Wavelength division multiplexing and de-multiplexing optical assembly

The invention is applicable to the technical field of optical communication, and provides a wavelength division multiplexing and de-multiplexing optical assembly. A wavelength division multiplexing light emitting assembly comprises an electrical interface, a ceramic circuit board, a laser chipset, a backlit monitoring chipset, an AWG chip, a pin assembly with an optical fiber array head, a PCB, and a sealing cover plate, wherein the laser chipset and the backlit monitoring chipset are mounted on the ceramic circuit board. Specifically, the pin assembly with an optical fiber array head includes an optical fiber array head, an optical fiber and an adapter assembly; the optical fiber array head is coupled to the output port of the AWG chip; the sealing cover plate is provided with a groove; the adapter assembly is arranged outside the sealing cover plate; and the optical fiber between the adapter assembly and the optical fiber array head is embedded into the groove, and the gap between the groove and the optical fiber is filled with sealant. According to the embodiments of the invention, the uniquely designed pin assembly with an optical fiber array head is adopted based on an optical port, and welding of the optical port and a tube shell and light loss caused by deviation after welding are avoided.