Six-wave interaction with double wavefront reversal on thermal nonlinearity in a medium with a nonlinear absorption coefficient
V.V. Ivakhnik, V.I. Nikonov

 

Samara National Research University, Samara, Russia

Full text of article: Russian language.

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Abstract:
The spatial selectivity of a six-wave radiation converter w1 + w1 + w2 – w1 – w1 = w2 on thermal nonlinearity with allowance for the nonlinear absorption coefficient was studied. Relationships for the half-bandwidths of the spatial frequencies of object waves that are related both directly to the thermal nonlinearity and to the nonlinear character of variation of the absorption coefficient with varying signal wave divergence, nonlinear medium thickness, and pump wave intensity were analyzed. It was shown that for a highly diverging signal wave, the half-bandwidths of the spatial frequencies of object waves with a double-reversed wavefront are several times different.

Keywords:
six-wave radiation converter, double phase conjugation, thermal nonlinearity.

Citation:
Ivakhnik VV, Nikonov VI. Six-wave interaction with double wavefront reversal on thermal nonlinearity in a medium with a nonlinear absorption coefficient. Computer Optics 2017; 41(3): 315-321. DOI: 10.18287/2412-6179-2017-41-3-315-321.

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