Material Selection: Standard FR4 is rarely sufficient; high-speed materials like Megtron 6/7 or Rogers are required for 100G, 400G, and 800G applications. Manufacturing Complexity: These boards often require HDI technology, rigid-flex structures, and precise wire bonding pads. Optical modules are critical components in modern communication systems, acting as the bridge between electrical and optical signals. In simple terms, they convert electrical signals from devices like routers, switches, and servers into light signals that travel through fiber optic cables. Critical Metrics: Signal integrity (insertion loss, return loss) and thermal management are the two. The Printed Circuit Board (PCB) at the heart of these modules is no longer a simple substrate but a highly engineered system. These components work together to efficiently convert and precisely transmit optical and electrical signals. Since they are used to interconnect electronic devices, optical module PCBs are designed to. optical PCB optical PCB manufacturing optical PCB assembly optical circuit board photonics PCB LiDAR PCB optical-grade PCB An optical PCB is built for systems where the circuit board interacts with light—not just electricity.