Abstract

Optical nonreciprocal devices are essential to quantum information processing and communication. We proposed a scheme for optical nonreciprocity via the nonlinear Jaynes–Cummings model in a gain cavity. In addition, the gain cavity is coupled to two fibers with different coupling strengths. In the scheme, the nonlinearity, which is induced by the interaction between a two-level quantum emitter and the cavity field, is enhanced by the cavity gain. Our calculations show that the nonlossy optical nonreciprocity is achievable with high isolation ratio in proper parameter range. Especially, the analytic method further shows the reciprocity broken by the combination of the asymmetric coupling and enhanced nonlinearity.

© 2018 Optical Society of America

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