Efficient humidity sensor based on an etched no-core fiber coated with copper oxide nanoparticles

Huda Alsweefe; Sarah Kadhim Al-Hayali; Abdul Hadi  M. Al-Janabi

doi:10.1117/1.JNP.12.046018

11 December 2018 Efficient humidity sensor based on an etched no-core fiber coated with copper oxide nanoparticles

Huda Alsweefe, Sarah Kadhim Al-Hayali, Abdul Hadi M. Al-Janabi

Author Affiliations +

Journal of Nanophotonics, Vol. 12, Issue 4, 046018 (December 2018). https://doi.org/10.1117/1.JNP.12.046018

Abstract

We report on a humidity sensor based on passband spectrum resulting due to self-imaging effect in single-mode–multimode–single-mode fiber structure experimentally. The sensor performance with varying NCF diameter was investigated to find appropriate size of maximized evanescent fields. Different tuned diameters of NCF of 100, 80, 60, and 40 μm were obtained by chemical etching process based on hydrofluoric (HF) acid immersion. The experimental results reveal that almost a threefold increase in sensitivity was obtained at the proposed optimum NCF diameter of 60 μm coated with copper oxide nanoparticles embedded in poly polyvinyl alcohol. The highest wavelength and intensity sensitivity of −0.581 nm / RH % and −0.456 dB / RH % were obtained, respectively, in the RH range of 30% to 100% with 8.11-s response time. To the best of our knowledge, this is the first demonstration of RH sensor based on NCF coated with CuO NPs thin film.

Citation Download Citation

Huda Alsweefe, Sarah Kadhim Al-Hayali, and Abdul Hadi M. Al-Janabi "Efficient humidity sensor based on an etched no-core fiber coated with copper oxide nanoparticles," Journal of Nanophotonics 12(4), 046018 (11 December 2018). https://doi.org/10.1117/1.JNP.12.046018

Received: 6 July 2018; Accepted: 16 November 2018; Published: 11 December 2018

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