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Paper detail

Spatial-domain interactions between ultra-weak optical beams

We have observed the spatial interactions between two ultra-weak optical beams that are initially collinear and non-overlapping. The weak beams are steered towards each other by a spatially varying cross-Kerr refractive index waveguide written by a strong laser beam in a three-level atomic medium utilizing quantum coherence. After being brought together, the weak beams show controllable phase-dependent outcomes. This is the first observation of soliton-like interactions between weak beams and can be useful for all-optically tunable beam-combining, switching and gates for weak photonic signals.

preprint2013arXivOpen access
Utsab KhadkaJiteng ShengMin Xiao
physics.atom-phphysics.optics
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Utsab KhadkaJiteng ShengMin Xiao

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