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Method and apparatus for packaging optical fiber sensors for harsh environments

United States Patent

August 9, 2005
View the Complete Patent at the US Patent & Trademark Office
A package for an optical fiber sensor having a metal jacket surrounding the sensor, and heat-shrink tubing surrounding the metal jacket. The metal jacket is made of a low melting point metal (e.g. lead, tin). The sensor can be disposed in a rigid tube (e.g. stainless steel or glass) that is surrounded by the metal jacket. The metal jacket provides a hermetic, or nearly hermetic seal for the sensor. The package is made by melting the metal jacket and heating the heat shrink tubing at the same time. As the heat-shrink tubing shrinks, it presses the low melting point metal against the sensor, and squeezes out the excess metal.
Pickrell; Gary (Blacksburg, VA), Duan; Yuhong (Dekalb, IL), Wang; Anbo (Blacksburg, VA)
Virgina Tech Intellectual Properties, Inc. (Blacksburg, VA)
10/ 689,552
October 21, 2003
STATEMENT OF GOVERNMENT INTEREST This invention was made with government support under Contract Number DE-FT26-98BC15167 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.