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Design of a Polarization Splitter Based on a Dual-core Hexagonal-shaped Photonic Crystal Fiber
Subramani Jegadeesan,Muneeswaran Dhamodaran,Maria Azees,Arunachalam Murugan 한국광학회 2019 Current Optics and Photonics Vol.3 No.4
In this paper, a microstructured, hexagonal-shaped dual-core photonic crystal fiber (PCF) is proposed. The proposed structure has specific optical properties to obtain high birefringence and short coupling length, for different values of structural parameters varied over a wide range of wavelength. The properties are analyzed using a solid core of silica material. The proposed structure is implemented as a polarization splitter with splitting length of 1.9 mm and a splitting ratio of -34.988 dB, at a wavelength of 1550 nm. The obtained bandwidth in one band gap of about 81 nm. The numerical analysis ensures that the performance of the proposed polarization splitter is better than that of existing ones.
Huang, Song-Jeng,Kannaiyan, Sathiyalingam,Subramani, Murugan Techno-Press 2022 Advances in nano research Vol.13 No.4
In this study, the gravitating mechanical stir casting method was used to fabricating the Nb<sub>2</sub>O<sub>5</sub>/AZ31 magnesium matrix nanocomposites. Niobium pentoxide (Nb<sub>2</sub>O<sub>5</sub>) used as reinforcement with two different weight percentages (3 wt % and 6 wt %). The influence of Nb<sub>2</sub>O<sub>5</sub> on microstructure and mechanical properties has been investigated. The microstructure analysis showed that the composites are mainly composed of the primary α-magnesium phase and phase β-Mg<sub>17</sub>Al<sub>12</sub> secondary phase. The secondary phase was dispersed evenly along the grain boundary of the Mg phase. The Nb<sub>2</sub>O<sub>5</sub>/AZ31 nanocomposites revealed that the grain size and its lamellar shape (β-Mg<sub>17</sub>Al<sub>12</sub>) were gradually refined. Different strengthening mechanisms were assessed in terms of their contributions. Results showed that composite material properties of hardness, yield strength, and fracture study were directly related to Nb<sub>2</sub>O<sub>5</sub> as a reinforcement. The maximum values of the mechanical properties were achieved with the addition of 3 wt% Nb<sub>2</sub>O<sub>5</sub> on the AZ31 alloy.