The size of a DLP optical module primarily depends on the DMD size (see Figure 2-2), optical design, and illumination size. In general, optical module size increases with brightness capability. This helps devices in networks, like data centers, share data quickly. It makes sure data moves smoothly over short or long distances. Its primary function is to achieve optoelectronic conversion by converting electrical signals into optical signals and vice versa. Optical modules typically have an electrical interface on the side that connects to the inside of the system and an optical interface on the side that connects to the outside. We can measure the performance of an optical module based on its key counters. The average transmit power refers to the optical power output by the light source at the transmit end of the optical module under normal working. Initially, optical modules operated at speeds of 10G, then moved to 40G and 100G.