Suspended-core microstructured fiber for refractometric detection of liquids

Tomas Nemecek; Matej Komanec; Tomas Martan; Redwan Ahmad; Stanislav Zvanovec

doi:10.1364/AO.54.008899

Applied Optics
Vol. 54,
Issue 30,
pp. 8899-8903
(2015)
•https://doi.org/10.1364/AO.54.008899

Suspended-core microstructured fiber for refractometric detection of liquids

Tomas Nemecek, Matej Komanec, Tomas Martan, Redwan Ahmad, and Stanislav Zvanovec

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Tomas Nemecek, Matej Komanec, Tomas Martan, Redwan Ahmad, and Stanislav Zvanovec, "Suspended-core microstructured fiber for refractometric detection of liquids," Appl. Opt. 54, 8899-8903 (2015)

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Table of Contents Category
- Fiber Optic Sensors
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About this Article
History
- Original Manuscript: August 6, 2015
- Revised Manuscript: September 17, 2015
- Manuscript Accepted: September 17, 2015
- Published: October 14, 2015

Abstract

A silica suspended-core microstructured optical fiber sensor for detection of liquids, operating at 1550 nm, is analyzed. The sensing principle is based on the evanescent wave overlap into a tested analyte, which is filled via capillary forces into the cladding holes. Validations for analytes in the refractive index range of 1.35–1.43 are carried out with liquid-analyte-filling-length limits being studied both theoretically and experimentally. We prove, for the first time to our knowledge, that an extreme sensitivity of 342.86 dB/RIU and resolution of $4.4 \times 10^{- 5}$ can be achieved. This sensor represents a high-quality alternative for applications requiring a facile, low-cost solution.

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Analyte	Denomination	RI
Ethyl alcohol	ETOH	1.3520
Isopropyl alcohol	IPA	1.3738
75% IPA + 25% EG	IPA75EG	1.3861
50% IPA + 50% EG	IPA50EG	1.3970
25% IPA + 75% EG	IPA25EG	1.4086
Ethylene glycol	EG	1.4204
76% Glycerol + 24% H20	GLY76H2O	1.4269

References	RI	Sensitivity	Resolution (RIU)
[15]	1.37–1.43	28.5 μW/RIU	–
[14]	1.36–1.39	679 μW/RIU	$1.5 \times 10^{- 5}$
[12]	1.42	300/RIU	$3 \times 10^{- 6}$
[16]	1.38–1.45	300.4 dB/RIU	$3.3 \times 10^{- 5}$
[17]	1.33–1.38	110 dB/RIU	$2.2 \times 10^{- 4}$
[18]	1.33–1.441	27 dB/RI	$3.7 \times 10^{- 5}$
[19]	1.314–1.365	205 dB/RI	$5 \times 10^{- 6}$
[20]^a	1.38–1.45	1027 nm/RIU	$\sim 10^{- 7}$
[21]^a	1.320–1.325	830 nm/RIU	$2 \times 10^{- 5}$
Our SC-MOF sensor
	1.4269	1341.61 μW/RIU	$4.4 \times 10^{- 5}$
	1.4269	342.86 dB/RIU	$4.4 \times 10^{- 5}$

Analyte	Denomination	RI
Ethyl alcohol	ETOH	1.3520
Isopropyl alcohol	IPA	1.3738
75% IPA + 25% EG	IPA75EG	1.3861
50% IPA + 50% EG	IPA50EG	1.3970
25% IPA + 75% EG	IPA25EG	1.4086
Ethylene glycol	EG	1.4204
76% Glycerol + 24% H20	GLY76H2O	1.4269

References	RI	Sensitivity	Resolution (RIU)
[15]	1.37–1.43	28.5 μW/RIU	–
[14]	1.36–1.39	679 μW/RIU	$1.5 \times 10^{- 5}$
[12]	1.42	300/RIU	$3 \times 10^{- 6}$
[16]	1.38–1.45	300.4 dB/RIU	$3.3 \times 10^{- 5}$
[17]	1.33–1.38	110 dB/RIU	$2.2 \times 10^{- 4}$
[18]	1.33–1.441	27 dB/RI	$3.7 \times 10^{- 5}$
[19]	1.314–1.365	205 dB/RI	$5 \times 10^{- 6}$
[20]^a	1.38–1.45	1027 nm/RIU	$\sim 10^{- 7}$
[21]^a	1.320–1.325	830 nm/RIU	$2 \times 10^{- 5}$
Our SC-MOF sensor
	1.4269	1341.61 μW/RIU	$4.4 \times 10^{- 5}$
	1.4269	342.86 dB/RIU	$4.4 \times 10^{- 5}$

Abstract

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Applied Optics