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We present experimental and numerical progress in the development of nonlinear directional couplers based on multicomponent glass photonic crystal fibre. The first part of the paper reports a multi-wavelength nonlinear switch, operating in ultralong wavelength optical communication band, based on a special square lattice dual-core photonic crystal fibre excited with femtosecond pulses. The soliton-fission...
Optical parametric chirped pulse amplification (OPCPA) is rapidly gaining ground as an approach to generate intense few-cycle pulses and reach IR wavelength ranges [1]. However, the high OPA gain has its negative side: for a bell-shaped intensity profile of the pump pulse/beam the unsaturated gain varies exponentially with intensity, resulting in an effective temporal/spatial filter. Here we demonstrate...
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