Structural dependence of transmission characteristics for photonic crystal fiber with circularly distributed air-holes

Abstract

<jats:title>Abstract</jats:title><jats:p>In this study, design and transmission characteristics of a special type of photonic crystal fiber (PCF) geometry namely, circular-lattice photonic crystal fiber (C-PCF) structure are presented. The cladding of the structure consists by a cylindrically symmetrical distribution of air-holes in the silica background and the core is created by omitting one air-hole at the center. The structure provides high degree of flexibility in the fiber design and hence tailorable modal properties. Structural dependence of transmission characteristics of the geometry is numerically investigated by using finite difference mode convergence algorithm. The wavelength responses of fiber parameters, such as effective refractive index, chromatic dispersion, mode-effective area, and nonlinear coefficient of the structure are systematically investigated. Besides, effective V-parameter and single-mode operation of the fiber are also evaluated and discussed. The simulation results show the possibility of large negative dispersion and dispersion flattened nature of the geometry.</jats:p>

High birefringence and near‐zero dispersion control of nonlinear photonic crystal fibers with a double‐cladded coaxial core

“…Optical communications especially have contributed human kind to interact with each other more safely and conveniently. 1,2 As a promising solution in modern society, the optical fiber has been applied not only to communication systems but also to a variety of sensors or high optical power deliveries as in laser systems. [3][4][5][6] Accordingly, one of the major trends in optical fiber science is to be able to accommodate and obtain appropriate fibers with polarization maintaining (PM), which enables to preserve the polarization state of the source input light beam to match with the state of the output beam under stable condition, as in fiber optic gyroscope, interferometric fiber sensing, and optical long-distance coherent communication systems.…”

“…5,6 Also, chromatic dispersion characteristics for those optical fiber applications are imperatively necessary to be optimized and managed to incorporate a near-zero dispersion at the operating wavelength in terms of avoiding the catastrophic build-up of spurious waves, because these are considered as major sources of signal degradation. 2 During recent past decades, to achieve those goals, photonic crystal fibers (PCFs) have been extensively investigated 3,7 because of unique transmission properties that cannot be easily achieved from conventional step and graded index fibers. Here an artificial photonic crystal can be formed by modulating the relative refractive permittivity of a material with an appropriately-designed repeating pattern in space.…”

“…Ever increasing demands for data transmission through optical fibers at higher rates and over longer distances have motivated scientists and researchers all over the practical world to explore and develop light‐wave communication components that could handle more and more information. Optical communications especially have contributed human kind to interact with each other more safely and conveniently 1,2 . As a promising solution in modern society, the optical fiber has been applied not only to communication systems but also to a variety of sensors or high optical power deliveries as in laser systems 3–6 .…”

“…Accordingly, one of the major trends in optical fiber science is to be able to accommodate and obtain appropriate fibers with polarization maintaining (PM), which enables to preserve the polarization state of the source input light beam to match with the state of the output beam under stable condition, as in fiber optic gyroscope, interferometric fiber sensing, and optical long‐distance coherent communication systems 5,6 . Also, chromatic dispersion characteristics for those optical fiber applications are imperatively necessary to be optimized and managed to incorporate a near‐zero dispersion at the operating wavelength in terms of avoiding the catastrophic build‐up of spurious waves, because these are considered as major sources of signal degradation 2 …”