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Fast (optical) Links

In this write-up we focus on fast data links that read out particle detectors. This includes developments of ASICs, optical modules, identifying passive components such as fiber and connector, and a link system design. A review of the current status is provided. The goal of R\&D is to double (near term) and quadruple (longer term) the present data transmission rate for particle detectors, enabling a wide range of physics exploration and measurements.