Abstract
Under the assumption of weak guidance and weak anisotropy, tapered anisotropic fibers with equal or nearly equal anisotropy in the core and cladding are discussed theoretically. This study shows that, by properly choosing the external refractive index, one of the polarized modes can be filtered by the taper in an anisotropic fiber while the other remains unaffected. Thus single-mode single-polarization operation is realized in the weakly guiding, weakly anisotropic fiber.
© 1988 Optical Society of America
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