Novel composite beam splitter with directional coupler and Y-junction using photonic crystal

We propose and analyze a novel multiway high efficiency composite beam splitter based on propagation properties of the light waves in directional coupler and Y-junction. The splitting properties of the beam splitter have been numerically simulated and analyzed using the PWE and FDTD methods. Then in order to obtain equal distribution of power, we place and adjust some additional rods in the output waveguides to optimize the devices. It was shown that a large separating angle, a high beam rate, high flexibility, has been extended to have more light output channels in the beam splitter.