Integrated optical isolator and circulator using nonreciprocal phase shifters: a proposal

This is the authors' abstract. We don't add key points for this paper.

In this paper, we propose an integrated optical isolator and circulator using nonreciprocal phase shifters combined with Y-branch couplers or hybrid couplers. They are not used in mode coupling between orthogonally polarized waves, which leads to reduce the fabrication tolerance. We present a design example using the guide structure of YIG film and GGG substrate.