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Optics Letters

Optics Letters


  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 4 — Feb. 15, 2014
  • pp: 845–848

Directional infrared emission resulting from cascade population inversion and four-wave mixing in Rb vapor

Alexander Akulshin, Dmitry Budker, and Russell McLean  »View Author Affiliations

Optics Letters, Vol. 39, Issue 4, pp. 845-848 (2014)

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Directional infrared emission at 1.37 and 5.23 μm is generated in Rb vapors that are stepwise excited by low-power cw resonant light. The radiation at 5.23 μm originating from amplified spontaneous emission on the 5D5/26P3/2 transition and wave mixing consists of forward- and backward-directed components with distinctive spectral and spatial properties. Diffraction-limited light at 1.37 μm generated in the copropagating direction only is a product of parametric wave mixing around the 5P3/25D5/26P3/26S1/25P3/2 transition loop. This highly nondegenerate mixing process involves one externally applied and two internally generated optical fields. Similarities between wave mixing generated blue and 1.37 μm light are demonstrated.

© 2014 Optical Society of America

OCIS Codes
(190.7220) Nonlinear optics : Upconversion
(190.4223) Nonlinear optics : Nonlinear wave mixing
(190.4975) Nonlinear optics : Parametric processes
(280.1350) Remote sensing and sensors : Backscattering

ToC Category:
Nonlinear Optics

Original Manuscript: October 31, 2013
Revised Manuscript: December 18, 2013
Manuscript Accepted: December 30, 2013
Published: February 6, 2014

Alexander Akulshin, Dmitry Budker, and Russell McLean, "Directional infrared emission resulting from cascade population inversion and four-wave mixing in Rb vapor," Opt. Lett. 39, 845-848 (2014)

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