Linear superpositions of gap solitons in periodic Kerr media
  The existence of a novel type of solitons in periodic Kerr media constructed as superposition of noninteracting gap-solitons of different kinds (bright, dark and periodic) is first demonstrated. The periodic modulation of the nonlinearity is used to suppress the cross phase modulation between components to allow the superimposed beam to propagate for long distances. 
Yuliy V. Bludov, Vladimir V. Konotop, and Mario Salerno
physics.optics cond-mat.other nlin.PS