VOCs Detection Based on Evanescent Wave Coupling of Dye-Coated Optical Fiber

An optimized study of tapered polymer optical fiber (POF) for measurement of different concentration of ethanol in deionized water (0.5%-3.5%) is proposed and demonstrated. This sensor operated based on evanescent wave absorption principle. The cladding of PMMA based POF is removed using organic solvents which can be used to create tapered POF. The unclad length around 1 cm and 3 cm as well as the waist diameters of POF in the range of 5 mm and 8 mm were compared for their efficiency as an ethanol sensor based on power output ratio values. Tapered POF with smaller waist diameter and longer tapered length showed higher sensitivity as ethanol sensor. Therefore, by tailoring the length and tapered diameter of POF, high sensitivity of ethanol sensor can be fabricated.

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Effect of tapered fiber structure on the PbS Nanomaterials optical fiber amplifier excited by evanescent wave

2019 18th International Conference on Optical Communications and Networks (ICOCN) ◽

10.1109/icocn.2019.8934048 ◽

2019 ◽

Author(s):

Yanhua Dong ◽

Caiyun Su ◽

Xiangping Pan ◽

Jianxiang Wen ◽

Yangyang Zhao ◽

...

Keyword(s):

Optical Fiber ◽

Evanescent Wave ◽

Fiber Amplifier ◽

Fiber Structure ◽

Tapered Fiber ◽

Optical Fiber Amplifier

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Control of evanescent wave coupling in hybrid III–V/SOI nanolaser

2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC) ◽

10.1109/cleoe.2011.5943226 ◽

2011 ◽

Author(s):

A. Bazin ◽

Y. Halioua ◽

T. Karle ◽

P. Monnier ◽

F. Bordas ◽

...

Keyword(s):

Evanescent Wave ◽

Wave Coupling ◽

Hybrid Iii

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Optimization of Fiber-Optic Evanescent Wave Spectroscopy: A Monte Carlo Approach

Applied Spectroscopy ◽

10.1366/000370209789379349 ◽

2009 ◽

Vol 63 (9) ◽

pp. 1057-1061 ◽

Cited By ~ 5

Author(s):

M. P. Mann ◽

S. Mark ◽

Y. Raichlin ◽

A. Katzir ◽

S. Mordechai

Keyword(s):

Monte Carlo ◽

Optical Fiber ◽

Electromagnetic Radiation ◽

Monte Carlo Methods ◽

Power Distribution ◽

Infrared Radiation ◽

Evanescent Wave ◽

Fiber Optic ◽

Evanescent Waves ◽

Complex Geometries

The absorbance of the evanescent waves of infrared radiation transmitted through an optical fiber depends on the geometry of the fiber in addition to the wavelength of the electromagnetic radiation. The signal can thus be enhanced by flattening the midsection of the fiber. While the dependence of the absorbance on the thickness of the midsection has already been studied and experimented upon, we demonstrate that similar results are obtained using Monte Carlo methods based simply on geometrical optics, given the dimensions of the fiber and the power distribution of the fired rays. The optimization can be extended to fibers with more complex geometries of the sensor.

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