A Review of Microfiber-Based Temperature Sensors

Talataisong, Wanvisa; Ismaeel, Rand; Brambilla, Gilberto

doi:10.3390/s18020461

Cited by 56 publications

(21 citation statements)

References 114 publications

(120 reference statements)

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“…It has been demonstrated that the sensitivity of the tapered fiber is largely determined by its geometrical parameters, especially the taper lengths and diameters [3,15,33]. The tapered region is particularly important for sensing applications as it allows maximum interaction with the surroundings, and thus it has predictable compactness and sensitivity improvement.…”

Section: Sensor Structure and Principlementioning

confidence: 99%

“…Therefore, a large variety of fiber optic temperature sensors have been envisioned and demonstrated for accurate temperature measurement. The sensitive structures include the fiber Bragg grating (FBG) [5][6][7], long period fiber grating (LPFG) [8], Fabry-Perot cavity [9][10][11], Mach-Zehnder interferometer [12][13][14], microfiber-based structures [3,15], etc.…”

Section: Introductionmentioning

confidence: 99%

“…As for sensitivity-intensified fiber structures, a tapered fiber region exposes more contacting areas to the ambient and enhances the evanescent field, thus improving the sensitivity to external parameters more than conventional non-tapering optical fiber, which is very important for achieving heat monitoring and control more precisely and efficiently [15,[29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

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A Temperature Fiber Sensor Based on Tapered Fiber Bragg Grating Fabricated by Femtosecond Laser

et al. 2018

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A temperature fiber sensor based on tapered fiber Bragg grating (tapered FBG) fabricated by femtosecond laser has been proposed and realized with good reproducibility. Firstly, the fiber taper with 25 μm diameter and 1000 μm length is fabricated by arc-discharge elongation using two standard single-mode fibers. Secondly, two first-order FBGs are fabricated in tapered and non-tapered fiber regions for comparison. Both FBGs are point-by-point direct-written by femtosecond laser, and the grating lengths are 1000 μm. Thirdly, a temperature experiment is performed using a heating chamber, and experimental results show that in the range of 30~350 °C, the temperature sensitivity of the tapered FBG has increased from 11.0 pm/°C to 12.3 pm/°C. The tapered FBG proposed here can be further configured for sensing other parameters in physical, chemical, and biomedical applications.

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Section: Sensor Structure and Principlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Temperature Fiber Sensor Based on Tapered Fiber Bragg Grating Fabricated by Femtosecond Laser

et al. 2018

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“…Among the various types of optical fiber sensors, tapered optical microfiber sensors have continued to receive considerable attention, given their additional advantages of high sensitivity and miniature size [10]. The fabrication of a tapered optical microfiber is performed by simultaneously heating and pulling a section of an optical fiber into microscale diameter [11].…”

Section: Introductionmentioning

confidence: 99%

Wavelength Dependent Graphene Oxide-Based Optical Microfiber Sensor for Ammonia Gas

Girei

Alkhabet

Kamil

et al. 2021

Sensors

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Ammonia detection in ambient air is critical, given its implication on the environment and human health. In this work, an optical fiber tapered to a 20 µm diameter and coated with graphene oxide was developed for absorbance response monitoring of ammonia at visible (500–700 nm) and near-infrared wavelength regions (700–900 nm). The morphology, surface characteristics, and chemical composition of the graphene oxide samples were confirmed by a field emission scanning electron microscope, an atomic force microscope, X-ray diffraction, and an energy dispersion X-ray. The sensing performance of the graphene oxide-coated optical microfiber sensor towards ammonia at room temperature revealed better absorbance response at the near-infrared wavelength region compared to the visible region. The sensitivity, response and recovery times at the near-infrared wavelength region were 61.78 AU/%, 385 s, and 288 s, respectively. The sensitivity, response and recovery times at the visible wavelength region were 26.99 AU/%, 497 s, and 192 s, respectively. The selectivity of the sensor towards ammonia was affirmed with no response towards other gases.

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“…Existing polymer optical sensors mainly include the metal surface plasmon waveguide sensor [4,5,6], the Mach–Zehnder (M–Z) waveguide sensor [7,8], and the optical fiber stress sensor [9,10]. Currently, sensing temperature [11,12,13,14] and antibody antigens [15,16,17] is widespread in the organism-sensing field. Many optical sensors are capable of these functions, of which the majority are based on M–Z optical waveguide.…”

Section: Introductionmentioning

confidence: 99%

A Polymer Asymmetric Mach–Zehnder Interferometer Sensor Model Based on Electrode Thermal Writing Waveguide Technology

Lin¹,

Yi²,

Cao³

et al. 2019

Micromachines

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This paper presents a novel electrode thermal writing waveguide based on a heating-induced refractive index change mechanism. The mode condition and the electrode thermal writing parameters were optimized, and the output patterns of the optical field were obtained in a series of simulations. Moreover, the effect of various adjustments on the sensing range of the nanoimprint M–Z temperature sensor was analyzed theoretically. A refractive index asymmetry Mach–Zehnder (M–Z) waveguide sensor with a tunable refractive index for a waveguide core layer was simulated with a length difference of 946.1 µm. The optimal width and height of the invert ridge waveguide were 2 μm and 2.8 μm, respectively, while the slab thickness was 1.2 μm. The sensing accuracy was calculated to range from 2.0896 × 104 to 5.1252 × 104 in the 1.51–1.54 region. The sensing fade issue can be resolved by changing the waveguide core refractive index to 0.001 via an electrode thermal writing method. Thermal writing a single M–Z waveguide arm changes its refractive index by 0.03. The sensor’s accuracy can be improved 1.5 times by the proposed method. The sensor described in this paper shows great prospects in organism temperature detection, molecular analysis, and biotechnology applications.

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A Review of Microfiber-Based Temperature Sensors

Cited by 56 publications

References 114 publications

A Temperature Fiber Sensor Based on Tapered Fiber Bragg Grating Fabricated by Femtosecond Laser

A Temperature Fiber Sensor Based on Tapered Fiber Bragg Grating Fabricated by Femtosecond Laser

Wavelength Dependent Graphene Oxide-Based Optical Microfiber Sensor for Ammonia Gas

A Polymer Asymmetric Mach–Zehnder Interferometer Sensor Model Based on Electrode Thermal Writing Waveguide Technology

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