A5040935561- Photonic and Optical Devices
- Hydraulic and Pneumatic Systems
- Advanced Fiber Laser Technologies
- Advanced Fiber Optic Sensors
- Mechanical and Optical Resonators
- Metallurgy and Material Forming
- Advanced Surface Polishing Techniques
- Acoustic Wave Resonator Technologies
- Vibration and Dynamic Analysis
- Photonic Crystals and Applications
- Animal Nutrition and Physiology
- Metal and Thin Film Mechanics
- Fuel Cells and Related Materials
- Photorefractive and Nonlinear Optics
- Magneto-Optical Properties and Applications
- Advanced machining processes and optimization
- Advanced Sensor and Control Systems
- Advanced MEMS and NEMS Technologies
- Industrial Technology and Control Systems
- Structural Behavior of Reinforced Concrete
- Innovative concrete reinforcement materials
- Geophysics and Sensor Technology
- Solid State Laser Technologies
- Structural Load-Bearing Analysis
- Laser and Thermal Forming Techniques
North University of China
2020-2025
Nanjing Agricultural University
2024
Shanghai Institute of Ceramics
2024
Chinese Academy of Sciences
2024
China Academy of Railway Sciences
2024
Zhejiang University of Technology
2003-2022
Jiaxing Vocational Technical College
2022
North China University of Water Resources and Electric Power
2012
Southeast University
2008
Hsin Sheng College of Medical Care and Management
2000-2001
Abstract Acoustic sensors with ultrahigh sensitivity, broadband response, and high resolution are essential for high-precision nondestructive weak signal detection technology. In this paper, based on the size effect of an ultrahigh-quality ( Q ) calcium fluoride (CaF 2 resonator, a acoustic is detected by dispersive response regime in which acoustic, elastic wave modulates geometry converted to resonance frequency shift. Through structural design sensitivity reaches 11.54 V/Pa at 10 kHz...
Chirp modulation can generate a relatively flat electro-optic frequency comb (EO comb) and offers the advantage of reconfigurability, demonstrating significant potential in high-precision sensing absorption spectroscopy measurements. However, nonresonant devices such as waveguides are susceptible to limitations efficiency bandwidth during modulation. In this paper, by utilizing chirp resonance mode, we have realized an EO based on lithium niobate resonator with small tooth spacing high...
The optical resonators with ultrahigh quality (Q) factor are advantageous as highly sensitive sensors, benefiting from the sharp characteristics of their resonance peaks. However, this high sensitivity is usually achieved at expense linear range, so sensing dynamic range physically limited. In paper, we propose a nonlinear modulation method based on generation an interference phenomenon between two scattering amplitudes. recursive property Bessel function utilized to construct expressions...
Abstract Preformed helical fittings play an indispensable role in ensuring the safe and stable operation.
Due to factors such as material of strands, environmental temperature, number pitch, preformed inevitably experience uneven heating during operation, which can cause localized softening leading warping or even fracture. Therefore, studying temperature rise characteristics is crucial for safety power transmission lines. This paper derives general parametric equations used...
Whispering gallery mode (WGM) crystalline resonator is an excellent platform for acoustic sensing because the quality ( <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Q</i> ) factor of 10 <sup xmlns:xlink="http://www.w3.org/1999/xlink">11</sup> can theoretically increase sensitivity by more than three orders magnitude. However, ultrahigh and wide dynamic response range cannot be achieved simultaneously, due to extremely narrow linewidth...
Ultralow stress sensors with ultrahigh sensitivity have an urgent need for micro-pressure measurement in aerospace, industrial automation and biomedical inventions. In this paper, a new method of micro sensing is proposed near the exceptional point (EP) parity-time symmetric systems theoretically. The EP determined via adjustment distance gain double ring resonators system, which one resonator embedded on cantilever beam served as element. cantilevers are characterized using finite element...
We propose a compact, high efficient full photonic crystal Mach-Zehnder (MZ) interferometer based on the self-collimation and band gap in two-dimensional crystals. Line defected crystals are used as beam splitter mirror. The interference theory is to discuss output mechanism, compared with finite-difference time-domain (FDTD) simulation results. designed MZ can surve micro-detectors of gas liquid, which may play an important role integrated optics.
By the equi-frequency contour analysis and finite-difference time-domain simulation, it is observed that distance of one lop in a photonic crystal self-collimation ring resonator can cause different periodic outputs for TE TM polarizations. Equal intensity polarization-independent beam splitter be achieved by choosing suitable propagation distance. It expands range application will play great role integrated optical circuits.
Optical microcavities with ultrahigh quality factors are still currently considered as one of the solutions to achieve miniaturized and precision accelerometers, but measurement sub-ng/Hz1/2 acceleration has yet be proven. Here we propose a new architecture for optomechanical sensing using prism microcavity coupling. The relative displacement between coupled is read in real time carrier information on resonance spectrum, which inverts loaded signal. In framework dissipative coupling...
Whispering-gallery mode (WGM) optical resonators with ultrahigh quality factor ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">${Q}{)}$ </tex-math></inline-formula> and small volume notation="LaTeX">${V}{)}$ are one of the most promising platforms for magnetic sensing. However, low conversion efficiency between signal resonator makes it difficult to break through pico-Tesla (pT) level sensitivity,...
Abstract As cities have grown, conductor rail power supplies been widely used in the field of urban transit. In order to improve running performance trains and reduce occurrence accidents, it is necessary understand vibration shoegear-rail system under different initial contact forces explore dynamic system. Therefore, according structure system, a coupling model established this paper. On basis model, numerical simulation carried out, finally data are obtained. The results show that with...
Recently, [Formula: see text]-based compounds have aroused intensive research interest due to their metal-like ductility, high shape-conformability, and decent thermoelectric (TE) performance at room temperature. The melting–annealing method is commonly adopted prepare compounds. Compared with the method, mechanical alloying (MA) has advantages of short period low cost, but it not been ductile Herein, we successfully text] compound by using MA method. as-prepared products are small spheres a...
By using equi-frequency contour analysis and finite-difference time-domain simulation, self-collimation for TE- TM-polarizations are achieved at the same frequency in two dimensional 32,4,3,4 Archimedean photonic crystals. The bends beam splitters realized by truncating an air block It is observed that line defect can produce a tunable one-to-two splitter controlling width of block. A bend 1 ∶1 TM- polarization designed respectively, both have high efficiency. This study proposes new design...
A new electro-hydraulic high-frequency flutter generator is designed and simulated. This paper introduced the structure working principle of firstly, then established mathematical model generator. From simulation waveform, cutting force as tool to withstand 8000N, amplitude reaches 6μm, which fully meet requirements VAM, provide VAM technology research application with a way.
Double-sided polishing machine is widely used to high precision dimension, accuracy surface, and ultra-smooth surface without damage layer for some hard brittle workpiece such as silicon wafer, sapphire, ceramic, magnetic substrates, electronic materials, etc. Pneumatic loading system the very crucial part of double-sided machine. The machine’s performances are directly determined by precision. This paper establishes modeling simulation pneumatic load AMESim then gives optimization...
This paper introduces the test results of flexural performance CF40 steel fiber reinforced concrete (SFRC) designed by binary superposition mix design method. The strength and load ~ deflection curves were got from SFRC specimens with different fraction volume thickness cement paste wrapping fibers. effects on toughness are analyzed. It is demonstrated that increases increase volume, reasonable fibers 1.0mm.
The calcium fluoride (CaF 2 ) whispering gallery mode crystalline resonator is an excellent platform for nonlinear optical applications because of the decreasing in threshold caused by ultrahigh quality ( Q factor. In this paper, we achieved observation Raman lasing, first-order comb, and second-order lasing a CaF disk with diameter 4.96 mm ultrahigh- 8.43×10 8 at 1550-nm wavelength. We also observed thermal effects resonator, thermo-optical oscillation approximately coincident since...