Method for controlling fiber optic sensor scale factor using amplitude modulation
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United States of America Patent
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Jul 15, 2003
Grant Date -
Feb 28, 2002
app pub date -
Jul 13, 2001
filing date -
Jul 13, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system and a method for controlling the scale factor of a fiber optic sensor are disclosed. The scale factor may be maintained at a constant level by controlling the power level of the light source based on the amplitude of a modulation superimposed on the modulator drive signal. Alternatively, scale factor may be maintained at a constant level by setting the detected signal at twice the modulator drive frequency to zero.
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