PCB Design of Optical Module
In the evolution of optical modules, PCBs predominantly adopt HDI structures—whether mechanical blind-via HDI, laser blind-via HDI, or rigid-flex + HDI. The Printed Circuit Board (PCB) at the heart of these modules is no longer a simple substrate but a highly engineered system. Definition: An Optical Module PCB is the internal circuit board of a transceiver (like SFP, QSFP, or OSFP) responsible for converting electrical signals to optical signals and vice versa. Critical Metrics: Signal integrity (insertion loss, return loss) and thermal management are the two. Whether you are creating a 100-Gbps or 400-Gbps, small form-factor pluggable (SFP) module, SFP+ transceiver, XFP module, CFP, X2/XENPAK module. It consists of a photoelectric converter, driver circuit, receiver circuit, and control circuit.
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