Multi-parameter measurements using optical fibre long period gratings for indoor air quality monitoring

J. Hromadka; S. Korposh; M. C. Partridge; S. James; F. Davis; D. Crump; S.-W. Lee; R. P. Tatam

doi:10.1117/12.2265055

23 April 2017 Multi-parameter measurements using optical fibre long period gratings for indoor air quality monitoring

J. Hromadka, S. Korposh, M. C. Partridge, S. James, F. Davis, D. Crump, S.-W. Lee, R. P. Tatam

Author Affiliations +

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103233J (2017) https://doi.org/10.1117/12.2265055
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

An array of three long period gratings (LPGs) fabricated in a single optical fibre and multiplexed in the wavelength domain was used to measure simultaneously temperature, relative humidity (RH) and volatile organic compounds (VOCs). Each LPG sensor was designed to optimize its response to a desired measurand. The LPGs were fabricated with periods such that they operated at or near the phase matching turning point. The sensors were calibrated in the laboratory and the simultaneous measurement of the key indoor air quality parameters was undertaken in laboratory and office environments. It was demonstrated successfully that the data produced by the LPG sensor array under real conditions was in a good agreement with that produced by commercially available sensors. Further, the potential application of fibre optic sensors for VOCs detection at high levels has been demonstrated.

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J. Hromadka, S. Korposh, M. C. Partridge, S. James, F. Davis, D. Crump, S.-W. Lee, and R. P. Tatam "Multi-parameter measurements using optical fibre long period gratings for indoor air quality monitoring", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103233J (23 April 2017); https://doi.org/10.1117/12.2265055

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