The paper analyses electromagnetic wave propagation through nonlinear photonic crystal beam-splitters. Different lattice
configurations of Y-junction beam-splitters are simulated and propagation properties are investigated with introducing
nonlinearity with varying the rod size in crystal lattice. It is seen that nonlinear photonic crystal shows a considerable
band-gap even at low refractive contrast. The division of power in both arms of beam-splitters can be controlled by
varying the nonlinearity.