Integrated optical circulator

An integrated optical circulator comprising at least two single-fiber bidirectional optical fiber interfaces (1), a refractive element group (2), an optical isolation element group (3) and an optical fiber array (4), wherein

• the refractive element group (2) and the optical isolation element group (3) are sequentially located on a same optical path;
• signal light input from each single-fiber bidirectional optical fiber interface (1) sequentially passes through the refractive element group (2) and the optical isolation element group (3), and then is output by a corresponding outgoing optical fiber in the optical fiber array (4);
• and
• signal light input from each incident optical fiber in the optical fiber array (4) sequentially passes through the optical isolation element group (3) and the refractive element group (2), and then is output by the corresponding single-fiber bidirectional optical fiber interface (1),
• wherein the optical isolation element group (3) comprises a first polarization beam-splitting prism (31), a first half-wave plate (32), a first Faraday rotating plate (33), a second Faraday rotating plating (34), a second half-wave plate (35), and a second polarization beam-splitting prism (36),
• wherein the first polarization beam-splitting prism (31), the first half-wave plate (32), the first Faraday rotating plate (33), the second Faraday rotating plate (34), the second half-wave plate (35) and the second polarization beam-splitting prism (36) are sequentially located on a same optical path, and signal light output by the refractive element group (2) is output to the optical isolation element group (3) through the first polarization beam-splitting prism (31), and then output to the corresponding outgoing optical fiber in the optical fiber array (4) by the second polarization splitting prism (36);
• and the signal light output by the optical fiber array (4) is output to the optical isolation element group (3) through the second polarization splitting prism (36), and is then output to the refractive element group (2) by the first polarization splitting prism (31).