Considerations for PCB Layout and Impedance Matching Design in Optical Modules

The optical module offers an effective high-speed solution for a growing telecom market. Data rates range from 155 Mbps to 6 Gbps and even up to 10 Gbps. Transmitter optical sub-assemblies (TOSAs) and laser drivers may have different resistances in a given application so the reflection could be worse if the designer does not use an impedance transfer circuit to absorb it. Additional uncertain noi