Multilevel temperature threshold sensor based on photonic crystal fiber transducers

Marc, Pawel; Przybysz, Natalia; Stasiewicz, Karol A.; Jaroszewicz, Leszek R.

doi:10.1117/12.2262101

Cited by 1 publication

(2 citation statements)

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“…One of the most important physical effects observed in filled PCFs is a change of propagation properties when a refractive index of the filling material decreases with an increase of temperature. This effect was observed in solid and hollow core PCFs when they were infiltrated by immersing oils [3,4], liquid crystals [5,6,7], phase changing materials [8][9][10][11], nanomaterials mixtures, or nano-composites [12][13][14][15][16][17], and polymers [18,19]. Based on such PCF transducers, various sensors platforms were developed for measurement of different physical parameters [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…Phase transition is a discontinuous process and the refractive indices of these materials change discontinuously, as well. These optical properties in connection with optical properties of PCF allow to design a bi-stable optical fiber transducer [8][9][10][11] and a multi-stage temperature threshold sensor [10]. Light is able to propagate through such structure when a filling material is in a liquid state -ON state and it stops when a filling material is in a solid state -OFF state.…”

Section: Introductionmentioning

confidence: 99%

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Opto-Electronics Review

Przybysz

Marc

Tomaszewska

et al. 2020

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Thermo-optic properties enhancement of the bi-stable temperature threshold sensors based on a partially filled photonic crystal fiber was reported. Previously tested transducers filled with a selected group of pure n-alkanes had in most cases differences between switching ON and OFF states. Therefore, the modification of filling material by using additional crystallization centers in the form of gold nanoparticles was applied to minimize this undesirable effect. The evaluation of the thermodynamic properties of pentadecane and its mixtures with 14 nm spherical Au nanoparticles based on the differential scanning calorimetry measurements was presented. Optical properties analysis of sensors prepared with these mixtures has shown that they are bounded with refractive index changes of the filling material. Particular sensor switches ON before melting process begins and switches OFF before crystallization starts. Admixing next group of n-alkanes with these nanoparticles allows to design six sensors transducers which change ON and OFF states at the same temperature. Thus, the transducers with a wider temperature range for fiber-optic multithreshold temperature sensor tests will be used.

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