High dynamic range fiber optic relative humidity sensor

Rajeev Jindal; Shiquan Tao; Jagdish Prasad Singh; Parikshit Gaikwad

doi:10.1117/1.1465429

1 May 2002 High dynamic range fiber optic relative humidity sensor

Rajeev Jindal, Shiquan Tao, Jagdish Prasad Singh, Parikshit Gaikwad

Optical Engineering, Vol. 41, Issue 5, (May 2002). https://doi.org/10.1117/1.1465429

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.

©(2002) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Rajeev Jindal, Shiquan Tao, Jagdish Prasad Singh, and Parikshit Gaikwad "High dynamic range fiber optic relative humidity sensor," Optical Engineering 41(5), (1 May 2002). https://doi.org/10.1117/1.1465429

Published: 1 May 2002

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