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High-speed rotary communication links exhibit high complexity and require challenging assembly tolerances. This article investigates the use of optical wireless communications (OWC) for on-axis rotary communication scenarios. First, OWC is compared with other state-of-the-art technologies. Different realization approaches for bidirectional, full-duplex links are discussed. For the most promising approach, a monolithic hybrid transmitter-receiver lens is designed by ray mapping methodology. Ray tracing simulations are used to study the alignment-depended receiver power level and to determine the effect of optical crosstalk. Over a distance of12.5mm   , the lens achieves an optical power level at the receiver of− 16.2dBm    to− 8.7dBm    even for misalignments up to 3m m    .

Monolitic Hybrid Transmitter-Receiver Lens for Rotary On-Axis Communications