A5100667890- Laser Material Processing Techniques
- Solid State Laser Technologies
- Advanced Fiber Laser Technologies
- Advanced Surface Polishing Techniques
- Laser Design and Applications
- Photonic and Optical Devices
- Gyrotron and Vacuum Electronics Research
- Advanced Fiber Optic Sensors
- Laser-Plasma Interactions and Diagnostics
- Laser-induced spectroscopy and plasma
- Laser-Matter Interactions and Applications
- Ocular and Laser Science Research
- Surface Roughness and Optical Measurements
- Photonic Crystal and Fiber Optics
- Toxic Organic Pollutants Impact
- Particle Accelerators and Free-Electron Lasers
- Atmospheric chemistry and aerosols
- Semiconductor Lasers and Optical Devices
- Photonic Crystals and Applications
- Microwave Engineering and Waveguides
- Pulsed Power Technology Applications
- Atomic and Subatomic Physics Research
- Plasmonic and Surface Plasmon Research
- Financial Distress and Bankruptcy Prediction
- Pesticide and Herbicide Environmental Studies
Chinese Academy of Sciences
2009-2023
Shanghai Institute of Optics and Fine Mechanics
2011-2023
Institute of Microelectronics
2023
Harbin Institute of Technology
2015-2022
Hubei University of Technology
2022
National University of Defense Technology
2019-2021
University of Electronic Science and Technology of China
2020
Chongqing Normal University
2019
China Academy of Engineering Physics
2018
University of Chinese Academy of Sciences
2017
We experimentally demonstrate the generation of an array optical bottle beams by employing multiple self-accelerating Airy beams.This kind is created superimposing eight along a circle, all with inward acceleration directed towards center.In addition, we stable trapping absorbing glassy carbon particles using proposedoptical array.
The mass spectrometry analysis of oxygenated volatile organic compounds (OVOCs) remains challenging due to their limited ionization efficiencies. In this study, we surprisingly found that, under vacuum-UV (VUV) excitation, a gaseous mixture CH2Cl2/H2O/analyte in N2 buffer generated large amounts H3O+ and protonated analyte even when the photon energy was lower than neutral species involved. contrast those obtained with VUV photoionization alone, signal intensities organics can be amplified...
We propose and experimentally demonstrate a multi-wavelength thulium-doped fiber (TDF) laser based on all-fiber Mach-Zehnder interferometer (MZI) at 1.9 mm.Here segment of 4 m single-mode TDF is pumped by 1568 nm for 2 mm band optical gain.The MZI includes two cascaded 3 dB coupler.A 3.5 long un-pumped polarization-maintaining polarization controller (PC) are joined in the ring cavity to suppress mode competition.Multi-wavelength lasers with wavelength number from one four obtained adjusting...
We present and investigate a hybrid laser-based method of surface shaping for damage mitigation on fused silica surfaces. Damage sites were removed precisely shaped into an optically-benign cone by procedure femtosecond laser ablation with subsequent CO2 polishing process. The morphology the rim was quantitatively predicted numerical model. Since heat-affected zone (HAZ) process effectively confined optimization parameters, dimensions raised reduced order magnitude. intensity on-axis hotspot...
A high power laser system was used to drive the ignition of inertial confinement fusion (ICF), which energy, uniform focal spot, accurate waveform, and synchronization between beams are key parameters. To accomplish this, global characteristics control should be assured, main purpose injection system. In this paper, technological progress involved in improvement performance SG-II is reported, including frequency domain control, time near-field spatial shaping, pre-amplifier technology,...
A 1.7 μm band tunable narrow-linewidth Raman fiber laser based on spectrally sliced amplified spontaneous emission (SS-ASE) and multiple filter structures is proposed experimentally demonstrated. In this scheme, an SS-ASE source employed as a pump in order to avoid stimulated Brillouin scattering. The ring configuration includes 500 m long high nonlinear optical 10 km dispersion shifted the gain medium. segment of un-pumped polarization-maintaining erbium-doped used modify shape spectrum....
Large overmoded coaxial mymargin slow wave structure was adopted to overcome the problems of low power capacity and narrow electron beam channel in V-band. Based on simulation design Cerenkov oscillator, experimental research carried out this letter. The output microwave with 226 MW, pulse width 18 ns, frequency 63.2 GHz can be measured, corresponding efficiency is 23%. influence voltage magnetic field generation also studied. principle consistent design.
Processing of aramid fiber reinforced plastics (AFRP) with traditional cutting or milling methods usually result in low machining accuracy and poor edge quality. In this paper, ultrafast laser ablation AFRP was systematically implemented to test its applicability for the material processing. The responses pulse lengths, fluence, repetition rates were carefully studied. It is found that single volume removal rate, efficiency, ablated surface roughness are positive correlation rates. Sample...
Purpose – This paper aims to analyze the different impacts of monetary policy on financing constraints diverse enterprises from China by introducing concepts external and internal management factors, investment efficiency these with help “Hayek Triangle”. Design/methodology/approach Based concept human action, this builds an empirical model which is remarkably previous related researches conducts test using chosen sample data 312 Chinese listed private companies 2003 2012. Findings shows...
Optical damages, which severely degrade the output energy performance of Nd:glass regenerative amplifiers, are discussed in detail this paper. By a series experiments, it has been confirmed that these damages result from laser-induced contamination. Based on work, several improvements made to boost amplifier. The amplifier after declines 4% 1000 h operation, much less than used to, 60% 560 operation.
In this paper, a numerical model based on the finite-element method for predicting morphological evolution during CO2 laser ablation fused silica is developed and examined experimentally. Adopting optimized parameters that were obtained from model, typical cone-shaped multi-stage structure with diameter of 2 mm slope angle 10.4° was sufficiently polished. Both roughness transparency surface significantly improved. The characterized continuous exactly consistent predicted value, depth 32 ±...
Abstract Miniaturization is one of the important research directions low frequency high power microwave sources. This paper presents a three-period coaxial slow-wave structure L-band high-power source. Because Quasi-TEM mode has no cut-off frequency, radial size device can be reduced. At same time, in order to reduce transverse dimension, extractor introduced realize longitudinal selection and improve conversion efficiency device. In simulation, obtains output with central 1.53 GHz, average...
We report on an Nd:glass large-mode rod regenerative amplifier with a pulse energy of 125 mJ at 1053 nm. The contains linear-type resonator, which is designed in Stability Zone II misalignment sensitivity factor 12.9 m. A method proposed for analyzing the mode displacement gain media to cavity misalignment, and optimum solution compensation obtained applied amplifier. exhibits excellent stability fluctuation 0.47% (RMS) within 7 h high spatial beam quality <mml:math...
To clarify whether the blocking reaction sites problem has a significant impact on heterogeneous reactions, experiments contrasting order of pyrene (PY) particles' exposure to N<sub>2</sub>O<sub>5</sub>–O<sub>3</sub> or O<sub>3</sub>–N<sub>2</sub>O<sub>5</sub> in process were conducted.
We build the bridge between fiber parameters and mode-coupling crosstalk for a graded-index six-mode fiber. Simulations show that -40dB crosstalk-level can be achieved through small core size, refractive-index value eccentricity.