Modeling and design of 2D photonic crystal based Y type dual band wavelength demultiplexer

Abstract

In this paper, photonic bandgap (PBG) induced wave guiding application of photonic crystals is exploited to design Dual Band Wavelength Demultiplexer (DBWD) for separating two telecommunication wavelengths, 1.31 and 1.55 µm. Two designs that use silicon rods in air and embedded air holes in silicon are realized for this purpose. Plane wave expansion (PWE) method and two dimension Finite Difference Time Domain (FDTD) methods are used to design and analyze the DBWD in Y type photonic crystal structure. Numerical analysis indicates that these designs enable the separation of two wavelengths with very high optical power extinction ratios. Other filter parameters like transmittance and quality factor are also calculated to confirm superior performance of the proposed design of photonic crystal based DBWD.

Photonic Crystal Analog to Digital Converter A Literature Review, Challenges, and Some Novel Trends

“…Where 𝜒 (2) (i.e. that can be neglected as considering the nonlinear material has crystal symmetries), 𝜒 (3) , and E are the second-order, third-order nonlinear susceptibilities, and the electric field [78], respectively.…”

“…Photonic crystals are appropriate for implementing optical communications systems, signal processing systems and optical integrated circuits [1]. Processing signals is an important stage in communication networks, it is recommended to have separate digital signals as inputs of the signal processing stage [2], so a conversion process is required to get discrete optical waves from analog ones. Therefore, OADCs are so important to realize the complete optical networks.…”

An Optimized and Logic Gate with High Transmission and Low Losses Based on Y-junction

“…Currently the optical logic gates have received much attention for their applications in real time optical processing and information communications [5], such as, AND logic gate is used to perform address recognition, packet header modification, and data integrity verification, * corresponding author; e-mail: maroma18@yahoo.fr and as a sampling gate in optical sampling oscilloscope owing to their ultrafast operation compared to the traditional electrical methods [6,7].…”

Photonic-crystal-based all-optical NOT logic gate

“…PBG-induced waveguiding applications of such materials can be used for localization and trapping of light over a band of wavelengths [3][4][5][6][7]. The twodimensional PhCs have a high refractive index contrast that plays an important role in controlling the propagation modes, accurate PBG calculation, efficient light confinement, simple design, and easy fabrication [8][9][10][11]. These structures have dimensions of the order of wavelengths of light for future photonic integrated circuits.…”