Optical device, optical communication equipment and optical switching system

The invention provides an optical device, optical communication equipment and an optical switching system. The optical device comprises a box body, an upper cover, an optical substrate and an optical element, wherein the optical substrate and the optical element are located in the box body. The optical substrate has an opening penetrating the thickness direction, and the optical element is fixed to the inner wall of the opening. According to the embodiment of the invention, the opening penetrating through the thickness direction is formed in the optical substrate, and the optical element is fixed on the inner wall of the opening, so that compared with the mode that the optical element is arranged on the upper surface of the optical substrate, the total thickness of the optical device can be greatly reduced, and the integration level of the optical device is improved. Besides, the optical element is fixed on the inner wall of the opening, so that the influence of deformation of the optical substrate on an opti