A Four-Channel Optical Demultiplexer Using Photonic Crystal-Based Resonant Cavities

Abstract

The aim of this paper was to propose and design an all optical four-channel demultiplexer using two-dimensional photonic crystals. To do so a resonant cavity was created by reducing the radius of the two adjacent rods. The radius of these defect rods was about 85 nm. The resonant cavity has a resonant mode at 1,557 nm. Then by using four resonant cavities with different radius values a four-channel optical demultiplexer was designed. The demultiplexer has four optical channels at λ1=1,537 nm, λ2=1,546 nm, λ3=1,553 nm and λ4=1,560 nm.

Evolution of Whispering Gallery Modes in Li-Doped ZnO Hexagonal Micro- and Nanostructures

“…In this paper, the evolution and quality of the resonant peaks in relation to the size and shape of the resonant cavity and to the reflectance efficiency of the facets are described. It was shown that doing measurements that mapped the evolution of the optical resonant modes along the length of the structure will helped to identify the regions with resonant cavities that had better performance for applications such as lasing [2,3,13,14], sensors [12], immunosensors [15], or optical filters [16][17][18].…”

Improved Low Crosstalk, High Transmission and Quality Factor Eight Channel Demultiplexer Based on Photonic Crystal

“…To construct ultra-compact optical DEMUXs, the structures should be able to control the propagation of light waves inside very small space and waveguides [16][17][18]. Due to their small size, excellent performance in optical sensors, high-speed data processing and optical networks, photonic crystals (PhCs) have provided new opportunities for designing all-optical devices required for realizing all the integrated optical circuits, communication networks and data processing systems [19][20][21][22]. Photonic crystals are composed of alternating layers of insulating materials.…”

Design of 6-channel optical demultiplexer/coupler using photonic crystal for IFoF in 5G networks

“…The demultiplexer operates in the C band with a coupling efficiency of 60%, size of 475 µm 2, and channel spacing of 0.8 nm. Through the design of resonant cavity structure, the authors in (Absalan 2018) have designed a four-channel demultiplexer that drops the wavelength between 1537 nm to 1560 nm by varying the defect rod of radius 85 nm. The authors in (2018) have considered a 4-channel demultiplexer using a hexagonal photonic ring resonator and modified Y structured waveguide.…”

“…Although the design has a transmission efficiency of 95% in Transverse Electric (TE) mode, the resonant wavelength is limited to 1310 nm. In literature, many works have been reported in the design of multiarm splitter by introducing point defects (2019; Singh and Singh 2017;2018;Ma et al 2020) and line defects with Arsenic Triselenide (As2Se3) Chalcogenide photonic crystals (Saghaei et al 2017). However, few works have been reported to improve the bandwidth with compact structure (Danaie et al 2018;Xu et al 2020;Liu et al 2020).…”