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Investigation Into Time Response of Polymer Fiber Bragg Grating Based Humidity Sensors

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3 Author(s)
Zhang, W. ; Photonics Res. Group, Aston Univ., Birmingham, UK ; Webb, D.J. ; Peng, G.

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.

Published in:

Lightwave Technology, Journal of  (Volume:30 ,  Issue: 8 )

Date of Publication:

April15, 2012

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