Abstract: A wavelength selective switch, a rack, and an optical transmission device are disclosed. The wavelength selective switch includes an electrical interface connected to an optical cross-connector through a circuit and disposed on a first plane of a backplane. After the wavelength selective switch is installed onto the rack, the electrical interface is connected to a first electrical interface. The first electrical interface is included in the rack. An optical interface is connected to the optical cross-connector through an optical fiber. The optical interface is disposed on at least one of the first plane or a third plane. After the wavelength selective switch is installed onto the rack, the third plane is on a surface of the rack. When the wavelength selective switch is being installed onto the rack, a direction of a motion trajectory of the wavelength selective switch is perpendicular to the third plane.

Abstract: A housing packaging structure includes a packaging housing, a thermally conductive portion, and an electrical connector. The packaging housing is connected to the thermally conductive portion to form a sealed cavity, where the sealed cavity is configured to accommodate a signal transmission device, a thermal conductivity coefficient of the thermally conductive portion is greater than a thermal conductivity coefficient of the packaging housing, and the electrical connector runs through the packaging housing. A material with poor thermal conductive performance may be selected for the packaging housing, thereby increasing selectivity of a material for the packaging housing.

Abstract: Embodiments of this application provide an optical communication device, including a light-transmitting solid-state medium unit, and further including an input and output unit, a dispersion unit, and a switching unit that are respectively disposed on wall surfaces of the medium unit. An input port of the input and output unit inputs an optical signal into the medium unit and transmits the optical signal to the dispersion unit. The dispersion unit disperses the optical signal into a plurality of sub-beams and transmits the sub-beams to the switching unit. The switching unit deflects, in preset angles, the sub-beams respectively to form a plurality of deflected sub-beams, and enables the deflected sub-beam to be output from the medium unit and transmitted to a corresponding output port. This implements grooming and assignment of wavelengths of the optical signal. This significantly reduces sealing costs and reduces costs and a size of the optical communication device.

Abstract: An optical communication device includes a dispersion unit and a switching unit that are disposed in a cavity of a closed housing. The optical communication device further includes a monitoring unit and a drive unit. The monitoring unit may monitor in real time offsets of light spots formed on the switching unit. The drive unit can drive the switching unit based on a variation obtained by the monitoring unit, so that the switching unit compensates for the offsets of the light spots. In addition, the optical communication device may further include a dustproof and waterproof unit and a humidity control unit.