scholarly journals Surface-Plasmon-Resonance-Based Optical-Fiber Micro-Displacement Sensor with Temperature Compensation

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3210 ◽  
Author(s):  
Yong Wei ◽  
Ping Wu ◽  
Zongda Zhu ◽  
Lu Liu ◽  
Chunlan Liu ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Optical Fiber ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Temperature Compensation ◽  
Incident Beam ◽  
Resonance Wavelength ◽  
Displacement Sensor ◽  
Displacement Sensors ◽  
Highly Sensitive

Micro-displacement measurements play a crucial role in many industrial applications. Aiming to address the defects of existing optical-fiber displacement sensors, such as low sensitivity and temperature interference, we propose and demonstrate a novel surface plasmon resonance (SPR)-based optical-fiber micro-displacement sensor with temperature compensation. The sensor consists of a displacement-sensing region (DSR) and a temperature-sensing region (TSR). We employed a graded-index multimode fiber (GI-MMF) to fabricate the DSR and a hetero-core structure fiber to fabricate the TSR. For the DSR, we employed a single-mode fiber (SMF) to change the radial position of the incident beam as displacement. The resonance angle in the DSR is highly sensitive to displacement; thus, the resonance wavelength of the DSR shifts. For the TSR, we employed polydimethylsiloxane (PDMS) as a temperature-sensitive medium, whose refractive index is highly sensitive to temperature; thus, the resonance wavelength of the TSR shifts. The displacement and temperature detection ranges are 0–25 μm and 20–60 °C; the displacement and temperature sensitivities of the DSR are 4.24 nm/μm and −0.19 nm/°C, and those of the TSR are 0.46 nm/μm and −2.485 nm/°C, respectively. Finally, by means of a sensing matrix, the temperature compensation was realized.

scholarly journals Highly Sensitive Surface Plasmon Resonance Humidity Sensor Based on a Polyvinyl-Alcohol-Coated Polymer Optical Fiber

Biosensors ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 461
Author(s):  
Ying Wang ◽  
Jingru Wang ◽  
Yu Shao ◽  
Changrui Liao ◽  
Yiping Wang
Keyword(s):  
Surface Plasmon Resonance ◽  
Polyvinyl Alcohol ◽  
Optical Fiber ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Humidity Sensor ◽  
Wavelength Shift ◽  
Polymer Optical Fiber ◽  
Human Breath ◽  
Highly Sensitive

A surface-plasmon-resonance-based fiber device is proposed for highly sensitive relative humidity (RH) sensing and human breath monitoring. The device is fabricated by using a polyvinyl alcohol (PVA) film and gold coating on the flat surface of a side-polished polymer optical fiber. The thickness and refractive index of the PVA coating are sensitive to environmental humidity, and thus the resonant wavelength of the proposed device exhibits a redshift as the RH increases. Experimental results demonstrate an average sensitivity of 4.98 nm/RH% across an ambient RH ranging from 40% to 90%. In particular, the sensor exhibits a linear response between 75% and 90% RH, with a sensitivity of 10.15 nm/RH%. The device is suitable for human breath tests and shows an average wavelength shift of up to 228.20 nm, which is 10 times larger than that of a silica-fiber-based humidity sensor. The corresponding response and recovery times are determined to be 0.44 s and 0.86 s, respectively. The proposed sensor has significant potential for a variety of practical applications, such as intensive care and human health analysis.

scholarly journals Comparison between one layer and bilayer surface Plasmon resonance optical fiber chemical sensor

2020 ◽  
Vol 12 (02) ◽  
pp. 52-60
Author(s):  
Soudad S. Ahmed ◽  
Keyword(s):  
Surface Plasmon Resonance ◽  
Optical Fiber ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Chemical Sensor ◽  
Salt Water ◽  
Water Solution ◽  
Single Layer ◽  
Resonance Wavelength ◽  
Plastic Optical Fiber

Surface Plasmon Resonance (SPR) - based plastic optical fiber has been provided as a sensor to estimating the refractive index and then the concentration of specific chemical samples. Two configurations were suggested for a design. The first was through using a single layer of gold with a thickness of about 40nm deposited on a 10mm portion in the middle of plastic optical fiber. In the second configuration, a bilayer deposited on the fiber. This bilayer consisted of a gold layer with a thickness of about 30 nm and an aluminum layer with a thickness of about 30 nm. Both of these configurations utilized as a chemical sensor. The resonance wavelength for the bilayer-based sensor was higher than that of the single-layer sensor for all studied chemical samples. The highest resonance wavelength was for the salt-water solution with a concentration of 30%. For the salt-water solution with a concentration of 30%, the resonance wavelength with the bilayer-based sensor was 568nm while it was 540nm with the single-layer sensor.

A Highly Sensitive Fibre-Optic Nano-Displacement Sensor Based on Surface Plasmon Resonance

2016 ◽  
Vol 34 (9) ◽  
pp. 2324-2330 ◽  
Author(s):  
Xiao-Ming Wang ◽  
Chun-Liu Zhao ◽  
Yan-Ru Wang ◽  
Chang-Yu Shen ◽  
Xin-Yong Dong
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Displacement Sensor ◽  
Fibre Optic ◽  
Highly Sensitive

Highly-sensitive and reflective glucose sensor based on optical fiber surface plasmon resonance

2020 ◽  
Vol 157 ◽  
pp. 105010
Author(s):  
Wanlu Zheng ◽  
Bo Han ◽  
Siyu E ◽  
Yang Sun ◽  
Xuegang Li ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Optical Fiber ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Glucose Sensor ◽  
Fiber Surface ◽  
Highly Sensitive

scholarly journals Highly sensitive surface plasmon resonance biosensor based on a low-index polymer optical fiber

2018 ◽  
Vol 26 (4) ◽  
pp. 3988 ◽  
Author(s):  
Shaoqing Cao ◽  
Yu Shao ◽  
Ying Wang ◽  
Tiesheng Wu ◽  
Longfei Zhang ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Optical Fiber ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Polymer Optical Fiber ◽  
Surface Plasmon Resonance Biosensor ◽  
Highly Sensitive

scholarly journals Surface-Plasmon-Resonance-Based Optical Fiber Curvature Sensor with Temperature Compensation by Means of Dual Modulation Method

Sensors ◽  
2018 ◽  
Vol 18 (8) ◽  
pp. 2608 ◽  
Author(s):  
Yudong Su ◽  
Yong Wei ◽  
Yonghui Zhang ◽  
Chunlan Liu ◽  
Xiangfei Nie ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Optical Fiber ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Resonance Wavelength ◽  
Modulation Method ◽  
Sensing Matrix ◽  
Wavelength Sensitivity ◽  
Curvature Measurement ◽  
Curvature Sensor

Curvature measurement plays an important role in many fields. Aiming to overcome shortcomings of the existing optical fiber curvature sensors, such as complicated structure and difficulty in eliminating temperature noise, we proposed and demonstrated a simple optical fiber curvature sensor based on surface plasmon resonance. By etching cladding of the step-index multimode fiber and plating gold film on the bare core, the typical Kretschmann configuration is implemented on fiber, which is used as the bending-sensitive region. With increases in the curvature of the optical fiber, the resonance wavelength of the SPR (Surface Plasmon Resonance) dip linear red-shifts while the transmittance decreases linearly. In the curvature range between 0 and 9.17 m−1, the wavelength sensitivity reached 1.50 nm/m−1 and the intensity sensitivity reached −3.66%/m−1. In addition, with increases in the ambient temperature, the resonance wavelength of the SPR dips linearly blueshifts while the transmittance increases linearly. In the temperature range between 20 and 60 °C, the wavelength sensitivity is −0.255 nm/°C and the intensity sensitivity is 0.099%/°C. The sensing matrix is built up by combining the aforementioned four sensitivities. By means of the dual modulation method, the cross-interference caused by temperature change is eliminated. Additionally, simultaneous measurement of curvature and temperature is realized.

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