A simple and effective interference-fading tolerant method for phase-sensitive optical time-domain reflectometry(Φ-OTDR) using optimal peak-seeking is proposed. This method can reconstruct the vibration signal with h...A simple and effective interference-fading tolerant method for phase-sensitive optical time-domain reflectometry(Φ-OTDR) using optimal peak-seeking is proposed. This method can reconstruct the vibration signal with high fidelity under the premise of using only an ordinary single-mode sensing fiber without changing the structure of the traditional Φ-OTDR system. Based on the data after interference suppression, we applied different machine learning models to recognize the invasive events category. The promising results show potential applications of Φ-OTDR equipment and future implementation with machine learning algorithms.展开更多
A reflective surface plasmon resonance （SPR） sensor based on optical fiber microring is proposed. In such a sensor, plasmons on the outer surface of the metallized channels containing analyte can be excited by a fun...A reflective surface plasmon resonance （SPR） sensor based on optical fiber microring is proposed. In such a sensor, plasmons on the outer surface of the metallized channels containing analyte can be excited by a fundamental mode of a thin-core fiber （TCF）. The refractive index （RI） sensing can be achieved as the surface plasmons are sensitive to changes in the refrective index of the analyte. Numerical simulation results show that the resonance spectrum shifts toward the shorter wavelength gradually when the analyte refractive index increases from 1.0 to 1.33, whereas it shifts toward the longer wavelength gradually when the analyte refractive index increases from 1.33 to 1.43, and there is a turning point at the refractive index value of 1.33. The highest sensitivity achieved is up to 2.30×10^3nm/RIU near the refractive index value of 1.0. Such a compact sensor has potential for gaseous substance monitoring.展开更多
基金supported by the National Natural Science Foundation of China (Nos. 61627816 and 61975076)the Beijing Natural Science Foundation (No. 4192042)+2 种基金the Key Research and Development Program of Jiangsu Province (No. BE2018047)the Natural Science Foundation of Jiangsu Province (No. BK20180328)the Key Technology R&D Program of Inner Mongolia Autonomous Region。
文摘A simple and effective interference-fading tolerant method for phase-sensitive optical time-domain reflectometry(Φ-OTDR) using optimal peak-seeking is proposed. This method can reconstruct the vibration signal with high fidelity under the premise of using only an ordinary single-mode sensing fiber without changing the structure of the traditional Φ-OTDR system. Based on the data after interference suppression, we applied different machine learning models to recognize the invasive events category. The promising results show potential applications of Φ-OTDR equipment and future implementation with machine learning algorithms.
基金This work was supported by the Natural Science Foundation of Zhejiang Province China under Grant No.LY 17F050010.
文摘A reflective surface plasmon resonance （SPR） sensor based on optical fiber microring is proposed. In such a sensor, plasmons on the outer surface of the metallized channels containing analyte can be excited by a fundamental mode of a thin-core fiber （TCF）. The refractive index （RI） sensing can be achieved as the surface plasmons are sensitive to changes in the refrective index of the analyte. Numerical simulation results show that the resonance spectrum shifts toward the shorter wavelength gradually when the analyte refractive index increases from 1.0 to 1.33, whereas it shifts toward the longer wavelength gradually when the analyte refractive index increases from 1.33 to 1.43, and there is a turning point at the refractive index value of 1.33. The highest sensitivity achieved is up to 2.30×10^3nm/RIU near the refractive index value of 1.0. Such a compact sensor has potential for gaseous substance monitoring.
