Using a two-dimensional Finite-difference time-domain method (2D 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 high-dense integrated systems, in terms of light coupling between various optical chips.
We report a novel type of dispersive structure for wavelength multiplexer/demultiplxer based on a 2D photonic
crystal (PC) prism. The novel device is proposed using super dispersion of a 2D PC. Simulation is carried out to
determine the angular dispersion as a function of the period. The design has been optimized to improve the
performance of a system with moderate refractive index contrast. It is shown that by varying the incident angle in a
wavelength range from 1.3μm to 1.5μm, a superprism effect is observed. The performance of the devices is
investigated in terms of sensitivity and resolution, which would help to understand the behaviour of the superprism
prior to fabrication and its integration in photonic circuits.