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3 August 1998 Optical beam splitting in a nonlinear polymer waveguide
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Proceedings Volume 3487, International Conference on Singular Optics; (1998)
Event: International Conference on Singular Optics, 1997, Partenit, Crimea, Ukraine
We report on single optical beam splitting into several beams in a slab waveguide made of poly(methyl methacrylate) (PMMA) doped with dye 4-(Dicyanomethylene)-2-methyl-6-(p- dimethylaminostyryl)4H-pyran known as DCM. The effect is associated with permanent refractive index decrease caused by upconverted dye photobleaching. The effect takes place at much lower power than nonlinear propagation effects in Kerr media (less than 1 kW/cm2). The proposed model of splitting uses soliton-like solutions of Shrodinger-type nonlinear 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. Simulations also show that the beam sent through a (pi) -step phase mask has behavior similar to that of a spatial dark soliton.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Sergey S. Sarkisov, Aaron Wilkosz, and Putcha Venkateswarlu "Optical beam splitting in a nonlinear polymer waveguide", Proc. SPIE 3487, International Conference on Singular Optics, (3 August 1998);

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