10 February 2011 Microstructured fiber with high-birefringence and low mode field non-circularity
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A novel design of polarization-maintaining microstructured fiber is presented. A solid core is surrounded by two or more concentric rings of holes of constant diameter. The distance between adjacent holes in the first ring is constant except for one or two pairs of holes, for which the spacing is increased. It is found that the fiber of such a design can demonstrate high birefringence (up to 5x10-3) and simultaneously low azimuthal asymmetry of the mode shape. An experimental sample was fabricated. The measured value of birefringence is in excellent agreement with the calculated one. The results of the h-parameter measurement demonstrate the capability of the novel fiber to maintain the polarization state of the guided light along the fiber length.
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Alexander N. Denisov, Andrey E. Levchenko, Sergei L. Semjonov, and Evgeniy M. Dianov "Microstructured fiber with high-birefringence and low mode field non-circularity", Proc. SPIE 7914, Fiber Lasers VIII: Technology, Systems, and Applications, 79142G (10 February 2011); doi: 10.1117/12.874619; https://doi.org/10.1117/12.874619

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