Fiber-optic sensor device and method
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United States of America Patent
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-
Nov 30, 1999
Grant Date -
N/A
app pub date -
Dec 16, 1997
filing date -
Dec 16, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
A sensor system includes an optical fiber sensor element which is connected to a light source at one end and a detector at the opposite end. The sensor element is an optical fiber which has a light transmitting core, a cladding layer surrounding the core, and an outer protective layer. The outer protective layer is removed along at least part of the length of the fiber to expose a portion of the cladding layer, and the exposed portion of the cladding layer is roughened to produce a plurality of surface scratches extending through at least part of the thickness of the cladding layer. The exposed, roughened portion of the cladding layer forms a sensor region through which light is lost from the core, and is exposed to a medium to be monitored so that the amount of light lost will be dependent on the refractive index of the medium.
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