Fiber Optics for Aircraft Engine Controls

Fiber optic sensors are uniquely suited to reliable operation in the very high temperature, radiation, and electromagnetic interference (EMI) environments experienced by turbine engine controls. Discussed are the fundamental physical characteristics of fiber optic sensor technology, including EMI immunity, lightweight and small size, high temperature and radiation tolerance, flexibility, stability and durability. Principles of operation for fiber optic sensors and systems are discussed, including basic design principles, extrinsic vs. intrinsic sensing, and typical fiber optic links. A discussion of the state of the art and application provides the status of development and outlook for various fiber optic sensor types (pressure, temperature, etc.) for the defined applications. The paper finishes with conclusions, highlighted payoffs and a technology roadmap.