Hartings, M.
, Douglass, K.
and Ahmed, Z.
(2018),
Humidity Responsive Photonic Sensor based on a Carboxymethyl Cellulose Mechanical Actuator, Sensors and Actuators B-Chemical, [online], https://doi.org/10.1016/j.snb.2018.03.065
(Accessed December 13, 2024)
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Humidity Responsive Photonic Sensor based on a Carboxymethyl Cellulose Mechanical Actuator
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Abstract
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 over the humidity range of 5 %RH (relative humidity) to 40 %RH. The measurement uncertainty over this range is only ± 2 %RH.Citation
Sensors and Actuators B-Chemical
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Journals
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Keywords
humidity, photonics, FBG, moisture, cellulose
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Created July 15, 2018, Updated April 6, 2018