Fiber Sensors Probe Engine
As carmakers try to reduce the harmful emissions from gasoline-powered engines, efforts focus on controlling engine performance using data from sensors. A team from
Texas A&M University in College Station and
Fiber Dynamics Inc. in Bryan, Texas, has integrated a fiber optic sensor and a spark plug to provide in-cylinder pressure information.
The researchers demonstrated sensitivities as high as 0.00339 rad/psi using the intrinsic fiber Fabry-Perot interferometer, as described in the Feb. 20 issue of
Applied Optics. Monitoring the pressure on the sensors, they employed a semiconductor laser emitting near 1300 nm to measure changes in the reflectance of the metal-coated fiber.
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