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Polarization dynamics in twisted fiber amplifiers: a non-Hermitian nonlinear dimer model

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Abstract

We study continuous-wave light propagation through a twisted birefringent single-mode fiber amplifier with saturable nonlinearity. The corresponding coupled-mode system is isomorphic to a non-Hermitian nonlinear dimer and gives rise to analytic polarization-mode dynamics. It provides an optical simulation of the semi-classical non-Hermitian Bose–Hubbard model and suggests its use for the design of polarization circulators and filters, as well as sources of polarized light.

© 2017 Optical Society of America

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