A5032475427- Photonic Crystal and Fiber Optics
- Advanced Fiber Optic Sensors
- Advanced Fiber Laser Technologies
- Optical Network Technologies
- Pulsars and Gravitational Waves Research
- Industrial Gas Emission Control
- Photonic and Optical Devices
- Catalytic Processes in Materials Science
- Ammonia Synthesis and Nitrogen Reduction
- Radio Astronomy Observations and Technology
- Remote-Sensing Image Classification
- Advanced Optical Sensing Technologies
- Advanced Sensor and Energy Harvesting Materials
- Spectroscopy and Laser Applications
- Semiconductor Lasers and Optical Devices
- Aerosol Filtration and Electrostatic Precipitation
- Advanced Control Systems Optimization
- Geophysics and Sensor Technology
- Cosmology and Gravitation Theories
- Solid State Laser Technologies
- Process Optimization and Integration
- Phase-change materials and chalcogenides
- Orbital Angular Momentum in Optics
- Military Defense Systems Analysis
- Research in Cotton Cultivation
Beijing Institute of Nanoenergy and Nanosystems
2025
Chinese Academy of Sciences
2015-2025
Inner Mongolia University of Technology
2025
Institute of Computing Technology
2025
Xi'an Jiaotong University
2017-2024
Henan University
2011-2024
Xi’an University of Posts and Telecommunications
2024
Dalian University
2024
Dalian University of Technology
2024
Xi'an Institute of Optics and Precision Mechanics
1991-2023
The present work reports on a feasibility study commissioned by the Chinese Academy of Sciences China to explore various possible mission options detect gravitational waves in space alternative that eLISA/LISA concept. Based relative merits assigned science and technological viability, few representative descoped from ALIA are considered. A semi-analytic Monte Carlo simulation is carried out understand cosmic black hole merger histories starting intermediate mass holes at high redshift as...
We present a method for the spectral combination of fiber lasers with high density, increasing density utilization no degradation in beam quality, and decreasing single channel narrow linewidth output power. Experiments demonstrating utility our are described. The results show that we achieved 32-channel laser combining (SBC) quality M2 = 1.68. SBC can be constantly optimized by integrally varying interval feedback system. Our offers point reference to broadening additional channels...
Abstract Wave energy is a promising sustainable yet to be fully exploited due the low frequency and broad‐banded wave fields, so much that difficult capture, resulting in efficiency limited power output from current many harvesters. Here, topological defect gyro‐multigrid triboelectric nanogenerator (TD‐GM‐TENG) proposed harnesses mechanical of ocean waves generate electricity promotes accumulation charge on basis realized high rotation speed under precession gravitation acceleration...
A high-power Yb/Ce co-doped double-clad fiber with low optical loss was successfully fabricated by an optimized chelate gas phase deposition technique. It exhibits a nearly homogenous distribution of Al, Ce and Yb ions in the core region, which reduce clustering. The attenuation at 1080 nm 1383 are 12 dB/km 46 dB/km, respectively, indicating high performance loss. amplifier stage this delivers 4.62 kW excellent beam quality (M2 = 1.67) laser output slope efficiency 80.3%. experimental...
Segmented Planar Imaging is an advanced technology for ultra-thin, high-resolution imaging with photonic integrated circuit (PIC). In this paper, a segmented planar imager novel hierarchical multistage sampling lens array proposed, which can effectively improve the of low and medium frequency information. Based on architecture, full-chain signal level model system established, considering fill factor wavelength spacing arrayed waveguide grating in PICs. The simulation results show that...
Building change detection (CD) from remote sensing images (RSI) has great significance in exploring the utilization of land resources and determining building damage after a disaster. This paper proposed an attention-based multi-scale input-output network, named AMIO-Net, for CD high-resolution RSI. It is able to overcome partial drawbacks existing methods, such as insufficient information (details edges) original poor effect small targets (small-scale buildings or small-area changed that...
In response to the demand for real-time simulation of air-to-air missile attack by rapid change air combat situation, computational strategy zone using cut-line method is proposed. Firstly, conditions eventually destroy target are determined, secondly, far boundary calculated method, and finally that satisfies destruction obtained For successive calculation in course flight carrier aircraft, warm-up proposed based on results first two times used as initial value method. This will further...
We propose a high-gain fiber amplifier based on tandem pump cavity tailored for small-signal lasers. The laser can obtain high gain when passing through the and is then be continuously amplified by core-pumping process. In our experimental setup, 50 μW signal to 128.5 W, achieving maximum of 64 dB, surpassing conventional capabilities. This approach offers promising pathway toward realizing compact, reliable, cost-effective amplifiers.
Droplet microfluidics provides powerful tools for biochemical applications. However, precise fluid control is usually required in the process of droplet generation and detection, which hinders droplet-based applications point-of-care testing (POCT). Here, we present a reinjection method capable distribution without external pumps by droplets can be passively aligned detected one at intervals. By further integrating surface-wetting-based chip, an integrated POrtable system (iPODs) developed....
Gravitational wave detection is now more than a mere verification of Einstein’s relativity. It opens brand-new window to explore gravitational astronomy, therefore attracts increasing attention scientists from all over the world. Focusing on space laser interferometer detection, we give comprehensive review its scientific objectives, recent status and key technologies. With arm-length being million kilometers, detector works within frequency band 0.1mHz to10Hz. Its possible sources include...
Abstract Mode distortion induced by stimulated Raman scattering (SRS) has become a new obstacle for the further development of high-power fiber lasers with high beam quality. Here, an approach effective suppression SRS-induced mode in amplifiers been demonstrated experimentally adjusting seed power (output source) and forward feedback coefficient rear port source. It is shown that threshold can be increased significantly reducing or coefficient. Moreover, it also found extremely sensitive to...
Single-flux-quantum (SFQ) digital circuitry has great potential in building a scalable control system of superconducting qubits. In this work, we describe practical SFQ-based two-qubit gate for transmon The controlled-$Z$ (CZ) is activated by near-resonant SFQ-pulse trains near the target transition involving second excited state. Numerical simulations show that fidelity SFQ-activated CZ excess 99.9% achievable within 100-ns time. We evaluate error caused leakage and width. Combined with...
Based on Dammann vortex grating and adaptive gain stochastic parallel gradient descent algorithm, we theoretically proposed a phase control technology scheme of the coherent beam combining system for generating perfect vectorial beams (VVBs). The simulated results demonstrate that discrete locking different types VVBs (including beams, vector generalized VVBs) can be successfully realized. intensity distributions, polarization orientation, Pancharatnam phases, widths |Hm,n〉 states with...
The NO. 3 coal seam of the Weiqiang coalmine is faced with a water inrush threat caused by two large reservoirs and upper confined aquifer. However, existing empirical formulas cannot accurately predict height fractured water-conducting zone; thus, it necessary to investigate extent zone according geological conditions No. seam. microseismic monitoring system (MMS) was used monitor surrounding area 1311 working face in real time obtain event information during fracture development. detailed...
A four-wave mixing effect on high-power continuous-wave fiber lasers has been demonstrated theoretically and experimentally. Detailed theoretical description of phase matching is presented we found that the condition satisfied at frequency shift 5.16 THz. While intensity in core region more than about 394 MW/cm 2 , products 1100 nm 1060 were also observed all-fiber laser. The comparison shows experiment result good agreement with simulation result. In addition, beam quality deterioration for...
A high pumping-power fiber combiner for backward pumping configurations is fabricated and demonstrated by manufacturing process refinement. The pump power handling capability of every can extend to 600 W, corresponding the average coupling efficiency 94.83%. Totally, 2.67-kW output with beam quality factor M2 1.41 was obtained, using this in amplifier experimental setup. In addition, temperature splicing region less than 50.0°C designed under action circulating cooling water. results prove...
High-power fiber lasers have been widely explored in engineering and science, improving the beam quality restricted by transverse mode instability (TMI) is waiting to be solved for extra high-power applications. Here, we theoretically propose a phase transition model understanding TMI oscillator. A general dynamics describing established modifying heat equation, then special of two-mode (TMF) oscillator obtained applying this TMF case. Theoretical analysis shows that there reversible point...