Multimode exposed core fiber specklegram sensor

Optics Letters
Thiago D CabralCristiano M B Cordeiro

Abstract

The inception of photonic crystal fibers (PCFs) allowed for unprecedented tailoring of waveguide properties for specialty sensing probes. Exposed core microstructured fibers (ECFs) represent a natural evolution of the PCF design for practical liquid and gas sensing. Until now, to the best of our knowledge, only single-mode or few-modes ECFs have been explored. In this Letter, we demonstrate a highly multimode ECF with a lateral access that extends throughout the whole length of the fiber. The ECF is operated as a fiber specklegram sensor for assessing properties of fluids and interrogated using a simple and low-cost setup. The probe exhibits a refractive index resolution and sensitivity of at least 4.6×10-4 refractive index units (RIUs) and -10.97RIU-1, respectively. A maximum temperature resolution up to 0.017°C with a -0.20∘C-1 temperature sensitivity over the 23°C-28°C range and a liquid level sensing resolution up to 0.12 mm with -0.015mm-1 sensitivity over the 0.0-50.0 mm bathed the length range in water.

References

Jan 18, 2003·Science·Philip Russell
Jul 2, 2003·Applied Optics·Yeuk L HooShuang C Ruan
Sep 4, 2006·Optics Express·Cristiano M B CordeiroDaniel S Ferreiira
Jul 9, 2007·Optics Express·Adriaan van BrakelDavid J Richardson
Sep 17, 2007·Optics Express·Felicity M CoxCristiano M B Cordeiro
Oct 1, 1996·Optics Letters·J C KnightD M Atkin
Apr 8, 2010·Optics Express·Stephen C Warren-SmithTanya M Monro
Feb 22, 2012·Optics Letters·Anna N YaroslavskyVictor Neel
Jun 30, 2012·Optics Letters·Naoyuki ShiokawaEiji Tokunaga
Mar 14, 2013·Optics Express·Brandon ReddingHui Cao
Nov 22, 2018·Applied Optics·Eric FujiwaraCarlos Kenichi Suzuki
Apr 20, 2019·Sensors·Akash BachhukaHeike Ebendorff-Heidepriem

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Citations

Jan 18, 2022·Advanced Science·Tilman A K LühderMarkus A Schmidt

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