Data buses take flight

摘要

High reliability is required for military avionics applications, and this offers a challenge when designing avionics fiber-optic (AFO) data buses. In this article, we discuss feasible design methods for implementing the reliable MIL STD 1773 data buses that use mature optoelectronic devices To guarantee reliable data transmission over the data bus, we present three efficient modulation techniques that can be used to reduce the complexity of optical transceivers and the processing time at each receiver, compared with using the modulation Yu-De A scheme recommended by MIL-STD-1773. We will also describe the design of electro-optic active couplers for AFO data buses and present the design consideration of AFO transmitters and a wavelength-division-multiplexing scheme.