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Appl Opt. 2010 Nov 10;49(32):6207-12. doi: 10.1364/AO.49.006207.

Bending loss of elliptical-hole core circular-hole holey fibers bent in arbitrary bending directions.

Author information

  • 1Department of Photonics System Technology, Chitose Institute of Science and Technology, Chitose, 066-8655 Japan. megu@ieee.org


A holey fiber having a core with an elliptical-hole lattice structure, which is referred to as an elliptical-hole core circular-hole holey fiber (EC-CHF), can be easily designed as a single-polarization fiber by using the fundamental space-filling modes of the core and cladding lattices. However, because the guided mode in an EC-CHF has a polarization that arises from the large geometric anisotropy of the core lattice, the influence of the bending direction on the bending loss is a crucial issue for the practical implementation of EC-CHFs. Here, the bending losses of an EC-CHF bent in arbitrary angular orientations with respect to the core cross section are calculated numerically using the equivalent anisotropic step-index circular fiber model for a real EC-CHF, and the influence of the bending direction of the fiber on the bending loss is discussed.

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