Abstract
Spin (polarization) is widely used in free-space optics, while in photonic
integrated circuits (PICs), information is usually encoded in optical route. So a
practical way to connect these two encoding methods is necessary for information
communication. In this letter, an encoding convertor is designed to connect spin
encoding and route encoding. Finite element method is used to calculate the
conversion efficiency and extinction ratio of the encoding convertor and the
theoretical analyses are also given. Our protocol shows a friendly way to convert
optical spin information to route information, which will promote the compatibility
of free-space optics and PICs.
© 2014 Chinese Optics Letters
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