James, S.W. and Eason, R.W.
Extraordinary-polarised light does not always yield the highest reflectivity in self-pumped BaTiO3
Optics Letters, 16, (9), . (doi:10.1364/OL.16.000633).
For certain input geometries it is possible to double the phase-conjugate reflectivity of the self-pumped (cat) phase conjugator in BaTiO3, by the inclusion of an ordinary-polarized component in the input beam. It is also shown that it is possible to control the power in the phase-conjugate output with an overall gain. The observed enhancement is attributed to erasure of competing parasitic gratings by the ordinary-polarized component.
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