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Updated: Aug 17, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
Published on: August 12, 2013
Theory of critical enhancement of photorefractive beam coupling
E V Podivilov1, B I Sturman, M V Gorkunov
1International Institute for Nonlinear Studies, Koptyug Avenue 1, 630090 Novosibirsk, Russia.
Abstract:
We develop the idea of critical enhancement of the photorefractive response near the threshold of parametric excitation of space-charge waves (the spatial subharmonics) taking into account the vectorial character of beam coupling and a fairly strong broadening of the nonlinear resonance owing to light absorption. The results of our calculations are a description of the measurable characteristics of critical enhancement and optimization of the experimental conditions for detection of anomalously high amplification gain factors in cubic Bi(12)SiO(20) crystals.

