Chromatic Dispersion of an Optical Fiber Based on Photonic Quasicrystals with Twelve-Fold Symmetry and its Application as Directional Coupling

Project and Analysis of Quasi-Periodic PBG for Microstrip Antenna

“…They are characterized by a very unusual alignment of the atoms and contain aperiodic structures, i.e., which have at least two different symmetrical patterns, also forming a structure without gaps, but not repeated regularly. Thus, due to these circumstances, it can cause symmetry 6, 8, 10 and 12-fold, based on the number of repetitions of the standard PQC cell [18]- [20].…”

Analysis of Hexagonal Photonic Crystal Fiber Using the Golden Ratio

“…Index-guiding fiber has a core made of a single material such as silicon dioxide, also known as silica material; surrounded by air holes running along the fiber. It has advantages over the conventional optical fiber; with numerous attractive properties such as wide single mode range [4], [5]; large effective area [6]; large negative dispersion [7], [8]; high nonlinear coefficient [9], [10]; wide bandwidth [11]; birefringence [12], [13;] near zero and flattened dispersion [14], [15]; low attenuation [16] and so on. Various designs for photonic crystal fiber have been introduced in the literatures [14], [15].…”

“…It has advantages over the conventional optical fiber; with numerous attractive properties such as wide single mode range [4], [5]; large effective area [6]; large negative dispersion [7], [8]; high nonlinear coefficient [9], [10]; wide bandwidth [11]; birefringence [12], [13;] near zero and flattened dispersion [14], [15]; low attenuation [16] and so on. Various designs for photonic crystal fiber have been introduced in the literatures [14], [15]. Photonic quasicrystal fiber with twelve fold symmetry and three cores, is introduced in [14]; exhibiting low chromatic dispersion of between 22.1 and 23.01 ps/km.nm, but with no mention of confinement loss.…”

“…Various designs for photonic crystal fiber have been introduced in the literatures [14], [15]. Photonic quasicrystal fiber with twelve fold symmetry and three cores, is introduced in [14]; exhibiting low chromatic dispersion of between 22.1 and 23.01 ps/km.nm, but with no mention of confinement loss. In [15], ultra-flattened near zero dispersion is obtainable; albeit with high confinement loss, from the hexagonal PCF design with varying air holes diameter.…”

“…In [15], ultra-flattened near zero dispersion is obtainable; albeit with high confinement loss, from the hexagonal PCF design with varying air holes diameter. Complex designs are used in both PCFs [14], [15]; making fabrication processes difficult. The principle of golden ratio may be used to make the fibre structurally stronger.…”