Numerical analysis of birefringence and coupling length on dual-core photonics crystal fiber with complex air holes |
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Authors: | Huimei He Li Wang |
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Institution: | 1. College of Applied Sciences, Beijing University of Technology, Beijing 100124, China;2. College of Science, Beijing University of Chemical Technology, Beijing 100029, China |
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Abstract: | A type of high birefringence dual-core photonic crystal fibers (DC-PCFs) with a central row of elliptical air holes have been proposed. The transverse electric field vector distributions of the two modes are evaluated, the birefringence or coupling length with the different parameters is numerically analyzed based on finite-element method. The numerical results show values for the birefringence of 8.247 × 10−3 (for wavelength, λ = 1.5 μm and lattice length, Λ = 1.3 μm), and for the coupling lengths about 3.1 mm and 2.6 mm (λ = 1.5 μm and Λ = 1.5 μm) to modes of x and y polarized, respectively. With the increasing of the air-filling fraction in proposed DC-PCF, the coupling length becomes longer and the birefringence becomes higher. |
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Keywords: | Dual-core photonic crystal fibers Birefringence Coupling length |
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