Article
Optics
Liuyang Yang, Yanpeng Li, Fang Fang, Liangye Li, Zhijun Yan, Lin Zhang, Qizhen Sun
Summary: In this study, a microfiber with large evanescent field encapsulated in PDMS is proposed and demonstrated for ultrasound sensing. The compact size and large evanescent field of the microfiber provide an excellent platform for the interaction between optical signals and ultrasound waves, resulting in a high sensitivity. A phase feedback stabilization module is introduced into the coherent demodulation system for long-term stable measurement. In addition, a photoacoustic tomography experiment is conducted to confirm the excellent imaging performance of the microfiber ultrasound sensor.
OPTO-ELECTRONIC ADVANCES
(2022)
Article
Engineering, Electrical & Electronic
Yuting Bai, Yinping Miao, Hongmin Zhang, Chengwei Fei, Bin Li, Kailiang Zhang
Summary: A fiber-optic sensor based on microfiber coupler is proposed for dual parameter detection of acetaminophen and temperature. The sensor showed detection sensitivities for acetaminophen concentration and temperature, indicating its potential application in pharmaceutical quality control and hospital wastewater treatment.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Multidisciplinary
Yang Zhou, Yiying Liu, Na Wang, Xutao Han, Junhao Li
Summary: This paper demonstrates the application of microfiber coupler sensor (MFCS) and optimized support vector machine (BSO-SVM) algorithm in the pattern recognition of transformer partial discharge (PD) signals. The results show that the combination of MFCS and BSO-SVM achieves high classification accuracy and fast convergence speed, which is of great significance for transformer fault diagnosis.
Article
Engineering, Electrical & Electronic
Ziji Wang, Hongdan Wan, Zhongwei Liang, Xinyu Chen
Summary: The research proposes fiber twist sensors based on reflective microfiber couplers with different types of fibers. It found that the single-mode fiber RMC and the polarization-maintaining fiber RMC have high twist sensitivity, linearity, thermal stability, and low loss.
OPTICAL FIBER TECHNOLOGY
(2022)
Article
Instruments & Instrumentation
Chunyang Han, Hui Ding, Baojin Li, Lei Shi, Haodong Xu
Summary: In this research, a miniature diaphragm-free fiber-optic microphone based on a plano-concave optical micro-interferometer is proposed for sensitive detection of sound waves. The experimental results demonstrate that the microphone has the ability to detect sound waves in the whole audible range and almost omnidirectional.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Article
Engineering, Electrical & Electronic
Paris Velez, Ferran Paredes, Pau Casacuberta, Mahmoud Elgeziry, Lijuan Su, Jonathan Munoz-Enano, Filippo Costa, Simone Genovesi, Ferran Martin
Summary: This article presents a low-cost and portable phase-variation planar microwave sensor operating in reflective mode, which retrieves the phase of the reflection coefficient of the one-port sensing element using a distributed circuit based on a pair of rat-race hybrid couplers and associated electronics. This architecture can be adapted to other one-port reflective-mode phase-variation microwave sensors.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Paris Velez, Ferran Paredes, Pau Casacuberta, Mahmoud Elgeziry, Lijuan Su, Jonathan Munoz-Enano, Filippo Costa, Simone Genovesi, Ferran Martin
Summary: This article presents a low-cost and portable planar microwave sensor that operates in reflective mode and retrieves the phase of the reflection coefficient using a distributed circuit and associated electronics. This eliminates the need for expensive vector network analyzers typically used in one-port structures. The architecture can be adapted to other reflective-mode microwave sensors, as demonstrated in the prototype example where the sensing element is an open-ended transmission line with a step-impedance.
IEEE SENSORS JOURNAL
(2023)
Article
Optics
Wen Yu, Ni Yao, Jing Pan, Wei Fang, Xiong Li, Limin Tong, Lei Zhang
Summary: This research presents a highly sensitive and fast response optical strain sensor with potential applications in electronic skins, wearable medical devices, and robots. The sensor demonstrates a high gauge factor and strain resolution, enabling it to be used for various purposes such as physiological signal monitoring, voice recognition, and micro-displacement detection.
OPTO-ELECTRONIC ADVANCES
(2022)
Article
Engineering, Electrical & Electronic
Junjie Weng, Yang Yu, Jianfa Zhang, Dongying Wang, Zhechun Lu, Zhencheng Wang, Jianqiao Liang, Shumao Zhang, Xiangcheng Li, Yang Lu, Zhou Meng, Junbo Yang, Zhenrong Zhang
Summary: In this paper, a biomimetic optical skin (BOS) based on optical microfiber coupler neuron (OMCN) is proposed, which realizes multimodal tactile perception for the first time. BOS can sensitively detect temperature, contact force, vibration, and recognize the hardness and roughness of objects through human-like tactile sensing. Furthermore, the excellent repeatability and stability of BOS are investigated, laying the foundation for practical applications.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Multidisciplinary
Wencheng Fu, Yiying Liu, Linjie Wang, Xuhong Wang
Summary: This study presents an improved modal analysis method using a microfiber coupler sensor (MFCS) for source location. The method utilizes the Minimum Squared Error (MSE) to reduce reliance on frequency selection and automate the locating process. The study first investigates the secondary enclosed package method of MFCS to ensure signals meet the requirements of contour threshold modal analysis. The MSE method is then introduced, followed by directionality experiments to determine optimal layout methods for planar localization. Linear and planar location experiments on an aluminium thin plate are conducted, revealing the suitability of the sensor packaged by a cuboid glass tube for practical ultrasonic testing, the effectiveness of the automation process, and the accuracy and repeatability of planar localization using three sensors. The study demonstrates the feasibility and effectiveness of combining the MFCS and MSE method for planar localization.
Article
Optics
Shangpeng Qin, Junyang Lu, Minwei Li, Yang Yu, Junbo Yang, Zhenrong Zhang
Summary: This paper proposes a novel magnetic field sensor based on OMCI and MF, which has high sensitivity and application potential. Experimental results show that the sensor sensitivity increases with the decrease of the OMC waist radius.
Article
Engineering, Electrical & Electronic
N. Alcheikh, S. Ben Mbarek, H. M. Ouakad, M. Younis
Summary: The miniature highly sensitive wide-range resonant magnetic Lorentz-force micro-sensor demonstrates high sensitivity and low power consumption, making it promising for various low-cost magnetic applications. The device operates based on the detection of resonance frequency of an in-plane electrothermally heated straight resonator near the buckling point, showing a measured sensitivity of 33.9/T with good linearity in low and high magnetic field regimes.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Engineering, Electrical & Electronic
Taiji Dong, Bingkun Gao, Xu Liu, Yunkai Wang, Chunlei Jiang, Xiufang Wang, Wendi Yan, Yang Zhang
Summary: In this study, a sensor based on an optical microfiber coupler (OMC) and a Sagnac ring is proposed to achieve large-range and high-sensitivity strain and vibration measurements. The sensor takes advantage of the sensitivity of the evanescent field around the OMC and the tensile resistance of the Sagnac ring, and experimental results demonstrate its effectiveness in strain and vibration measurements.
IEEE SENSORS JOURNAL
(2023)
Article
Automation & Control Systems
Yong Yang, Meirong Zhao, Dantong Li, Moran Tao, Chunyuan Zhu, Yelong Zheng, Yu Tian
Summary: The viscoelastic-polymer micro-force (VPMF) sensor based on the shadow method has a high damping ratio and can effectively suppress disturbances, making it suitable for reliable micro-force measurement in complex environments.
Article
Materials Science, Multidisciplinary
Min Yuan, Shengli Pu, Dihui Li, Yongxi Li, Zijian Hao, Yuxiu Zhang, Chencheng Zhang, Shaokang Yan
Summary: An ultra-sensitive magnetic field sensor based on microfiber coupler and magnetic fluid is proposed, with significantly enhanced sensitivity near the birefringence-induced dispersion turning point. The sensor has high potential for applications in high-precision magnetic field measurement due to its extremely high sensitivity and low temperature sensitivity.
RESULTS IN PHYSICS
(2021)
Article
Optics
Ya-Ping Ruan, Hao-Dong Wu, Shi-Jun Ge, Lei Tang, Zhi-Xiang Li, Han Zhang, Fei Xu, Wei Hu, Min Xiao, Yan-Qing Lu, Ke-Yu Xia
Summary: This study demonstrates an ultralow-power all-optical switching by exploiting the chiral interaction between light and optically active material in a Mach-Zehnder interferometer. The achieved switching extinction ratio is high and the power cost is significantly reduced, making it a promising approach for ultralow-power and ultrafast all-optical information processing.
Article
Optics
Feng Xu, Yang Liu, Chi Zhang, Min Jiang, Jiahui Zhang, Guanghui Wang, Fei Xu, Yanqing Lu
Summary: In this study, an optically levitated conveyor belt based on a nanoslit-based metasurface lens is proposed for capturing, transporting, and sorting particles. By rotating the polarization angle of the excitation beam, the stiffness and success ratio of particle transport can be improved. The influence of polarization switching time and incident optical power densities on transport efficiency are also investigated.
Article
Optics
Yu Lei, Yifeng Xiong, Fei Xu, Zhuo Hen
Summary: This study demonstrates the design potential of optical fiber devices by integrating metasurfaces on the side surface of microfibers. The controllable phase shift and focusing effects are achieved by adjusting the positions of the dielectric rings and the polarization of the guided waves.
Article
Materials Science, Multidisciplinary
Zi-xuan Ding, Hao-tian Xu, Yi-feng Xiong, Kang-hu Zhou, Ye Chen, Yan-qing Lu, Fei Xu
Summary: This paper proposes and demonstrates a fiber-end-face-integrated electrically tunable optical modulator based on a graphene field-effect transistor and presents its fabrication methods. The all-fiber device offers compactness, high integration, and low insertion loss, and achieves vivid modulation through a reflecting structure. This is the first time that an all-solid gate-control modulator is directly built on a fiber facet, broadening the development of fiber-end-face integrated devices.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Hanqi Zhang, Hengtian Zhu, Qi Wu, Ye Chen, Rong Wang, Fei Xu, Ke Xiong
Summary: In this study, a microfiber Bragg grating (MFBG) bonded using tapered cantilever was designed and investigated using experimental, theoretical, and numerical methods. The tapered structure amplified the ultrasonic signal and eliminated the influences of static strain and evanescent field using the cantilever. Compared to the cantilevered fiber Bragg grating, the sensitivity of the sensor showed an upward trend with decreasing diameter, with 331% and 108% sensitivity increments observed for MFBGs with 20 and 40 μm diameters, respectively. The improvement was particularly apparent at high frequencies of the ultrasonic signal.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Yifeng Xiong, Zixuan Ding, Fei Xu
Summary: The integration of silica optical fibers with optoelectronic materials and electrical structures enables the development of miniaturized and multifunctional all-fiber optoelectronic systems. The flat endface of an optical fiber tip provides a platform for optoelectronic integration through micro- and nano-fabrication techniques. The rapid development of fiber-compatible fabrication technologies and the wide range of applications for active fiber tips, including photodetection, modulation, lasing, sensing, and light-emitting, are discussed in this paper. Challenges and opportunities for future development in this field are also addressed.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Run-ze Zhu, Hao-gong Feng, Yi-feng Xiong, Liu-wei Zhan, Fei Xu
Summary: We have demonstrated all-fiber reflective single-pixel imaging with a long working distance and large field of view. By using wavelength-dependent multimode fiber speckle to illuminate the object, the system is made compact and stable. With collimated MMF speckle patterns and an optical fiber receiving device, we achieved reflective optical fiber single-pixel imaging with a working distance of over 5 mm and a field of view of about 9 mm2. By employing compressed sensing, object images can be reconstructed with a sampling rate of about 4%. This work provides a method and reference for practical applications of optical fiber endoscopic imaging with requirements for a long working distance and large field of view.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Run-ze Zhu, Hao-gong Feng, Fei Xu
Summary: Multimode optical fiber (MMF) imaging is an emerging technology that allows for multispectral and polarimetric imaging. By controlling the wavelength and polarization, different channels can be constructed. With neural network training, image reconstruction and channel classification can be achieved with high accuracy and similarity.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Optics
Mengmeng Chen, Runze Zhu, Junxian Luo, Ali Masoudi, Ye Chen, Gilberto Brambilla, Fei Xu
Summary: Distributed vibration sensors (DVSs) are widely used in industrial production. This study demonstrates that the strain dynamic range of DVSs can be improved by analyzing the harmonic numbers in the vibration response spectrum, enabling quantitative measurement of vibration amplitude with a strain resolution of 0.78 mu epsilon for each additional harmonic.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Junxian Luo, Hanwen Liu, Huan Xing, Runze Zhu, Zhuo Chen, Fei Xu
Summary: In recent years, dexterous robotic hands have become indispensable in intelligent equipment. The use of bionic neurons that provide finger motion perception improves joint control accuracy. By utilizing series- and parallel-integrated inner cladding fiber Bragg gratings (ICFBG) as bionic neurons, the proposed fiber-optic neurons (FON) can achieve multi-joint bending perception in a robotic finger. The FONs are insensitive to temperature and axial strain and can potentially be utilized in robotic gesture recognition and control systems.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Editorial Material
Engineering, Electrical & Electronic
Gaozhi (George) Xiao, Tuan Guo, Fei Xu, Francesco Chiavaioli
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Zixuan Ding, Guorui Wang, Yifeng Xiong, Ye Chen, Fei Xu
Summary: An all-fiber dual-comb laser with a high repetition rate and repetition rate difference was demonstrated in this study. The laser generates asynchronous combs based on the high birefringence of the fiber and achieves a larger repetition rate difference compared to previous work. This laser exhibits good stability and coherence, which has the potential to enhance the acquisition rate and accuracy of dual-comb measurement systems.
Article
Nanoscience & Nanotechnology
Runze Zhu, Junxian Luo, Xinxin Zhou, Haogong Feng, Fei Xu
Summary: Multimode fiber (MMF) imaging is a new field of fiber imaging technology that has emerged in the last few decades. However, its sensitivity to dynamic perturbance limits its practical applications. In this study, an anti-perturbation scheme for MMF imaging based on active measurement of the fiber configuration is proposed. Experimental results show that the introduction of fiber configuration parameters can improve the quality of anti-perturbation imaging. Additionally, speckle prediction using the configuration parameters and a trained neural network is realized.
Article
Optics
Shu Xin, Lu Yingshen, Zhang Zifa, Kang Jiaxing, Yuan Xiang, Hong Feng, Xu Run, Ma Zhongquan, Xu Fei
Summary: In this study, high-quality CsPbIBr2 thick films were successfully prepared by pneumatic spraying via an interfacial seed layer modification strategy under an atmospheric environment with RH below 90%. The introduction of interfacial seed layers improved the crystallinity, interfacial contact, and structural stability of the CsPbIBr2 thick films. The photodiode-type CsPbIBr2 photodetectors showed low dark current, high performance photodetection parameters, and resistance to water and oxygen.
ACTA OPTICA SINICA
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Ling Hao, Zhenlan Dou, Fei Xu, Lei Chen, Qun Chen, Yong Min, Chunyan Zhang
Summary: The increasing proportion of renewable energy poses challenges to power grid in ensuring power supply. A large-scale ice-storage-based district cooling system and run-of-river hydropower can effectively reduce electricity load during peak periods. This paper establishes an integrated electricity and heat dispatch model considering ice storage systems and run-of-river hydropower, and analyzes the power supply ensuring effects of the combined systems under different operation strategies. Furthermore, multi-agent economic analyses are conducted to evaluate investments in ice storage equipment by cooling users, power grid, or third-party.
2023 5TH ASIA ENERGY AND ELECTRICAL ENGINEERING SYMPOSIUM, AEEES
(2023)
