A small integrated free space circulator, comprising a first polarization splitting prism (1), a half-wave plate (2), a Faraday rotating plate (3), a splitting prism (4), a quarter-wave plate (5) and a pair of reflective plates (6, 7); the first polarization splitting prism (1), the half-wave plate (2), the Faraday rotating plate (3) and the splitting prism (4) are provided in sequence, the quarter-wave plate (5) and the reflective plate (6) are sequentially attached to the side face of the first polarization splitting prism (1) adjacent to the half-wave plate (2), and the reflective plate (7) is provided on the side face of the splitting prism (4, 8) adjacent to or opposite to the Faraday rotating plate (3); and when the reflective plate (7) is provided on the side face of the splitting prism (8) opposite to the Faraday rotating plate (3), the reflective plate (7) partially covers the side face of the splitting prism (8) opposite to the Faraday rotating plate (3). By means of the organic combination of optical elements such as the polarization splitting prisms (1, 4), the wave plates (2, 5), the Faraday rotating plate (3), the reflective mirrors (6, 7) and the birefringent crystal (8), the device has advantages such as small volume, high integration, easy production and low cost and has a good market prospect.
展开▼
