OPTICAL DEVICE, OPTICAL COMMUNICATION APPARATUS AND OPTICAL SWITCHING SYSTEM

An optical device, an optical communication apparatus and an optical switching system. The optical device comprises a box body (11), an upper cover (12), and an optical substrate (13) and optical elements (14) located in the box body (11). The optical substrate (13) has an opening (Q) penetrating in a thickness direction, and the optical elements (14) are fixed to an inner wall of the opening (Q). Comparing providing in the optical substrate (13) the opening (Q) penetrating in the thickness direction, and fixing the optical elements (14) to the inner wall of the opening (Q) to providing the optical elements (14) on an upper surface of the optical substrate (13), the total thickness of the optical device can be substantially reduced and the integration degree of the optical device can be improved. Furthermore, fixing the optical elements (14) to the inner wall of the opening (Q) can reduce the impact of the deformation of the optical substrate (13) on an optical path formed by the optical elements (14), and ca