From Event: SPIE Optical Engineering + Applications, 2016
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.
Akash Kota, Ujitha Abeywickrema, and 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 (Presented at SPIE Optical Engineering + Applications: August 28, 2016; Published: 8 September 2016); https://doi.org/10.1117/12.2239202.
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