Ultra-miniature Fiber-optic Pressure Sensor System and Method of Fabrication

Ultra-miniature surface-mountable Fabry-Perot pressure sensor is constructed on an optical fiber which utilizes a 45 DEG angled fiber tip covered with a reflective layer which steers the optical axis of the fiber by 90 DEG . The Fabry-Perot cavity is formed on the sidewall of the fiber and a polymer-metal composite diaphragm is formed on the top of the Fabry-Perot cavity to operate as a pressure transducer. The sensor exhibits a sufficient linearity over the broad pressure range with a high sensitivity. The sensitivity of the sensor may be tuned by controlling the thickness of the diaphragm. The sensor may be used in a wide range of applications, including reliable in vivo low invasive pressure measurements of biological fluids, single sensor systems, as well as integral spatial-division-multiplexing sensor networks. Methods of batch production of uniform device-to-device Fabry-Perot pressure sensors of co-axial and cross-axial configurations are presented.

Attached files:
US 20110023617.jpg

Patents:
US 20,110,023,617

Inventor(s): YU MIAO [US]; BAE HYUNGDAE [US]; ZHANG XUMING [US]

Type of Offer: Licensing



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