Heming Wei
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View article: Development of a Spindle-Type FBG Pressure Sensor for Pressure Monitoring at the Wind Turbine Foundation Ring–Concrete Interface
Development of a Spindle-Type FBG Pressure Sensor for Pressure Monitoring at the Wind Turbine Foundation Ring–Concrete Interface Open
This study presents a fiber Bragg grating (FBG) pressure sensor with a spindle-type protective structure, optimized using the NSGA-II algorithm, for monitoring pressure variations at the contact interface between wind turbine foundation ri…
View article: Development of a Large-Range FBG Strain Sensor Based on the NSGA-II Algorithm
Development of a Large-Range FBG Strain Sensor Based on the NSGA-II Algorithm Open
To monitor large deformations in dovetail tenon joints of Dong ethnic wooden drum towers, this study designs a large-range Fiber Bragg Grating (FBG) strain sensor based on the FBG sensing principle. The NSGA-II algorithm is utilized to opt…
View article: Real-time, label-free phase contrast imaging via programmable SLM-based phase mask in off-axis digital holography
Real-time, label-free phase contrast imaging via programmable SLM-based phase mask in off-axis digital holography Open
Label-free imaging of transparent biological cells is essential for studying native morphology and dynamics without the interference of chemical stains or phototoxic effects. Existing phase contrast methods, however, often rely on computat…
View article: 3D printed near-infrared high-numerical aperture achromatic metalens
3D printed near-infrared high-numerical aperture achromatic metalens Open
View article: Lorentz Force Magnetic Field Sensor Using Cladding-Etched Heterogeneous Integrated Optical Fiber with Triple Side Nickel Cores
Lorentz Force Magnetic Field Sensor Using Cladding-Etched Heterogeneous Integrated Optical Fiber with Triple Side Nickel Cores Open
A Lorentz force magnetic field sensor is demonstrated using a cladding etched heterogeneous integrated optical fiber with triple-side nickel cores (TSNCF). The sensing fiber heterogeneously integrates three nickel side cores in a single-mo…
View article: Low temperature cross-sensitivity vector torsion sensor based on an in-fiber Mach-Zehnder interferometer with helical side-hole fiber
Low temperature cross-sensitivity vector torsion sensor based on an in-fiber Mach-Zehnder interferometer with helical side-hole fiber Open
What we believe to be a novel in-fiber vector torsion sensor based on a Mach-Zehnder interferometer (MZI) constructed using helical side-hole fibers (HSHFs) is proposed. A segment of HSHF is spliced between two single-mode fibers to excite…
View article: A Study on the Spatial Frequency Division Multiplexed of Fiber Bragg Grating-Fabry-Perot Interferometer Sensors with Weak Gratings
A Study on the Spatial Frequency Division Multiplexed of Fiber Bragg Grating-Fabry-Perot Interferometer Sensors with Weak Gratings Open
View article: Highly stabilized fiber Bragg grating accelerometer based on cross-type diaphragm
Highly stabilized fiber Bragg grating accelerometer based on cross-type diaphragm Open
A fiber Bragg grating (FBG) accelerometer based on cross-type diaphragm was proposed and designed, in which the cross-beam acts as a spring element. To balance the sensitivity and stability, the accelerometer structure was optimized. The e…
View article: Distributed optical fiber magnetic field sensor based on polarization-sensitive OFDR
Distributed optical fiber magnetic field sensor based on polarization-sensitive OFDR Open
A distributed optical fiber magnetic field sensor based on a polarization-sensitive optical frequency domain reflectometer (POFDR) is proposed. It extracts the accumulated Faraday rotation by combining the Stokes vectors and the backward M…
View article: Heterogeneous integrated optical fiber with side nickel core for distributed magnetic field sensing
Heterogeneous integrated optical fiber with side nickel core for distributed magnetic field sensing Open
A design of a heterogeneous integrated optical fiber with side nickel core (SNCF) has been proposed and demonstrated for distributed fiber-optic magnetic field sensing. Experimental results show that magnetic properties of nickel can be pr…
View article: Effects of Homogeneous Buffer Layer on the Crystalline Quality And Electrical Properties of Czt Epitaxial Films
Effects of Homogeneous Buffer Layer on the Crystalline Quality And Electrical Properties of Czt Epitaxial Films Open
View article: Towards high-sensitivity and high-accuracy forward Brillouin scattering-based optomechanical temperature sensing in thin-diameter fibers
Towards high-sensitivity and high-accuracy forward Brillouin scattering-based optomechanical temperature sensing in thin-diameter fibers Open
We numerically and experimentally demonstrated a high-sensitivity and high-accuracy temperature sensor based on guided acoustic radial modes of forward stimulated Brillouin scattering (FSBS)-based optomechanics in thin-diameter fibers (TDF…
View article: Low loss side-polished pumping coupler for high order OAM modes amplification
Low loss side-polished pumping coupler for high order OAM modes amplification Open
An all-fiber fiber coupler was demonstrated for pumping orbital angular momentum (OAM) modes amplification, which was fabricated by side-polishing and bonding a ring-core erbium-doped fiber (RC-EDF) and a pre-tapered side-polished single-m…
View article: Laser-induced ultrasound imaging of multi metal laminate with complex interface
Laser-induced ultrasound imaging of multi metal laminate with complex interface Open
The corrugated rolling process is a new type of metal clad plate production method, and the high-precision testing of the corrugated interface is of great significance to the improvement of product quality. This paper integrates laser ultr…
View article: Data‐Class‐Specific All‐Optical Transformations and Encryption
Data‐Class‐Specific All‐Optical Transformations and Encryption Open
Diffractive optical networks provide rich opportunities for visual computing tasks. Here, data‐class‐specific transformations that are all‐optically performed between the input and output fields‐of‐view (FOVs) of a diffractive network are …
View article: Point-by-Point Induced High Birefringence Polymer Optical Fiber Bragg Grating for Strain Measurement
Point-by-Point Induced High Birefringence Polymer Optical Fiber Bragg Grating for Strain Measurement Open
In this paper, the first- and fourth-order fiber Bragg grating (FBG)-based axial strain sensors are proposed. The FBGs are inscribed in step-index polymer optical fibers (POFs) (TOPAS core and ZEONEX cladding) via the point-by-point (PbP) …
View article: Micro-Nano Optical Thermometry: Study on the Heat Transfer from Silicon Core Fiber to Fiber-Bragg-Grating-Based Spm Probe
Micro-Nano Optical Thermometry: Study on the Heat Transfer from Silicon Core Fiber to Fiber-Bragg-Grating-Based Spm Probe Open
View article: The Effect of Thermal Treated GaSb Substrate for Epitaxial Growth of CdZnTe Film by Close-Spaced Sublimation Method
The Effect of Thermal Treated GaSb Substrate for Epitaxial Growth of CdZnTe Film by Close-Spaced Sublimation Method Open
View article: Data class-specific all-optical transformations and encryption
Data class-specific all-optical transformations and encryption Open
Diffractive optical networks provide rich opportunities for visual computing tasks since the spatial information of a scene can be directly accessed by a diffractive processor without requiring any digital pre-processing steps. Here we pre…
View article: Generation, Transmission, and Amplification of OAM Modes in the PbSe-Doped Ring-Core Fiber Carrying 3D Printed Spiral Phase Plate
Generation, Transmission, and Amplification of OAM Modes in the PbSe-Doped Ring-Core Fiber Carrying 3D Printed Spiral Phase Plate Open
Vortex beams carrying orbital angular momentum (OAM) have increasingly attracted attention in the field of optical communication. However, transmission is still an issue due to transmission loss, especially in optical fibers. In this work,…
View article: Carbon Nanocoils and Polyvinyl Alcohol Composite Films for Fiber-Optic Fabry–Perot Acoustic Sensors
Carbon Nanocoils and Polyvinyl Alcohol Composite Films for Fiber-Optic Fabry–Perot Acoustic Sensors Open
Carbon nanocoils (CNCs) are widely used in functional devices due to their helical morphology, which can be utilized in the fabrication of functional materials with unique properties. In this study, CNCs/polyvinyl alcohol (PVA) composite f…
View article: Microbubble-based optical fiber Fabry-Perot sensor for simultaneous high-pressure and high-temperature sensing
Microbubble-based optical fiber Fabry-Perot sensor for simultaneous high-pressure and high-temperature sensing Open
An all-silica Fabry-Perot interferometer (FPI) based on a microbubble for high-pressure and high-temperature measurements is proposed and demonstrated. The microbubble-based air cavity is fabricated using a hollow silica tube and a single-…
View article: Hermetic Welding of an Optical Fiber Fabry–Pérot Cavity for a Diaphragm-Based Pressure Sensor Using CO2 Laser
Hermetic Welding of an Optical Fiber Fabry–Pérot Cavity for a Diaphragm-Based Pressure Sensor Using CO2 Laser Open
A diaphragm-based hermetic optical fiber Fabry–Pérot (FP) cavity is proposed and demonstrated for pressure sensing. The FP cavity is hermetically sealed using one-step CO2 laser welding with a cavity length from 30 to 100 μm. A thin diaphr…
View article: Disordered mullite grains in a sapphire-derived fiber for high-temperature sensing
Disordered mullite grains in a sapphire-derived fiber for high-temperature sensing Open
In this study, a sapphire-derived fiber (SDF)-based Fabry-Pérot interferometer (FPI) is proposed and experimentally demonstrated as a high-temperature sensor using the arc discharge crystallization process, forming a region with disordered…
View article: Quasi-Distributed Magnetic Field Fiber Sensors Integrated with Magnetostrictive Rod in OFDR System
Quasi-Distributed Magnetic Field Fiber Sensors Integrated with Magnetostrictive Rod in OFDR System Open
We have proposed and designed a fiber-optic magnetic field sensors based on magnetostriction, of which the magnetostrictive induced strain of magnetostrictive rod attached to an optical fiber can be measured by optical frequency-domain ref…
View article: Using Mechanically-Induced Long-Period Fiber Gratings for OAM Modes Generation Based on Anti-Resonant Mechanisms in Ring-Core Fibers
Using Mechanically-Induced Long-Period Fiber Gratings for OAM Modes Generation Based on Anti-Resonant Mechanisms in Ring-Core Fibers Open
A flexible first-order OAM modes generation in ring-core fibers (RCFs) based on a mechanically-induced long-period fiber grating (MLPFG) is proposed. By directly fusion splicing a standard single-mode fiber (SMF) and RCFs, the anti-resonan…
View article: Continuous tuning of unidirectional emission wavelength by bending a notched-elliptical polymer microdisk
Continuous tuning of unidirectional emission wavelength by bending a notched-elliptical polymer microdisk Open
An approach of continuously tunable unidirectional emission through bending a notched-elliptical polymer microdisk is proposed. The characteristics of the bending-dependent action are carefully analyzed, and the resonance wavelength for un…
View article: Compound Fabry–Pérot interferometer for simultaneous high-pressure and high-temperature measurement
Compound Fabry–Pérot interferometer for simultaneous high-pressure and high-temperature measurement Open
We have proposed and experimentally demonstrated a sapphire-derived fiber (SDF) and silica capillary-based compound Fabry-Pérot interferometer (FPI) for high-pressure and high-temperature sensing. The SDF owns high alumina dopant concentra…
View article: Influence of Temperature on All-Silica Fabry-Pérot Pressure Sensor
Influence of Temperature on All-Silica Fabry-Pérot Pressure Sensor Open
An all-silica Fabry-Pérot interferometer (FPI) is demonstrated for high-temperature pressure monitoring. The pressure sensor is fabricated with single mode fiber and silica capillary by CO2 laser. Owing to slight mismatch of the…
View article: Magneto-Refractive Effect and Mechanism Analysis of Erbium-Ytterbium Co-Doped Silica Fiber
Magneto-Refractive Effect and Mechanism Analysis of Erbium-Ytterbium Co-Doped Silica Fiber Open
The magneto-refractive properties of Er/Yb co-doped silica fiber (EYDF) are important in magnetic field sensing. Here, we proposed a theoretical calculation model of the EYDF using density functional theory (DFT) and demonstrated it by an …