Fiber ringdown pressure/force sensors
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United States of America Patent
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Jul 10, 2007
Grant Date -
May 19, 2005
app pub date -
Oct 8, 2004
filing date -
Oct 8, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A novel fiber ringdown (FRP) pressure sensor is provided for measuring extremely high pressures under extreme environmental conditions of cold and heat. Pressure measurements are achieved in a time domain by measuring ringdown times of emitted light through the fiber optic loop of the device. The novel FRP sensor can include a light source, such as a diode laser light source, two 2.times.1 fiber couplers, a section of fused silica single mode fiber, a photodetector, and an electronic control. The novel FRP sensor's performance in the areas of stability, reproducibility, dynamic range, and temperature tolerance are far above those of conventional sensors.
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