Theoretical analysis of large negative dispersion photonic crystal fiber with small confinement loss
Autor: | Himadri Shekhar Mondal, Md. Mahbub Hossain, Rekha Saha, Ahmed Saif Muntaseer, Md. Ekhlasur Rahaman |
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Rok vydání: | 2020 |
Předmět: |
Optical fiber
Materials science business.industry 01 natural sciences Atomic and Molecular Physics and Optics Finite element method law.invention 010309 optics Nonlinear system Wavelength Optics Perfectly matched layer law Lattice (order) 0103 physical sciences Boundary value problem Electrical and Electronic Engineering business Engineering (miscellaneous) Photonic-crystal fiber |
Zdroj: | Applied Optics. 59:8925 |
ISSN: | 2155-3165 1559-128X |
Popis: | Solid core circular and octagonal photonic crystal fibers (CPCF and OPCF) are proposed for analyzing different guiding properties such as dispersion, effective mode area, nonlinearity, and confinement loss from 0.8 to 2.6 µm wavelength. The proposed structures use three different types of background materials: SF10, BK7, and silica. Moreover, the fill fraction is varied by changing the diameter of the air hole where the lattice pitch is unchanged. The proposed PCFs show a high negative dispersion with low confinement loss and small effective mode area. In the proposed design, the finite element method with a perfectly matched layer absorbing boundary condition is used. At 1.8 µm wavelength with 0.6 fill fraction, the maximum negative dispersion of − 922.5 p s / ( n m . k m ) is observed for CPCF when the background material is SF10. In addition, at this particular wavelength, the confinement loss is observed to be very small. Moreover, − 560.12 p s / ( n m . k m ) dispersion is found for the similar condition at 1.55 µm wavelength. On the other hand, using BK7 as the background material, − 706.77 p s / ( n m . k m ) dispersion is found at 1.55 µm wavelength for CPCF. Results also imply that CPCF shows better performance than OPCF for a wide wavelength range. Furthermore, at 1.55 µm wavelength, silica-based glass exhibits maximum dispersion, whereas increasing wavelength flint type glass shows the similar result. Analyzing different guiding properties of PCFs has significant impact on broadband dispersion compensation applications, especially using SF10. |
Databáze: | OpenAIRE |
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