scholarly journals Fiber optic refractive index sensors through spectral detection of Rayleigh backscattering in a chemically etched MgO-based nanoparticle-doped fiber

2018 ◽  
Vol 43 (24) ◽  
pp. 5945 ◽  
Author(s):  
Marzhan Sypabekova ◽  
Sanzhar Korganbayev ◽  
Wilfried Blanc ◽  
Takhmina Ayupova ◽  
Aliya Bekmurzayeva ◽  
...  
Keyword(s):  
Refractive Index ◽  
Fiber Optic ◽  
Rayleigh Backscattering ◽  
Spectral Detection ◽  
Refractive Index Sensors

scholarly journals Fiber Optic Refractive Index Sensors Based on a Ball Resonator and Optical Backscatter Interrogation

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 6199
Author(s):  
Madina Shaimerdenova ◽  
Takhmina Ayupova ◽  
Marzhan Sypabekova ◽  
Daniele Tosi
Keyword(s):  
Refractive Index ◽  
Reflection Spectrum ◽  
Return Loss ◽  
Fiber Optic ◽  
Single Mode ◽  
Wavelength Shift ◽  
Amplitude Change ◽  
Highly Sensitive ◽  
Refractive Index Sensors ◽  
Index Unit

In this work, we introduced fabrication and interrogation of simple and highly sensitive fiber-optic refractive index (RI) sensors based on ball resonators built on the tip of single-mode fibers. The probes have been fabricated through a CO2 fiber splicer, with a fast (~600 s) and repeatable method. The ball resonator acted as a weak interferometer with a return loss below −50 dB and was interrogated with an optical backscatter reflectometer measuring the reflection spectrum. The ball resonators behaved as weak interferometers with a shallow fringe and a spectrum that appeared close to a random signal, and RI sensitivity could be measured either through wavelength shift or amplitude change. In this work, we reported four samples having sensitivity ranges 48.9–403.3 nm/RIU and 256.0–566.2 dB/RIU (RIU = refractive index unit). Ball resonators appeared as a sensitive and robust platform for RI sensing in liquid and can be further functionalized for biosensing.

scholarly journals Spatial Frequency Multiplexing of Fiber-Optic Interferometric Refractive Index Sensors Based on Graded-Index Multimode Fibers

Sensors ◽  
2012 ◽  
Vol 12 (9) ◽  
pp. 12377-12385 ◽  
Author(s):  
Li Liu ◽  
Yuan Gong ◽  
Yu Wu ◽  
Tian Zhao ◽  
Hui-Juan Wu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Spatial Frequency ◽  
Fiber Optic ◽  
Multimode Fibers ◽  
Graded Index ◽  
Frequency Multiplexing ◽  
Refractive Index Sensors

Optimization for Closed-Loop Surface Plasmon Resonance Fiber-Optic Refractive Index Sensors Based on Tapered Probes

2015 ◽  
Vol 44 (2) ◽  
pp. 228001
Author(s):  
付丽辉 FU Li-hui ◽  
尹文庆 YIN Wen-qing ◽  
王马华 WANG Ma-hua ◽  
季仁东 JI Ren-dong ◽  
居勇峰 JU Yong-feng
Keyword(s):  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Closed Loop ◽  
Fiber Optic ◽  
Loop Surface ◽  
Refractive Index Sensors

Fiber-optic refractive-index sensors based on transmissive and reflective thin-core fiber modal interferometers

2010 ◽  
Vol 283 (10) ◽  
pp. 2136-2139 ◽  
Author(s):  
Tian-Hao Xia ◽  
A. Ping Zhang ◽  
Bobo Gu ◽  
Jing-Jing Zhu
Keyword(s):  
Refractive Index ◽  
Fiber Optic ◽  
Core Fiber ◽  
Refractive Index Sensors

Expermental Studies of Multimode Interference Based Fiber Optic Refractive Index Sensors

2010 ◽  
Vol 37 (6) ◽  
pp. 1516-1519 ◽  
Author(s):  
赵宇 Zhao Yu ◽  
金永兴 Jin Yongxing ◽  
董新永 Dong Xinyong ◽  
王剑锋 Wang Jianfeng
Keyword(s):  
Refractive Index ◽  
Fiber Optic ◽  
Multimode Interference ◽  
Refractive Index Sensors

scholarly journals Some Advanced Fiber-Optical Amplitude Modulated Reflection Displacement and Refractive Index Sensors

2007 ◽  
Vol 12 (2) ◽  
pp. 213-225 ◽  
Author(s):  
V. Kleiza ◽  
J. Verkelis
Keyword(s):  
Refractive Index ◽  
Fiber Optic ◽  
Displacement Sensor ◽  
Refractive Index Sensor ◽  
Large Interval ◽  
Displacement Sensors ◽  
Sensor Sensitivity ◽  
Fiber Optical ◽  
Sensor Configuration ◽  
Refractive Index Sensors

Some advanced fiber-optic amplitude modulated reflection displacement sensors and refractive index sensors have been developed. An improved three-fiber displacement sensor has been investigated as a refractive index sensor by computer simulations in a large interval of displacement. Some new regularities have been revealed. A reflection fiber-optic displacement sensor of novel configuration, consisting of double optical-pair fibers with a definite angle between the measuring tips of fibers in the pairs has been proposed, designed, and experimentally investigated to indicate and measure the displacement and refractive index of gas and liquid water solutions. The proposed displacement sensor and refractive index sensor configuration improves the measuring sensitivity in comparison with the known measuring methods. The refractive index sensor sensitivity Snsub = 4 × 10−7 RIU/mV was achieved. The displacement sensor sensitivity is Ssub = 1702 mV/µm in air (n = 1.00027).

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