Each optical transceiver has its own tailored solutions according to different use case scenarios. For example: in the case of data centers, there is a demand for high density, high speed transceivers which enable quick data transfers. For long haul communication, transceivers require a low noise figure and the capability for long distance transmission. Some solutions focus on enhancing data rates using complex schemes such as PAM4 while maintaining signal quality. Optical transceiver manufacturers adapt to shifting market demands with constant improvements and shifts in strategy to provide new competitively designed solutions that optimize performance, cost, and energy consumption.