High-sensitivity double-parameter sensor based on the fibre-tip Fabry–Pérot interferometer

Ge, Meng; Li, Yan; Han, Yuhui; Xia, Zehua; Guo, Zhongyi; Gao, Jianmin; Qu, Shiliang

doi:10.1080/09500340.2016.1252437

Cited by 18 publications

(16 citation statements)

References 19 publications

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“…The wavelength shifts result from the change the TOC and CTE of the polymer with temperature, which are responsible to the change of the optical path at the interface. Obviously the optical path determines the reflective spectrum from Equation (3) [43,44]. The changes in RI and coating thickness created a large optical path and led to a large phase difference at the interface.…”

Section: Resultsmentioning

confidence: 99%

“…Consequently, the optical path could be notably changed for the sensor with thin coating, and results display a higher wavelength shift than that of the sensor with a thick coating of PS. The flat and thin coating is responsible for most of the r 2 being recoupled to the core of the fiber [33,44,45]. Specifically, due to the introduction of PS polymer, which has high TOC and large RI in the 1550 nm wavelength window, the developed sensors could demonstrate high sensitivity, large dynamic range, and high temperature resolution.…”

Section: Resultsmentioning

confidence: 99%

“…The PS coated Fabry-Perot interferometer temperature sensor shows higher sensitivity than those of the Fabry-Perot interferometer with PVA, NOA-61, and PVC due to the considerably higher thermo-optic characteristics of the PS. It is noted that the sensitivities of the intrinsic Fabry-Perot interferometer are higher than those of extrinsic Fabry-Perot interferometer sensors [23,43,44]. However, the fabrication process of intrinsic Fabry-Perot interferometer sensors is complicated and requires expensive techniques.…”

Section: Resultsmentioning

confidence: 99%

“…The microfiber fabrication requires the modern glass processing machine (Vytran GPX -3400, Pittsfield, USA) for controlling the geometry and the dimensions of the fiber [23]. The fabrication of double polymer coated Fabry-Perot interferometer needs the step-curing ultraviolet photoresist (SU-8) technique for uniform and thin coating [44]. On the other hand, the extrinsic Fabry-Perot interferometer with a PS coating demonstrating high sensitivity was obtained by the simple dip coating method, which does not require expensive instruments and techniques.…”

Section: Resultsmentioning

confidence: 99%

See 3 more Smart Citations

Enhancing Temperature Sensitivity of the Fabry–Perot Interferometer Sensor with Optimization of the Coating Thickness of Polystyrene

Salunkhe

Lee

et al. 2020

Sensors

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The exploration of novel polymers for temperature sensing with high sensitivity has attracted tremendous research interest. Hence, we report a polystyrene-coated optical fiber temperature sensor with high sensitivity. To enhance the temperature sensitivity, flat, thin, smooth, and air bubble-free polystyrene was coated on the edge surface of a single-mode optical fiber, where the coating thickness was varied based on the solution concentration. Three thicknesses of the polystyrene layer were obtained as 2.0, 4.1, and 8.0 μm. The temperature sensor with 2.0 μm thick polystyrene exhibited the highest temperature sensitivity of 439.89 pm °C−1 in the temperature range of 25–100 °C. This could be attributed to the very uniform and thin coating of polystyrene, along with the reasonable coefficient of thermal expansion and thermo-optic coefficient of polystyrene. Overall, the experimental results proved the effectiveness of the proposed polystyrene-coated temperature sensor for accurate temperature measurement.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Enhancing Temperature Sensitivity of the Fabry–Perot Interferometer Sensor with Optimization of the Coating Thickness of Polystyrene

Salunkhe

Lee

et al. 2020

Sensors

View full text Add to dashboard Cite

show abstract

“…To overcome this problem, polymers started to be implemented. Polymer FPIs can attain temperature sensitivities that are one order of magnitude higher due to their high thermal expansion coefficient [10,11].…”

Section: Introductionmentioning

confidence: 99%

Multimode Fabry–Perot Interferometer Probe Based on Vernier Effect for Enhanced Temperature Sensing

Gomes

Becker

Dellith

et al. 2019

Sensors

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New miniaturized sensors for biological and medical applications must be adapted to the measuring environments and they should provide a high measurement resolution to sense small changes. The Vernier effect is an effective way of magnifying the sensitivity of a device, allowing for higher resolution sensing. We applied this concept to the development of a small-size optical fiber Fabry–Perot interferometer probe that presents more than 60-fold higher sensitivity to temperature than the normal Fabry–Perot interferometer without the Vernier effect. This enables the sensor to reach higher temperature resolutions. The silica Fabry–Perot interferometer is created by focused ion beam milling of the end of a tapered multimode fiber. Multiple Fabry–Perot interferometers with shifted frequencies are generated in the cavity due to the presence of multiple modes. The reflection spectrum shows two main components in the Fast Fourier transform that give rise to the Vernier effect. The superposition of these components presents an enhancement of sensitivity to temperature. The same effect is also obtained by monitoring the reflection spectrum node without any filtering. A temperature sensitivity of -654 pm/°C was obtained between 30 °C and 120 °C, with an experimental resolution of 0.14 °C. Stability measurements are also reported.

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Double helix microfiber coupler enhances refractive index sensing based on Vernier effect

Chen

Zhang

et al. 2020

Optical Fiber Technology

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High-sensitivity double-parameter sensor based on the fibre-tip Fabry–Pérot interferometer

Cited by 18 publications

References 19 publications

Enhancing Temperature Sensitivity of the Fabry–Perot Interferometer Sensor with Optimization of the Coating Thickness of Polystyrene

Enhancing Temperature Sensitivity of the Fabry–Perot Interferometer Sensor with Optimization of the Coating Thickness of Polystyrene

Multimode Fabry–Perot Interferometer Probe Based on Vernier Effect for Enhanced Temperature Sensing

Double helix microfiber coupler enhances refractive index sensing based on Vernier effect

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