High-Sensitive Fiber Anemometer Based on Surface Plasmon Resonance Effect in Photonic Crystal Fiber

Han, Bo; Zhang, Ya‐nan; Wang, Xu; Yang, Dan; Liu, Yang; Wang, Yue

doi:10.1109/jsen.2019.2895265

Cited by 22 publications

(7 citation statements)

References 41 publications

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“…As a result, the temperature of the FBG will be decreased and the Bragg wavelength of the FBG will be blue shifted till a new dynamic thermal equilibrium is established. Based on previous studies on FBG-based hot-wire anemometers [27], we can describe the Bragg wavelength of the FBG anemometer as a function of the airflow velocity by [28] Ag…”

Section: Sensor Fabrication and Principlementioning

confidence: 99%

Sensitivity-Enhanced Hot-Wire Anemometer by Using Cladding-Etched Fiber Bragg Grating

et al. 2023

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A sensitivity-enhanced hot-wire anemometer based on a cladding-etched optical fiber Bragg grating (FBG) coated with a layer of silver film and optically heated by using a 1480 nm laser diode is demonstrated. The silver film absorbs the laser power to heat the FBG to a certain high temperature and the airflow cools down the FBG hot-wire with the cooling effect and hence the Bragg wavelength of the FBG is determined by the airflow velocity. Experimental measurement results show that the heating efficiency of the FBG hot wire is improved by 3.8 times in magnitude by etching the fiber cladding from 125 µm down to 73.4 µm, and the achieved airflow velocity sensitivities, under a laser power of 200 mW, are −3 180 pm/(m/s), −889 pm/(m/s), −268 pm/(m/s), and −8.7 pm/(m/s) at different airflow velocities of 0.1 m/s, 0.5 m/s, 1.5 m/s, and 17 m/s, respectively. In comparison, the sensitivities are only −2193 pm/(m/s), −567 pm/(m/s), −161 pm/(m/s), and −4.9 pm/(m/s) for the reference anemometer without cladding etching even at a much higher heating laser power of 530 mW. These results prove that the method by using a cladding-etched FBG to improve sensitivity of FBG-based hot-wire anemometers works and the sensitivity is improved significantly.

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Section: Sensor Fabrication and Principlementioning

confidence: 99%

Sensitivity-Enhanced Hot-Wire Anemometer by Using Cladding-Etched Fiber Bragg Grating

et al. 2023

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“…In addition to magnetic field and temperature, MC‐SPR sensors are also widely applied in the field of measuring strain or stress and other physical parameters. [ 128,147,205,206 ] In 2019, Han et al. employed PCF to propose an MC‐SPR anemometer that can resolve the cross‐sensitivity between flow rate and external strain [147] .…”

Section: Application Status Of Mc‐spr Sensorsmentioning

confidence: 99%

“…[ 128,147,205,206 ] In 2019, Han et al. employed PCF to propose an MC‐SPR anemometer that can resolve the cross‐sensitivity between flow rate and external strain [147] . Since the heating power is controlled to be constant, the temperature of the environment where the sensor is located is in a monotonic relationship with the flow rate, then the temperature‐affected property of the SPR resonance can be utilized to realize the measurement of the flow rate.…”

Section: Application Status Of Mc‐spr Sensorsmentioning

confidence: 99%

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Multichannel Fiber Optic SPR Sensors: Realization Methods, Application Status, and Future Prospects

Zhang

Han

Zhang

et al. 2022

Laser & Photonics Reviews

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Fiber optic sensors based on surface plasmon resonance (SPR) have demonstrated outstanding performance in biomedical, environmental monitoring, public safety, and other aspects, which provide powerful platforms for qualitative detection and quantitative analysis of molecular interactions. Among them, multichannel fiber optic SPR sensor has become a core tool in parallel detection scenarios due to the superiorities of compensating for nonspecific binding and environmental fluctuations and implementing multianalyte determination. The realization methods of multichannel sensing revolve around fiber microstructures, enhancement by materials, and hybrid fiber. The applications of multichannel fiber optic SPR sensors are demonstrated in sensing of liquid refractive index (RI), RI and temperature, biochemical molecules, and physical parameters. This review thoroughly analyzes and compares the structure, excitation effect, sensing performance, and the advantages and disadvantages of each type of multichannel fiber optic SPR sensor. Even though there are still some challenges, such as insufficient sensing channels and difficulty in fabrication, in their advancement, efforts in multidiscipline including developing high-performance sensitive films and innovating micro-nano fabrication processes will overcome these bottlenecks. Lastly, the future development directions of multichannel fiber optic SPR sensors from principle, structure, and material aspects are discussed.

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“…For example, fiber grating combined with the lever principle to achieve micro-strain measurement [ 9 ], a long-gauge fiber Bragg grating (FBG) strain sensor with enhanced strain sensitivity [ 10 ], or a silver-coated, 45-degree-radiated tilted fiber used for strain sensing [ 11 ], using three-dimensional (3D) printing technology to embed the FBG into a thermoplastic polyurethane filament can be effective in strain measurement [ 12 ], etc. The third type is the optical fiber surface plasmon resonance (SPR) strain sensor [ 13 , 14 , 15 , 16 ], which mainly makes the transmission light with total reflection at the fiber core and cladding interface contact with the metal film. However, the processing of this sensor is very difficult, and its repeatability is low.…”

Section: Introductionmentioning

confidence: 99%

Temperature-Compensated Multi-Point Strain Sensing Based on Cascaded FBG and Optical FMCW Interferometry

Feng

Cheng

Chen

et al. 2022

Sensors

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We proposed a novel temperature-compensated multi-point strain sensing system based on cascaded FBG and optical FMCW interferometry. The former is used for simultaneous sensing of temperature and strain, and the latter is used for position information reading and multiplexing. In the experiment, a narrow linewidth laser with continuous frequency-sweeping was used as the light source. After demodulating the beat-frequency signal, the link information of the 16 m fiber was obtained, and the measured result was identical to the actual position. The measurement accuracy reached 50.15 mm, and the dynamic range was up to 22.68 dB. Meanwhile, we completed the sensing experiments for temperature range from 20 °C to 90 °C and strain range from 0 με to 7000 με. The sensitivity of the sensing system to temperature was 10.21 pm/°C, the sensitivity and accuracy to strain were as high as 1.163 pm/με and 10 με, respectively. Finally, the measured strain and temperature values were obtained using the sensing matrix. The sensing system has important practical significance in the field of quasi-distributed strain measurement.

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High-Sensitive Fiber Anemometer Based on Surface Plasmon Resonance Effect in Photonic Crystal Fiber

Cited by 22 publications

References 41 publications

Sensitivity-Enhanced Hot-Wire Anemometer by Using Cladding-Etched Fiber Bragg Grating

Sensitivity-Enhanced Hot-Wire Anemometer by Using Cladding-Etched Fiber Bragg Grating

Multichannel Fiber Optic SPR Sensors: Realization Methods, Application Status, and Future Prospects

Temperature-Compensated Multi-Point Strain Sensing Based on Cascaded FBG and Optical FMCW Interferometry

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