Noise-sustained dynamics of drifting patterns in a tilted nonlinear feedback system

We investigate experimentally the dynamics of pattern excitation in presence of an advection-like effect in a nonlinear optical system. This advection effect, created when the angle of incidence of the pump beam is not zero, causes the existence of: (i) a transition from convective to absolute instabilities, (ii) the formation of new pattern geometries, (iii) the seeding of noise-sustained structures. All these phenomena, previously observed in nonlinear Kerr-type systems, are demonstrated in our setup composed by a photorefractive nonlinear medium in a tilted feedback configuration

Control of pattern formation in a single feedback system by photonic lattices

We present the observation of the manipulation of modulational instability in a nonlinear dissipative system by a periodic photonic lattice. We use a setup based on a photorefractive BaTiO3 crystal in a single feedback mirror configuration leading to the formation of hexagonal patterns. Additionally, we impose an optical lattice to induce one or two-dimensional photonic band-gap structures with variable parameters. We show that by varying the lattice periodicity, thus adjusting the transverse spatial frequencies associated to the bandgap, we can induce patterns of particular symmetry or suppress the modulational instability when the position of the lattice bandgap coincides with the instability gain

Modulational instability and solitons in a periodic dissipative feedback system

International audienceWe review our recent experimental results on control of the modulational instability, pattern formation, and solitons in a nonlinear discrete dissipative feedback system. We show that the discreetness and bandgap effects can provide efficient control of the nonlinear instability modes of the system. Furthermore, we explore the possibilities for excitation of dissipative discrete solitons in such system through seeding with a narrow addressing beam

Laser Experiments for Chemistry and Physics. ByRobert N. Compton and Michael A. Duncan. OxfordUniversity Press, 2015. Pp. 416. Price GBP 35.00 (paperback,ISBN 9780198742982), GBP 70.00 (hardback, ISBN9780198742975): Book review

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Quantum-analogy-based solutions for robust photonics

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Generation of radially and azimuthally structured vectorial beams by polarization-scrambled cascaded conicaldiffraction

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Experimental demonstration of quantum-like effects using reconfigurable photoinduced optical waveguides

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Quantum-like approaches for robust photonics

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STIRAP-like effects in coupled tunable photo-induced waveguides

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