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8 September 2016Interaction of angular plane wave spectra of Bragg and non-Bragg orders in photorefractive lithium niobate
The exact solutions of the set of nonlinear coupled differential equations pertaining to Bragg and non-Bragg
orders for the case of interacting angular spectra in a photorefractive medium are obtained numerically. An iron
doped lithium niobate is used as a photorefractive material, and the incident wavelength is taken to be 514 nm.
During traditional two-beam coupling within a photorefractive material, many non-Bragg orders may also be
generated. For solving the set of coupled equations numerically, interactions between the spectra of two Bragg
and two non-Bragg orders are considered. The spatial evolution of the spectra of these diffracted orders hence their
spatial profiles are studied numerically for different incident profiles.
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Akash Kota, Ujitha Abeywickrema, Partha Banerjee, "Interaction of angular plane wave spectra of Bragg and non-Bragg orders in photorefractive lithium niobate," Proc. SPIE 9959, Optical Data Storage 2016, 99590C (8 September 2016); https://doi.org/10.1117/12.2239202