we measure Pressure
Fiber optic pressure sensors have become increasingly of interest for many applications utilizing automotive, medical, industrial, consumer and building devices, which depend on reliable, accurate and stable measurement operations. As more industries rely on pressure sensing to monitor their processes, the demand for this technology is greatly increasing.
In a similar way for measuring strain and temperature, an optical fiber sensor, either intrinsic or extrinsic, localized point sensing or distributed over long distances, can be applied to monitor pressure changes. Though the intrinsic optical effect is not as responsive as strain or temperature, using special fibers in combination with the right interrogation method will still allow for high sensitivities, for instance in medical applications. Usually, an extrinsic approach, combining the optical fiber sensor with a transducing mechanism, is chosen to adapt dynamic sensing ranges more effectively to a wide range of applications. Two common types of sensing pressure use optical fibers. These are the Fibre Bragg Grating (FBG) sensor and Fabry Perot Interferometer, which provides a higher sensitivity but is less suitable for distributed schemes.
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