Pulse train generation by soliton fission in highly nonlinear chalcogenide (As₂S₃) waveguide Bragg grating
Luther-Davies, B.; Baker, N.J.; Roelens, M.A.F.; de Sterke, C.M.; Eggleton, B.J.; Madden, S.
Electronics Letters
Volume 45, Issue 15, July 16 2009 Page(s):799 - 800
Digital Object Identifier   10.1049/el.2009.1463
Summary:The conversion of a 3.9 ps optical pulse into a train of six 450 fs pulses within a 37 mm length of a highly nonlinear chalcogenide (As₂S₃) waveguide Bragg grating is reported. Here, the initial pulse develops into a sixth-order soliton and is split into its six fundamental solitons through soliton fission. The very large optical nonlinearity and strong photosensitivity of As₂S₃ enables the use of pulses that are 25 times shorter than in previous experiments, and have 500timesless energy. The results are compared to numerical modelling using the nonlinear coupled mode equations and find satisfactory agreement between experiment and theory after accounting for imperfections observed in the grating.

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