Wavelength-multiplexed fiber optic position encoder for aircraft control systems
Glenn M. Beheim, Michael J. Krasowski, Jorge L. Sotomayor, Klaus Fritsch, Joseph M. Flatico, Richard L. Bathurst, John G. Eustace, Donald J. Anthan · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1991
NASA Lewis together with John Carroll University has worked for the last several years to develop wavelength-multiplexed digital position transducers for use in aircraft control systems. A prototype rotary encoder is being built for a demonstration program involving the control of a commercial transport''s turbofan engine. This encoder has eight bits of resolution a 90 degree range and is powered by a single LED. A compact electro-optics module is being developed to withstand the extremely hostile gas turbine environment.