All-optical switching and amplification of discrete vector solitons in   nonlinear cubic birefringent waveguide arrays
  We study all-optical switching based on the dynamical properties of discrete vector solitons in waveguide arrays. We employ the concept of the polarization mode instability and demonstrate simultaneous switching and amplification of a weak signal by a strong pump of the other polarization. 
Rodrigo A. Vicencio, Mario I. Molina, and Yuri S. Kivshar