Optical fiber pressure and acceleration sensor fabricated on a fiber endface
Patent 7054011 Issued on May 30, 2006. Estimated Expiration Date: 
August 5, 2024. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 5, 2024. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesOptical measuring device using a spectral modulation sensor having an optically resonant structure Method for producing reflective taps in optical fibers and applications thereof In-line fiber etalon strain sensor Patent #: 5528367 InventorsAssigneeApplicationNo. 10911635 filed on 08/05/2004US Classes:356/480, Resonant cavity65/407End to end (i.e., butt end joining)ExaminersPrimary: Toatley, Gregory J. Jr.Assistant: Lyons, Michael A. Attorney, Agent or FirmInternational ClassG01B 9/02AbstractA fiber optic sensor has a hollow tube bonded to the endface of an optical fiber, and a diaphragm bonded to the hollow tube. The fiber endface and diaphragm comprise an etalon cavity. The length of the etalon cavity changes when applied pressure or acceleration flexes the diaphragm. The entire structure can be made of fused silica. The fiber, tube, and diaphragm can be bonded with a fusion splice. The present sensor is particularly well suited for measuring pressure or acceleration in high temperature, high pressure and corrosive environments (e.g., oil well downholes and jet engines). The present sensors are also suitable for use in biological and medical applications.Other References
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