This comprehensive roadmap explores the technological evolution of optical modules over the next decade, examining the innovations in modulation techniques, photonic integration, packaging, and system architectures that will enable the exponential bandwidth growth required by AI. This comprehensive roadmap explores the technological evolution of optical modules over the next decade, examining the innovations in modulation techniques, photonic integration, packaging, and system architectures that will enable the exponential bandwidth growth required by AI. Optical modules are key transmission components in communication networks, and their applications, technologies, types, and terminology are diverse. It can be confusing for those new to the field. When discussing optical modules, what are we actually talking about? This article aims to delve into. The Printed Circuit Board (PCB) at the heart of these modules is no longer a simple substrate but a highly engineered system. Designing and producing these complex PCBs presents formidable challenges, requiring a convergence of disciplines—from high-frequency signal integrity and advanced thermal. The Development Path of Optical Modules has shaped every major stage of digital communication. Over time, this path has become clear through improvements in size, speed, modulation, and integration density. Coherent technology facilitates long-distance, high-speed transmission with exceptional signal quality. Linear drive pluggable optics (LPO).