Abstract
When considering polarization in optical fiber, a distinction has to be made between the preservation of the integrity and of the direction of the polarization of the guided wave. For instance, a fiber with a perfectly circular core (1) could preserve integrity but not necessarily direction whilst a bi-refringent fiber might do both even if it were bent or twisted to some extent. A fiber which preserves integrity and direction should ideally support only a single polarized mode. This would be a simple matter with microwaves in a metal waveguide, but fibers, as dielectric guides, have no lower cut-off for the fundamental modes so that it is not possible to use the shape of the waveguide section to cut-off one fundamental mode and leave the other. See Figure (1).
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© 1982 Springer-Verlag Berlin Heidelberg
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Dyott, R.B. (1982). Elliptically Cored Polarization Holding Fiber. In: Ezekiel, S., Arditty, H.J. (eds) Fiber-Optic Rotation Sensors and Related Technologies. Springer Series in Optical Sciences, vol 32. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-39490-7_19
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DOI: https://doi.org/10.1007/978-3-540-39490-7_19
Publisher Name: Springer, Berlin, Heidelberg
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