We observe the phenomenon of the Faraday-like effect, which occurs in periodically poled lithium niobate with odd number of domains (OPPLN) by the transverse electro-optic (EO) effect under the quasi-phase-matching condition. In this case, light rotates in the reverse sense during the forward and the backward path, and OPPLN shows a nonreciprocal process that is similar to the magneto-optical Faraday effect, which has served as a routine method for achieving optical isolation. Therefore, a feasible scheme for an EO optical isolator based on the Faraday-like effect by adding an additional semi-domain to OPPLN is also proposed in this article.
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