Low Loss Porous Core Photonic Crystal Fiber for Long Distance THz Radiation

Abstract

Fiber optic systems are important telecommunication infrastructure for world-wide broadband networks. Wide bandwidth signal transmission with low delay is a key requirement in present day applications. Optical fibers provide enormous and unsurpassed transmission bandwidth with negligible latency, and are now the transmission medium of choice for long distance and high data rate transmission in telecommunication networks. Our main objective is to design an optical waveguide which will be able to transmit terahertz signal into longer distances. In this thesis, two Porous-Core Photonic Crystal Fiber with ultralow Effective Material Loss (EML), high core power fraction and ultra-flattened dispersion is proposed for terahertz (THz) wave propagation. All the simulations are performed with Finite Element Modeling (FEM) package, COMSOL v4.3b. The design can be fabricated using stack and drilling method. This thesis examines effective material loss, core power fraction, modal effective area, dispersion, birefringence, confinement loss of the proposed waveguides. Characteristics analysis is done by varying the geometrical parameters. The results of the analysis are further compared with those of previous reported contributions