Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 265, Issue -, Pages 335-338Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2018.03.065
Keywords
Humidity; Fiber optic; Cellulose actuator; Fiber Bragg grating
Funding
- Intramural NIST DOC [9999-NIST] Funding Source: Medline
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We describe an intuitive and simple method for exploiting humidity-driven volume changes in carboxymethyl cellulose (CMC) to fabricate a humidity responsive actuator on a glass fiber substrate. We optimize this platform to generate a photonic-based humidity sensor where CMC coated on a fiber optic containing a fiber Bragg grating (FBG) actuates a mechanical strain in response to humidity changes. The humidity-driven mechanical deformation of the FBG results in a large linear change in Bragg resonance wavelength over the relative humidity range of 5%-40%. The measurement uncertainty over this relative humidity range is +/-2% (k = 1). Published by Elsevier B.V.
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