Nonlinear Femtosecond Pulse Reshaping in Waveguide Arrays
  We observe nonlinear pulse reshaping of femtosecond pulses in a waveguide array due to coupling between waveguides. Amplified pulses from a mode-locked fiber laser are coupled to an AlGaAs core waveguide array structure. The observed power-dependent pulse reshaping agrees with theory, including shortening of the pulse in the central waveguide. 
Darren D. Hudson, Kimberlee Shish, Thomas R. Schibli, J. Nathan Kutz,   Demetrios N. Christodoulides, Roberto Morandotti, an...