Temperature insensitive fiber optical refractive index probe with large dynamic range at 1,550 nm

Zhou, Fengfeng; Su, Huaizhi; Joe, Hang-Eun; Jun, Martin B. G.

doi:10.1016/j.sna.2020.112102

Cited by 16 publications

(7 citation statements)

References 49 publications

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“…Due to the physical absorption/adsorption of ethanol molecules, the sensing layer generally changes one or more of its physical properties (e.g., thickness or volume) or optical properties (e.g., RI) causing a change in optical path length experienced by different wavelengths and, hence, a phase shift in the output spectrum. However, interferometric techniques have also been explored without any sensing film with promising outcomes [ 36 , 67 , 68 , 69 ]. A schematic diagram of a multimode–singlemode–multimode (MSM) sensor is shown in Figure 6 .…”

Section: Optical Fibre Sensing Methodsmentioning

confidence: 99%

“…A linear response was observed in the 30% to 70% ethanol–water concentration range, as shown in Figure 9 c, with a sensitivity of 28 nm/vol or 592.8 nm/RIU. Recently, Zhou et al proposed a Michelson Interferometer optical fibre probe for RI measurement, where the main highlight was the capability of temperature compensation of liquids during the RI measurement [ 69 ]. Zhou et al developed a cavity using femtosecond laser machining located very close to the end of a cleaved fibre tip.…”

Section: Optical Fibre Sensing Methodsmentioning

confidence: 99%

“…However, temperature cross-sensitivity and/or cross-sensitivity caused by other chemical species in the measurand solution are also significant issues. Some researchers have formulated techniques to mitigate temperature cross-sensitivity, including an inline C-shaped open-cavity FPI [ 68 ], a combination of FP cavity and Michelson interferometry [ 69 ], micro grooved FBG [ 42 ], a combination of FBG and LPG for simultaneous temperature and RI measurement [ 37 ] and etched FBGs [ 84 ]. Cross-sensitivity due to other chemicals can be minimised or avoided by improving the selectivity of sensors and some work has also been reported for improving selectivity by modifying POF with CNTs [ 56 ], by combining interferometric and LSPR techniques [ 72 ] and by using ethanol-selective enzymes [ 94 ].…”

Section: Current Status and Future Prospects Of Optical Fibre Ethanol...mentioning

confidence: 99%

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A Review of Optical Fibre Ethanol Sensors: Current State and Future Prospects

Memon

Wang

Strunz

et al. 2022

Sensors

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A range of optical fibre-based sensors for the measurement of ethanol, primarily in aqueous solution, have been developed and are reviewed here. The sensing approaches can be classified into four groups according to the measurement techniques used, namely absorption (or absorbance), external interferometric, internal fibre grating and plasmonic sensing. The sensors within these groupings can be compared in terms of their characteristic performance indicators, which include sensitivity, resolution and measurement range. Here, particular attention is paid to the potential application areas of these sensors as ethanol production is globally viewed as an important industrial activity. Potential industrial applications are highlighted in the context of the emergence of the internet of things (IoT), which is driving widespread utilization of these sensors in the commercially significant industrial and medical sectors. The review concludes with a summary of the current status and future prospects of optical fibre ethanol sensors for industrial use.

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Section: Optical Fibre Sensing Methodsmentioning

confidence: 99%

Section: Optical Fibre Sensing Methodsmentioning

confidence: 99%

Section: Current Status and Future Prospects Of Optical Fibre Ethanol...mentioning

confidence: 99%

See 1 more Smart Citation

A Review of Optical Fibre Ethanol Sensors: Current State and Future Prospects

Memon

Wang

Strunz

et al. 2022

Sensors

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“…For this, the mode properties of this SNORW structure is studied and analyzed by using full-vectorial finite element method. The wavelength chosen for this analysis is 1550nm, which is mostly used wavelength in all types of optical communication scenarios [41]. The refractive index used for SiO2 and Si at 1550nm wavelength is calculated through Sellmeier's equation as 1.444 [9], [42] and 3.4752 [43], respectively.…”

Section: Numerical Simulationmentioning

confidence: 99%

Analytical Prediction for Quasi-TE mode in Silicon Nanowire Optical Rectangular Waveguide

Singh

Priye

2021

Preprint

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Theoretical and numerical mode estimation performed on Silicon Nanowire Optical Rectangular Waveguide (SNORW) is presented for on-chip communication in photonic integrated circuits. The propagation behavior of electric and magnetic fields is investigated, where zeroth order mode is found dominating inside the nanoslot region of SNORW for the circularly symmetric quasi-TE mode to propagate. This SNORW structure supports hybrid mode, which derives its behavioral root from the rectangular waveguide and functional root from the slot waveguide. In periodic silicon nanowire-based waveguide, it is found that the envelope of mode field intensity closely matches with rectangular waveguide and the guiding properties closely matches with slot waveguide. The type of mode is analyzed by full vectorial Finite Element Method (FEM) and the analytical expression is derived using Effective Index Method (EIM). Analytical expressions are used to express Quasi-TE mode in term of material profile and waveguide physical parameters. The results obtained for SNORW in S, C and L wavelength bands are compared with the earlier reported work on slot waveguide, and the field intensity obtained with the theoretical equations is also compared with that of FEM results.

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“…As a result of being almost insensitive to temperature, this sensor could measure SRI effectively [9]. Zhou et al reported a microstructural SRI probe with negligible temperature crosstalk, which could transform the measured wavelength shift into SRI using the calibrated data without any modification [10]. As noted above, both of them are slightly sensitive to temperature and then bring negligible cross-talk between RI and temperature, as well as involving relatively complex fabrication process.…”

Section: Introductionmentioning

confidence: 99%