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- W2008440062 abstract "We report on single optical beam splitting into several beams (the optical branching effect) in a single mode slab waveguide made from poly(methyl methacrylate) (PMMA) doped with dye 4-(Dicyanomethylene)-2-methyl-6-(pdimethylaminostyryl) 4H-pyran known as DCM. The effect is associated with permanent refractive index decrease accompanying upconverted dye photobleaching. Unlike the defocusing Kerr effect, the refractive index response to the optical field is nonlocal in time for the index depends on the absorbed energy instead ofthe instant light intensity. The effect therefore takes place at much lower power then nonlinear propagation effects in Kerr media (less than 1 kW/cm2 ).The proposed model of branching uses soliton-like solutions of Shrodinger-type nolmear propagation equation complemented by the rate equation for the refractive index change. Computer simulations based on the model demonstrate all the effects observed experimentally such as beam splitting into two primary side branches followed by their collapse into multiple secondary branches." @default.
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- W2008440062 date "1997-10-13" @default.
- W2008440062 modified "2023-09-23" @default.
- W2008440062 title "Nonlinear propagation of an optical beam in dye-doped polymeric waveguide with photobleaching" @default.
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- W2008440062 doi "https://doi.org/10.1117/12.279317" @default.
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