, 2005

Citation
T. Meijer, J. D. White, B. Smeets, M. Jeppesen, and R. E. Scholten, "Blue five-level frequency-upconversion system in rubidium," Opt. Lett. 31, 1002-1004 (2006)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-31-7-1002

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