Abstract
Dispersion causes optical pulses broadening and must be compensated for in long-distance high-speed optical data transmission systems. We investigate optical properties of micro structured fiber with 5-fold symmetric quasicrystal lattice of air-holes in a silica matrix for the first time. Dual-Concentric core Photonic Quasicrystal Fiber (DC-PQF) lattices with varying hole diameters were investigated and curves for the effective index, dispersion parameter and confinement losses were calculated by finite element method. For dispersion compensation purpose, we have proposed a novel 5-fold PQF with a high negative dispersion values ≈ 16,000 ps/(nm-km) could be reached for the wavelength around 1310 nm.
Highlights
The control of Chromatic Dispersion (CD) is crucial for optical networks and nonlinear applications
Single-mode fibers, used in high-speed optical networks, are subject to chromatic dispersion that causes pulse broadening depending on wavelength and Polarization Mode Dispersion (PMD) depending on polarization states (Zografopoulos et al, 2011)
It has been evident that quasi-periodic structures can give rise to unusual phenomena and desired properties like large cut off ratio for endlessly single mode operation, ultra-flat dispersion (Jianfei et al, 2013), etc., not been observed in periodic structures (Zoorob et al, 2000; Kim et al, 2007; Kim and Kee, 2009; Fleming, 1984)
Summary
The control of Chromatic Dispersion (CD) is crucial for optical networks and nonlinear applications. Single-mode fibers, used in high-speed optical networks, are subject to chromatic dispersion that causes pulse broadening depending on wavelength and Polarization Mode Dispersion (PMD) depending on polarization states (Zografopoulos et al, 2011). An optical network, operated at 1550 nm using a standard ITU G.652 fiber having chromatic dispersion of 17 ps/(nm-km) curtails to a maximum transmission distance of 60 km. Penalties incurred by chromatic dispersion can be minimized using negative Dispersion Compensating Fibers (DCF). To ensure higher negative dispersion, doped high-index core and small effective mode area are widespread in DCF designs, eventually culminating higher scattering loss and nonlinear effects. Photonic Crystal Fibers (PCF) can speculate very high negative dispersion due to high index difference between core and conformable cladding. It has been evident that quasi-periodic structures can give rise to unusual phenomena and desired properties like large cut off ratio for endlessly single mode operation, ultra-flat dispersion (Jianfei et al, 2013), etc., not been observed in periodic structures (Zoorob et al, 2000; Kim et al, 2007; Kim and Kee, 2009; Fleming, 1984)
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