Abstract
In this work we experimentally investigate the response time of humidity
sensors based on polymer optical fiber Bragg gratings. By the use of etching
with acetone we can control the poly (methyl methacrylate) based fiber in
order to reduce the diffusion time of water into the polymer and hence speed
up the relative wavelength change caused by humidity variations. A much
improved response time of 12 minutes for humidity decrease and 7 minutes for
humidity increase, has been achieved by using a polymer optical fiber Bragg
grating with a reduced diameter of 135 microns.
© 2011 IEEE
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