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Proceedings Paper

Effect of particular nonlinear dispersion in photorefractive four-wave mixing on slow and fast light
Author(s): Konstantin Shcherbin; Pierre Mathey; Dean R. Evans
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Paper Abstract

The phase shift occurred by optical waves in nonlinear interaction may be considered as phase shift resulted from a nonlinear refractive index. Consequently, a spectrum of the nonlinear phase shift in non-degenerate in frequency interactions represents nonlinear dispersion. Thus the nonlinear interaction with such dispersion may be used to achieve slow and fast light. The phase-conjugate reflectivity in photorefractive four-wave mixing may reveal spectrum with two maxima, which are located symmetrically with respect to zero frequency detuning. A complicated nonlinear dispersion corresponds to such reflectivity spectrum. Qualitative analysis of the nonlinear dispersion suggests unusual behavior when the nonlinear effect, i.e., delay of the light pulse, may decrease with increase of nonlinear coupling strength. The numerical calculations confirm such a nontrivial behavior. The experimental conditions are found, for which the delay of the phase-conjugate pulse decreases when the coupling strength increases. The conclusions of the theoretical analysis are confirmed experimentally for photorefractive four-wave mixing in barium titanate.

Paper Details

Date Published: 22 February 2018
PDF: 7 pages
Proc. SPIE 10548, Steep Dispersion Engineering and Opto-Atomic Precision Metrology XI, 105480X (22 February 2018); doi: 10.1117/12.2292709
Show Author Affiliations
Konstantin Shcherbin, Institute of Physics (Ukraine)
Pierre Mathey, Lab. Interdisciplinaire Carnot de Bourgogne, CNRS, Univ. de Bourgogne (France)
Dean R. Evans, Air Force Research Lab. (United States)

Published in SPIE Proceedings Vol. 10548:
Steep Dispersion Engineering and Opto-Atomic Precision Metrology XI
Selim M. Shahriar; Jacob Scheuer, Editor(s)

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