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Researchers from The Hong Kong Polytechnic University developed a miniaturized, highly sensitive optical fiber sensor that could be used to measure small pressure changes within the body — changes as minute as 2 kilopascals (kPa). The sensor is made from a polymer called Zeonex, and its basis for operation is a fiber Bragg grating (FBG) — periodic microstructures that can be inscribed onto a fiber.
The FBG sensor is biocompatible and chemically inert. It is also not sensitive to moisture. Those qualities, said research team leader Hwa-Yaw Tam, make the device usable in various medical applications. “Our ultimate objective is to use these types of sensors to monitor various parameters — including pressure,…READ MORE