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Proceedings Paper

LPG-based PVA coated sensor for relative humidity measurement
Author(s): T. Venugopalan; T. L. Yeo; T. Sun; K. T. V. Grattan
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Paper Abstract

A long period grating (LPG)-based optical fiber sensor, coated with polyvinyl alcohol, has been developed for relative humidity (RH) measurement over the range from 33% RH to 97% RH, for which the grating response has been monitored. The fiber optic sensor using the LPG has been designed to monitor the change in resonance loss which is then related to the humidity measured through calibration of the sensor with a series of materials of known refractive index. Results on the calibration and use of the sensor are reported and considered in this work, in light of other grating-based methods for humidity measurement.

Paper Details

Date Published: 2 July 2007
PDF: 4 pages
Proc. SPIE 6619, Third European Workshop on Optical Fibre Sensors, 661925 (2 July 2007); doi: 10.1117/12.738625
Show Author Affiliations
T. Venugopalan, City Univ. London (United Kingdom)
T. L. Yeo, City Univ. London (United Kingdom)
T. Sun, City Univ. London (United Kingdom)
K. T. V. Grattan, City Univ. London (United Kingdom)

Published in SPIE Proceedings Vol. 6619:
Third European Workshop on Optical Fibre Sensors
Antonello Cutolo; Brian Culshaw; José Miguel López-Higuera, Editor(s)

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