1 May 2002 High dynamic range fiber optic relative humidity sensor
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Optical Engineering, 41(5), (2002). doi:10.1117/1.1465429
Abstract
We present a fiber optic relative humidity sensor. The sensor was fabricated by coating a thin polyvinyl alcohol/CoCl2 film on a 200-?m core plastic-cladding fiber; the film was deposited after removing the cladding of the fiber. It was found that bending the fiber leads to drastic changes in the response behavior. The sensor was compared against a commercially available relative humidity sensor and was found to be sensitive to relative humidity ranging from 3 to 90%. The sensor response is usually very fast, but varies at different humidity levels and has a good dynamical range. The sensor response is repeatable and fully reversible, and should be useful for monitoring relative humidity in harsh industrial environments.
Rajeev Jindal, Shiquan Tao, Jagdish Prasad Singh, Parikshit Gaikwad, "High dynamic range fiber optic relative humidity sensor," Optical Engineering 41(5), (1 May 2002). http://dx.doi.org/10.1117/1.1465429
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KEYWORDS
Humidity

Sensors

Fiber optics

Fiber optics sensors

Absorption

Cladding

High dynamic range imaging

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