Novel design of photonic crystal dense wavelength multiplexer based on nonlinear effect

Using a two-dimensional Finite-difference time-domain method (213 FDTD), we present an extensive study of a new type of the wavelength multiplexer system. The self focusing and defocusing of the light beam are considered in this paper. The coupling between different kinds of components integrated in the same chip, in terms of coupling efficiency, is evaluated. Ultra-Dense Wavelength Division Multiplexing system (UDWDM) is of increasing demand since it provides large broad spectra that satisfy large number of users world-wide. This system can be used in the high-capacity optical fibre communication systems. The UDWDM plays a central role in optical interconnection required for highdense integrated systems, in terms of light coupling between various optical chips.