A5028530221- Advanced Fiber Laser Technologies
- Solid State Laser Technologies
- Advanced Measurement and Metrology Techniques
- Laser Design and Applications
- Advanced Fiber Optic Sensors
- Advancements in Battery Materials
- Supercapacitor Materials and Fabrication
- Semiconductor Lasers and Optical Devices
- Optical measurement and interference techniques
- Advanced Measurement and Detection Methods
- Photorefractive and Nonlinear Optics
- Advanced Battery Technologies Research
- Advanced Frequency and Time Standards
- Photonic and Optical Devices
- Optical Systems and Laser Technology
- Orbital Angular Momentum in Optics
- Advanced Battery Materials and Technologies
- Geophysics and Sensor Technology
- Mineral Processing and Grinding
- Electromagnetic Launch and Propulsion Technology
- Analytical Chemistry and Sensors
- Digital Imaging for Blood Diseases
- Digital Holography and Microscopy
- Advanced battery technologies research
- Image Processing Techniques and Applications
Jilin University
2024
State Key Laboratory of Superhard Materials
2024
Xi'an University of Technology
2010-2023
Tsinghua University
1996
Coal gangue image recognition is a critical technology for achieving automatic separation in coal processing, characterized by its rapid, environmentally friendly, and energy-saving nature. However, the response characteristics of vary greatly under different illuminance conditions, which poses challenges to stability feature extraction recognition, especially when strict requirements are necessary. This leads fluctuating accuracy industrial environments. To address these issues improve...
Dual-ion batteries (DIBs) are becoming an important technology for energy storage. To overcome the disadvantages of traditional electrodes and electrolytes, here we assemble a dual-carbon DIB with nanodiamond (ND)-modified crimped graphene (DCG) electrolyte. The DCG anode cathode realize high capacities 1121 mA h g
Abstract Organic potassium salts are the promising green activators for synthesizing porous carbon materials energy storage. Herein, we report synthesis of hierarchical material derived from mixture soluble starch and ethylenediaminetetraacetic acid dipotassium salt dihydrate (EDTA‐2K) via carbonization activation strategy. The sample is used as supercapacitors electrode, which exhibits superior mass specific capacitance (307.3 F g −1 at 1 A ), good rate performance (255.0 10 excellent...
Phase unwrapping in regions of abnormal fringes remains an unresolved issue. In this paper, we present approach that combines image-inpainting strategy based on adaptive window which is obtained according to the density and orientation fringe patterns a quality-guided algorithm for phase unwrapping. First, threshold set quality map detect target region. Second, region filled with new values by method. Then, applied newly generated wrapped map. Finally, postprocessing unwrapped result...
The coherent noise always exists in digital holographic microscopy due to the laser source, degrading image quality. A method of speckle suppression using dynamic illumination, produced by double-moving diffusers, is presented microscopy. space–time correlation functions are theoretically analyzed from statistics distribution doubly and singly scattered system, respectively. configuration diffusers demonstrated have better performance compared with single diffuser moving-static double cases....
An intracavity, second-harmonic generation, tunable, dual-frequency, passively Q-switched Nd:YAG laser based on a T-resonator configuration with polarization splitting is proposed, whose frequency difference could be doubled in comparison fundamental lasing. The Nd:YAG, Cr4 + : YAG, and potassium titanyl phosphate (KTP) crystals were set at the shared arm, which considerably reduce thermal fluctuation pulse timing jitter between dual-frequency lasers. One birefringent filter consisting of...
A T-shaped cavity dual-frequency Nd:YAG laser with electro-optical modulation is proposed, which consists of both p- and s-cavities sharing the same gain medium Nd:YAG. Each was not only able to select longitudinal mode but also tune frequency using an electro-optic birefringent filter polarization beam splitter + lithium niobate. The difference dual tuned through whole bandwidth Nd:YAG, far above usually accepted free spectral range value in case a single-axis laser. As result, simultaneous...
This study experimentally reveals the self-biasing phenomenon in prism laser gyros. When gyro operates a specific double longitudinal mode and four-frequency oscillation state, can detect normal angular velocity component of Earth's rotation without dithering, status is induced. In this study, laboratory platform established. The two modes oscillate on both sides gain curve. intensity ratio strong weak about 1.4 to 1, coupling effects these with parallel linear polarization have been...
To obtain the dual-frequency laser output with large and tunable frequency difference, a design scheme of Nd:YAG two standing-wave cavities sharing common gain medium has been proposed, which is based on principles polarization splitting single longitudinal mode selection intracavity Fabry–Perot etalon. With each containing piece etalon, p- s-polarized components at 1064 nm will be forced to oscillate simultaneously in linear right-angle cavities, respectively. As result, orthogonally...
To stabilize the frequency difference of two-cavity dual-frequency Nd:YAG laser at 1064 nm, a scheme phase modulation orthogonally and linearly polarized using single electro-optic modulator has been proposed, frequency-difference stabilizing system for based on single-modulator quadrature-demodulated Pound–Drever–Hall (SM-QD-PDH) method designed established. The characteristics modulation, discrimination, stabilization, stabilization with ∼24 GHz nm have investigated experimentally....
Proposed for the first time to our knowledge is a novel scheme of diode-pumped birefringent dual-frequency Nd:YAG laser, whose resonant cavity contains piece versatile element: crystal quartz Fabry-Perot etalon, acting as mode selector and splitter well reference stabilizing frequency-difference. The laser will oscillate simultaneously in two linearly orthogonally polarized modes spaced 5-GHz, corresponding synthetic wavelength approximately 60-mm, which suitable absolute-distance...
Optical vortex beam has wide applications in areas of optical communication, lidar detection and trapping. To increase the operating distance, a high-power laser source is necessary these applications. However, purity output decreases with pump power increasing due to thermal effect medium. Therefore, modal field degeneration induced by medium become key problem solid-state laser. investigate this degeneration, heat transfer deformation model an annular end pumped thin-disk (Fig. (a))...
Lithium-ion battery (LIB) is a type of rechargeable energy storage system having been successfully applied in various fields. Improving the performance LIBs relies significantly on innovative and highly effective anode materials. In this study, porous carbon materials were prepared derived from camellia oleifera seed shells modulated with nanodiamond (ND) through hydrothermal carbonization method. The structure embedded NDs used as achieving abundant active sites, high specific capacities,...