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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 25 — Dec. 7, 2009
  • pp: 22861–22870

Coherent and collimated blue light generated by four-wave mixing in Rb vapour

Alexander M. Akulshin, Russell J. McLean, Andrei I. Sidorov, and Peter Hannaford  »View Author Affiliations

Optics Express, Vol. 17, Issue 25, pp. 22861-22870 (2009)

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We investigate frequency up-conversion of low power cw resonant radiation in Rb vapour as a function of various experimental parameters. We present evidence that the process of four wave mixing is responsible for unidirectional blue light generation and that the phase matching conditions along a light-induced waveguide determine the direction and divergence of the blue light. Velocity-selective excitation to the 5D level via step-wise and two-photon processes results in a Doppler-free dependence on the frequency detuning of the applied laser fields from the respective dipole-allowed transitions. Possible schemes for ultraviolet generation are discussed.

© 2009 OSA

OCIS Codes
(190.7220) Nonlinear optics : Upconversion
(270.1670) Quantum optics : Coherent optical effects
(190.4223) Nonlinear optics : Nonlinear wave mixing

ToC Category:
Nonlinear Optics

Original Manuscript: October 9, 2009
Revised Manuscript: November 20, 2009
Manuscript Accepted: November 20, 2009
Published: November 30, 2009

Alexander M. Akulshin, Russell J. McLean, Andrei I. Sidorov, and Peter Hannaford, "Coherent and collimated blue light generated by four-wave mixing in Rb vapour," Opt. Express 17, 22861-22870 (2009)

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