We design a 1 X 4 optical splitter made of photonic crystal waveguides and analyze the properties of the optical splitter using the finite-difference time-domain method. Our simulation results show that the transmission properties vary with bend geometries and wave frequencies. Additionally we perform numerical simulations of T-shaped waveguide branches in the splitter to reduce the reflections at the T- branches. The improvement of transmission is achieved by placing the defects of extra rods in the branching region.
Ji Soo Yoon,
G. Hugh Song,
"Analysis of optical splitters in photonic crystals", Proc. SPIE 4655, Photonic Bandgap Materials and Devices, (25 April 2002); doi: 10.1117/12.463895; https://doi.org/10.1117/12.463895