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4th International Conference on Advanced Manufacturing technology and Electronic Information, AMTEI 2024

作者： Shang, Chuanyin Li, Peng Tong, Zhengrong Wang, Hao Li, Sibo Tianjin Key Laboratory of Thin Film Electronics and Communication Devices Engineering Research Center for Optoelectronic Devices and Communication Technology the Ministry of Education School of Integrated Circuit Science and Engineering Tianjin University of Technology Tianjin300384 China

ISBN: (数字)9781510688247

ISBN: (纸本)9781510688230

The development of machine learning is driving revolutionary changes and unprecedented opportunities across various industries. This paper introduces a new temperature monitoring method that combines the efficient deep learning model EfficientNet with Optical Frequency Domain Reflectometry (OFDR). We utilize distributed fiber-optic sensing technology based on OFDR to collect one-dimensional temperature signals under different temperature conditions, which we then transform into a two-dimensional image format suitable for machine learning processing. The dataset is subsequently trained using the EfficientNet deep learning model. The results show that the trained model achieves a high accuracy rate of 97.5% on the test dataset. This research not only demonstrates the feasibility of efficiently and accurately monitoring temperature changes but also provides new solutions and technological pathways for areas such as environmental monitoring, industrial automation, and safety systems. © 2025 SPIE.

关键词： Education and training Data modeling Performance modeling Fiber optics sensors Machine learning Matrices Fiber optics Image processing Reliability Signal processing

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Temperature-insensitive liquid level sensor based on U-shaped SMF

Temperature-insensitive liquid level sensor based on U-shape...

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2024 International Conference on optoelectronic Materials and devices, ICOMD 2024

作者： Wang, Muhua Tong, Zhengrong Zhang, Weihua Tianjin Key Laboratory of Thin Film Electronics and Communication Devices Engineering Research Center for Optoelectronic Devices and Communication Technology The Ministry of Education School of Integrated Circuit Science and Engineering Tianjin University of Technology Tianjin300384 China

ISBN: (数字)9781510689046

ISBN: (纸本)9781510689039

In this manuscript, a fiber optic sensor based on a U-shaped single mode fiber (SMF) is proposed for liquid level measurement. The U-shaped structure is fabricated by flame burning method. The U-shaped structure leads to energy leakage into the cladding, resulting in modal interference, and the sensor becomes more sensitive to external changes. The experimental results show that the level sensitivity is as high as 255.86 pm/mm in the range of 0-30 mm. The sensor exhibits temperature insensitivity in the range of 20-70 °C. The sensor avoids the problem of temperature crosstalk and is ideal for liquid level measurement. © 2025 SPIE.

关键词： Single mode fibers

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Recent progress of Ga_(2)O_(3)materials and devices based on the low-cost,vacuum-free Mist-CVD epitaxial growth method

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Fundamental Research 2024年第5期4卷 1292-1305页

作者： Zeyulin Zhang Pengru Yan Qingwen Song Haifeng Chen Wentao Zhang Hao Yuan Fengyu Du Dinghe Liu Dazheng Chen Yuming Zhang Wide Bandgap Semiconductor Technology Disciplines State Key Laboratory School of MicroelectronicsXidian UniversityXi'an 710071China Xidian-Wuhu Research Institute Wuhu 241000China Key Laboratory of Advanced Semiconductor Devices and Materials School of Electronic EngineeringXi'an University of Posts and TelecommunicationsXi'an 710121China Guangxi Key Laboratory of Optoelectronic Information Processing School of Optoelectronic EngineeringGuilin University of Electronic TechnologyGuilin541004China

Compared with silicon,gallium nitride,silicon carbide,and other traditional semiconductors,gallium oxide(Ga_(2)O_(3))who possesses,an ultrawide bandgap of approximately 5.0 eV and a higher breakdown field strength of approximately 8 MV/cm has attracted increasing attention from researchers,especially for the potential application in power ***,Ga_(2)O_(3)material has natural ultraviolet detection ability for photodetectors due to its ultrawide *** future commercial applications put forward an urgent require for high-quality epitaxial Ga_(2)O_(3)material in an efficient growth method at a lower *** there are some conventional methods for single crystal Ga_(2)O_(3)film epitaxial growth such as MBE and MOCVD,these methods always need a vacuum growth environment and expensive *** a fast-growing method,Mist-CVD gives the growth of Ga_(2)O_(3)in a vacuum-free,process-simple,and low-cost method,which will greatly reduce the cost and facilitate the development of Ga_(2)O_(3).This review has summarizes the Mist-CVD epitaxy growth mechanism of Ga_(2)O_(3),recent progress in the Ga_(2)O_(3)film epitaxial growth,and various device properties based on the Mist-CVD *** work aims to provide help for the development of Ga_(2)O_(3)material growth and device applications.

关键词： Gallium oxide Epitaxy growth Mist-CVD Single crystals Gallium oxide devices

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Linearly Polarized Polarization-Maintaining Er^(3+)-Doped Fluoride Fiber Laser in the Mid-Infrared

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Journal of Electronic Science and technology 2022年第1期20卷 1-8页

作者： Hong-Yu Luo Yong-Zhi Wang State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 610054

We demonstrated the~2.8-μm and~3.5-μm linearly polarized continuous wave(CW)laser outputs from a polarization-maintaining(PM)Er^(3+)-doped fluoride fiber *** introducing a film polarizer into the cavity to select the laser polarization orientation,the~2.8-μm linearly polarized CW laser with a high polarization extinction ratio(PER)of~23 dB and maximum output power of 2.37 W was achieved under double-end pumping at 976 *** adding another 1981-nm pump source simultaneously,the~3.5-μm linearly polarized CW laser was also obtained,giving higher PER of~27 dB and maximum output power of 307 mW which is only limited by the available power of 1981-nm *** the best of our knowledge,this is the first report on a mid-infrared linearly polarized CW PM fiber laser in the>2.5-μm mid-infrared *** work not only opens up opportunities for some new mid-infrared applications,but also provides a promising platform for developing high-stability and versatile mid-infrared laser sources.

关键词： Fiber laser linearly polarized mid-infrared polarization-maintaining(PM)

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A non-fluorinated liquid-like membrane with excellent anti-scaling performance for membrane distillation

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Chinese Chemical Letters 2025年第1期36卷 521-528页

作者： Jianwen Zhao Shuai Wang Shanshan Zhao Liwei Chen Fangang Meng Xuelin Tian State Key Laboratory of Optoelectronic Materials and Technologies School of Materials Science and EngineeringSun Yat-sen UniversityGuangzhou 510006China Key Laboratory for Polymeric Composite&Functional Materials of Ministry of Education Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable DevicesSun Yat-sen UniversityGuangzhou 510006China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology School of Environmental Science and EngineeringSun Yat-sen UniversityGuangzhou 510006China

Membrane distillation(MD)has gained extensive attention for treating highly saline ***,membrane scaling during the MD process has hindered the rapid development of this *** approaches to mitigate scaling in membrane distillation focus primarily on achieving enhanced hydrophobicity and even superhydrophobicity via utilizing fluorinated fibrous membrane or introducing perfluorosilane *** the environmental hazards posed by fluorinated compounds,it is highly desirable to develop non-fluorinated membranes with enhanced anti-scaling properties for effective membrane *** this study,we present a non-fluorinated liquid-like MD membrane with exceptional anti-scaling *** membrane was facilely fabricated by grafting linear polydimethylsiloxane(LPDMS)onto a hydrophilic polyether sulfone(PES)membrane pre-coated with the intermediate layers of polydopamine and silica(denoted as LPDMS-PES).Remarkably,LPDMS-PES manifested a drastically improved scaling resistance in continuous MD tests than its perfluorinated counterpart,i.e.,1H,1H,2H,2H-perfluorooctyltrichlorosilane-modified PES membrane(PFOS-PES),in both heterogeneous nucleation-dominated and crystal deposition-dominated scaling processes,despite the latter having a smaller surface ***-PES demonstrated a reduction of crystal accumulation of approximately 85%for Na Cl and 73%for Ca SO_(4) in the heterogeneous nucleation-dominated scaling process compared to ***,in the crystal deposition-dominated scaling process LPDMS-PES exhibited a reduction of about 70%in scale *** results explicitly evidenced the great potential of the liquid-like membrane to minimize scaling in membrane distillation by inhibiting both scale nucleation and adhesion onto the *** believe the findings of this study have important implications for the design of high-performance MD membranes,particularly in the quest for environmentally susta

关键词： Surface modification Liquid-like membranes Anti-scaling Non-fluorinated Direct contact membrane distillation

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Shape recognition and size measurement of particles in hybrid particle field based on interference technology

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optoelectronics Letters 2024年

作者：孙金露邱岳武宇航赵丹苗长云 Tianjin Key Laboratory of Optoelectronic Detection Technology and System School of Electronic and Information Engineering Tiangong University

An algorithm that can implement particle shape recognition and size measurement in hybrid particle field is proposed. Based on the defocused images obtained by the interferometric particle imaging system， shape recognition of particles can be realized through ResNet50. 2D Fourier transform and 2D autocorrelation transform are used to obtained the size of spherical and non-spherical particles， respectively. The shape and size of the particle in hybrid particle field are determined. Numerical simulation and experiment results suggest that the method has good accuracy in measuring the particle size of hybrid particle field.

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Mid-infrared period doubled solitons in a few-mode fluoride fiber oscillator

Mid-infrared period doubled solitons in a few-mode fluoride ...

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2024 Advanced Fiber Laser Conference, AFL 2024

作者： Yang, Ying Ma, Shuanglong Chen, Zifeng Luo, Xing Guo, Chunyu Ruan, Shuangchen Shenzhen Key Laboratory of Laser Engineering Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province State Key Laboratory of Radio Frequency Heterogeneous Integration College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen518060 China Key Laboratory of Advanced Optical Precision Manufacturing Technology of Guangdong Higher Education Institutes Shenzhen Technology University Shenzhen518118 China

ISBN: (数字)9781510688889

ISBN: (纸本)9781510688872

Period doubling bifurcation (PDB) phenomenon, which is prevalent in nonlinear systems, has attracted considerable attention because of its potential application value. As an ideal platform for studying the pulse dynamics of nonlinear systems, the mode-locked fiber laser has been intensively investigated in the near-infrared (NIR) spectral region. However, there is a paucity of relevant reports of pulse dynamics in the mid-infrared (MIR) spectral region. Especially for the MIR large-mode-area (LMA) fluoride fiber oscillator, the existence of multiple transverse modes and a new spatial degree of freedom makes the pulse dynamics phenomenon is more complex, which needs to be further explored. In this paper, a soliton regime with a pulse duration of 404.5 fs, repetition frequency of 45.02 MHz, and average output power of 105.3 mW is obtained in a few-mode fluoride fiber oscillator mode-locked by the nonlinear polarization rotation (NPR) technique. By merely increasing the power of the pump, a period doubled soliton with the pulse intensity varying between two different values can be obtained. This work facilitates a more profound comprehension of the nonlinear dynamics in the mid-infrared multimode fluoride fiber laser, and opens up new opportunities for the chaos, optical frequency combs and all-optical modulation. © 2025 SPIE.

关键词： Infrared devices

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Theoretical study of superradiant masing with solid-state spins at room temperature

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Science China(Physics,Mechanics & Astronomy) 2024年第6期67卷 38-47页

作者： Qilong Wu Yuan Zhang Hao Wu Shi-Lei Su Kai-Kai Liu Mark Oxborrow Chong-Xin Shan Klaus Mølmer Henan Key Laboratory of Diamond Optoelectronic Materials and Devices Key Laboratory of Material Physics Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052China Institute of Quantum Materials and Physics Henan Academy of SciencesZhengzhou 450046China Center for Quantum Technology Research and Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements School of PhysicsBeijing Institute of TechnologyBeijing 100081China Beijing Academy of Quantum Information Sciences Beijing 100193China Department of Materials Imperial College LondonLondon SW72AZUK Niels Bohr Institute University of CopenhagenCopenhagen 2100Denmark

Steady-state superradiance and superradiant lasing attract significant attentions in the field of optical lattice clocks,but have not been achieved yet due to the technical challenges and atom loss *** this article,we propose that their counter-part may be observed in the microwave domain with solid-state spins,i.e.,nitrogen-vacancy center spins and pentacene molecular spins,coupled to microwave resonator at room temperature with realistic technical *** validate our proposal,we investigate systematically the system dynamics and steady-state by solving quantum master equations for the multi-level and multi-process dynamics of trillions of *** calculations show that the superradiant Rabi oscillations occur firstly due to transitions among different Dicke states,and the subsequent continuous-wave superradiant masing can achieve a linewidth well below *** work may guide further exploration of transient and steady-state superradiant masing with the mentioned and other solid-state spins *** ultra-narrow linewidth may find applications in deep-space communications,radio astronomy and high-precision metrology.

关键词： solid-state spins superradiance maser

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Near-infrared Emissive 1,2-Dioxetane-based Chemiluminescent Probes

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Chemical Research in Chinese Universities 2024年第5期40卷 806-823页

作者： CHEN Yingqi BUDIANTA Richard NING Yingying Spin-X Institute School of Chemistry and Chemical EngineeringSchool of Biomedical Sciences and EngineeringState Key Laboratory of Luminescent Materials and DevicesGuangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional MaterialsSouth China University of TechnologyGuangzhou510641P.R.China

Chemiluminescence,a phenomenon emitting light from chemical reactions rather than photon absorption,has gained significant interest for applications in bioimaging and biosensing due to its high sensitivity and low background *** there is a growing interest in near-infrared(NIR)chemiluminescent probes for improved tissue penetration and reduced *** review summarizes NIR emissive chemiluminescent probes based on 1,2-dioxetane and discusses their chemical structures and *** modification strategies for red-shifting wavelength and enhancing brightness include incorporating electron-withdrawing groups,designing chemiluminophore-fluorophore cassettes,and exploring alternative chemiluminescent *** review aims to inspire the exploration of NIR chemiluminescent probes in disease detection and treatment.

关键词： Chemiluminescence Near-infrared Dioxetane Bioimaging Biosensing

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Compact OP-VECSEL-pumped Er:Yb:YAB microchip laser with M2 < 1.5 at 1.55 µm

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Optics Express 2025年第11期33卷 22235-22243页

作者： Wang, Wentao Lin, Zhongxi Qiu, Weibin Zhou, Pengfei Chen, Yujin Huang, Yidong Zhong, Xingli Su, Hui Key Laboratory of Optoelectronic Materials Chemistry and Physics Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices Fujian Institute of Research the Structure of Matter Chinese Academy of Science Fuzhou350002 China University of Chinese Academy of Sciences Chinese Academy of Sciences Beijing100039 China College of Information Science and Engineering Huaqiao University Xiamen361021 China Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou350108 China

An Er:Yb:YAB crystal laser emitting at 1.55 µm, optically pumped by a vertical external cavity surface emitting 980-nm laser (OP-VECSEL), is reported in this study. To the best of our knowledge, this is the first demonstration of an Er:Yb:YAB laser pumped by an OP-VECSEL. The OP-VECSEL was utilized to pump the Er:Yb:YAB microchip through plano-convex lens. By adjusting the cooling temperature, the output wavelength of OP-VECSEL was tuned to the crystal’s absorption peak. The maximum output power of 0.232 W at 1.55 µm with a pump power of 2.32 W at 980 nm was achieved, with a cavity length less than 100 mm. The beam quality factors of the laser output are M2x = 1.42 and M2y = 1.38, respectively, better than those of single-end and/or dual-end pumped Er:Yb:YAB microchip lasers. © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Optical pumping

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