Routing of Optical Baseband Signal Depending on Wavelength in Periodic Structure

Abstract

Square lattice two-dimensional photonic crystal waveguide with nonlinearity and linear dispersion is numerically analyzed for optical wavelength division multiplexing (WDM). In steady state for Gaussian beam incidence, the distribution ratio is calculated from the electric field profile of the three output ports. As a result, it is possible to switch the output port by changing the wavelength of the input signal. This result shows that passive all-optical switching is possible.