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Opt Lett. 2007 Mar 1;32(5):469-71.

Highly birefringent elliptical-hole photonic crystal fiber with squeezed hexagonal lattice.

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  • 1Institute of Modern Optics, Nankai University, Tianjin 300071, China.


We propose a novel polarization-maintaining index-guiding photonic crystal fiber (PCF). It is composed of a solid silica core and a cladding with squeezed-hexagonal-lattice elliptical air holes. Using a full-vector finite-element method, we study the modal birefringence of the fundamental modes in such PCFs. Numerical result shows that very high modal birefringence with a magnitude of the order of 10(-2) around 1550 nm has been obtained. Furthermore, large normal dispersion appears over a wide range of wavelengths in both orthogonal polarizations.

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