Polarization-maintaining photonic crystal fibre |
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| Authors: | Lou Shu-Qin Wang Zhi Ren Guo-Bin and Jian Shui-Sheng |
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| Affiliation: | Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China |
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| Abstract: | Photonic crystal fibres (PCFs) offer new possibilities of realizing highly birefringent fibres due to a higher intrinsic index contrast compared to conventional fibres. In this paper, we analyse theoretically the modal properties of a kind of polarization-maintaining PCF, namely the elliptical hole photonic crystal fibre (EHPCF) with a central small elliptical hole introduced in the core region. We demonstrate the possibility of achieving large birefringence with zero walk-off in the single-mode regime. This PCF also exhibits unusual dispersion properties. Several hundred nanometres of ultra broadband flattened dispersion near the wavelength 1.55μm is achieved in this EHPCF with a central small hole of d_c=0.4Λ. |
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| Keywords: | photonic crystal fibre (PCF) birefringence walk-off parameter dispersion |
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