Relative humidity multi-point optical sensors system based on fast Fourier multiplexing technique

A. Lopez-Aldaba; D. Lopez-Torres; C. Elosua; J.-L. Auguste; R. Jamier; P. Roy; F. J. Arregui; M. Lopez-Amo

doi:10.1117/12.2265174

23 April 2017 Relative humidity multi-point optical sensors system based on fast Fourier multiplexing technique

A. Lopez-Aldaba, D. Lopez-Torres, C. Elosua, J.-L. Auguste, R. Jamier, P. Roy, F. J. Arregui, M. Lopez-Amo

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103233L (2017) https://doi.org/10.1117/12.2265174
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

In this paper, a new multipoint optical fiber system for relative humidity measurements based on SnO₂-FP (Fabry-Pérot) sensing heads and an optical interrogator as single active device is presented and characterized. The interrogation of the sensing heads is carried out by monitoring the Fast Fourier Transform phase variations of the FP (Fabry-Pérot) interference frequencies. This method allows to multiplex several sensors with different wavelength spacing interference pattern. The sensors operate within a wide humidity range (20%–90% relative humidity) with low crosstalk between them. Five sensing heads have been measured using two different channels of the optical interrogator. The availability of four channels in the interrogator allows to multiplex a higher number of sensors, reducing proportionally the cost of each sensing point.

Citation Download Citation

A. Lopez-Aldaba, D. Lopez-Torres, C. Elosua, J.-L. Auguste, R. Jamier, P. Roy, F. J. Arregui, and M. Lopez-Amo "Relative humidity multi-point optical sensors system based on fast Fourier multiplexing technique", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103233L (23 April 2017); https://doi.org/10.1117/12.2265174

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available