Optimal length for refractive index sensors
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United States of America Patent
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Oct 12, 1993
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N/A
app pub date -
Aug 4, 1992
filing date -
Aug 4, 1992
priority date (Note) -
Expired
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Abstract
In a refractive index type optical sensor having a thin film metal clad on a waveguide to control leakage of light as a function of refractive index, light leakage occurs in the region where a discontinuity in refractive index occurs. A discontinuous clad with short, closely spaced segments maximizes light leakage and sensitivity over the length of the sensing region. Multiple sensing regions can be formed on a single waveguide.
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