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01-11-2017 | Issue 11/2017

Optical and Quantum Electronics 11/2017

A dual-core PCF polarization splitter with five elliptical air holes based on tellurite glass

Journal:
Optical and Quantum Electronics > Issue 11/2017
Authors:
Feng-tao He, Wen-juan Shi, Zhan-qiang Hui, Fei Zhan, You-kun Zhang

Abstract

A new kind of dual-core photonic crystal fiber polarization splitter based on tellurite glass is designed by introducing five elliptical air holes and octagonal lattice into the polarization splitter. The full vector finite element method and coupled-mode theory are used to study its characteristics. The structure parameters are optimized through the study of all parameters in the split structure. The results show that a polarization splitter with a short length of 105.156 μm can completely separate the two beams of polarization lights. And at the wavelength of 1.550 μm the extinction ratio can reach 124.920 dB. Meanwhile, the bandwidth is 165 nm when the extinction ratio is more than 20 dB and the wavelength range is from 1.467 to 1.632 μm, which covers the S + C + L wavelength bands. The bandwidth is 448 nm when the extinction ratio is more than 10 dB and the wavelength range is from 1.322 to 1.770 μm. The polarization splitter has a short length and a high extinction ratio and a wide bandwidth, which can be widely applied in large-capacity and integrated optical communication systems.

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