A5100758855- Solid State Laser Technologies
- Photorefractive and Nonlinear Optics
- Laser Material Processing Techniques
- Laser-Matter Interactions and Applications
- Laser-Plasma Interactions and Diagnostics
- Laser-induced spectroscopy and plasma
- Optical Systems and Laser Technology
- Nonlinear Optical Materials Research
- Laser Design and Applications
- Advanced Fiber Laser Technologies
- Ocular and Laser Science Research
- Luminescence Properties of Advanced Materials
- Nonlinear Optical Materials Studies
- Surface Roughness and Optical Measurements
- Crystal Structures and Properties
- Spectroscopy and Laser Applications
- Adaptive optics and wavefront sensing
- Spectroscopy Techniques in Biomedical and Chemical Research
- Solid-state spectroscopy and crystallography
- Photonic Crystal and Fiber Optics
- High-pressure geophysics and materials
- Atmospheric Ozone and Climate
- Mineral Processing and Grinding
- Inorganic and Organometallic Chemistry
- Astronomical Observations and Instrumentation
Shanghai Dianji University
2024
State Grid Corporation of China (China)
2024
China Academy of Engineering Physics
2012-2023
University of Jinan
2023
China University of Petroleum, East China
2022
Sichuan University
2006-2022
University of Chinese Academy of Sciences
2019-2021
Xi'an Institute of Optics and Precision Mechanics
2019-2021
Xi'an Jiaotong University
2020
Harbin Institute of Technology
2019
SG-III laser facility is now the largest driver for inertial confinement fusion research in China. The whole can deliver 180 kJ energy and 60 TW power ultraviolet onto target, with balance better than 10%. We review system introduce performance here.
The SG-Ⅲ laser facility (SG-Ⅲ) is the largest driver for inertial confinement fusion (ICF) researches in China, which has 48 beamlines and can deliver 180 kJ ultraviolet energy 3 ns. In order to meet requirements of precise physics experiments, some new functionalities need be added intrinsic performances upgrade. So at end SG-Ⅲ's engineering construction, 2-year performance upgrade project started. This paper will introduce newly latest SG-Ⅲ. With these function extensions upgrade, now...
In current inertial confinement fusion (ICF) facilities, KDP and DKDP crystals are the second harmonic generation (SHG) third (THG) materials for Nd:glass laser (1053 nm). Based on trend development of short wavelengths ICF driving lasers, technical solutions fourth (FHG) will undoubtedly attract more attention. this paper, rapid growth an ADP crystal non-critical phase-matching (NCPM) FHG a 1053-nm using reported. The NCPM temperature is 33.7°C. conversion efficiency from 526 to 263 nm 70%...
We report experimental research on laser plasma interaction (LPI) conducted in Shenguang facilities during the past ten years. The generally consists of three phases: (1) developing platforms for LPI mm-scale with limited drive energy, where both gasbag and gas-filled hohlraum targets are tested; (2) studying effects beam-smoothing techniques, such as continuous phase plate polarization smoothing, suppression LPI; (3) exploring factors affecting integrated implosion experiments, which...
The excess accumulation of charges in the fluidized bed has a severe impact on hydrodynamics. Due to lack effective experimental methods, electrostatic effects hydrodynamics have mostly been studied using numerical simulation. By injecting trace liquid antistatic agents into bed, were controlled and influences particle motions investigated. average particle–wall angles are acquired by developing multiscale wavelet decomposition acoustic emission signals. significantly influenced both charge...
We report a high-intensity laser facility named Xingguang-III that generates femtosecond, picosecond, and nanosecond beams with three wavelengths, i.e. 800 nm, 1053 527 respectively. To the best of our knowledge, is first one which produces different pulse widths wavelengths. An optical synchronization technique, combining super continuum generation femtosecond parametric amplification, was developed to ensure are from same source achieve precise synchronization. The beam double...
High-efficiency frequency conversion into the deep ultraviolet in a partially deuterated ammonium dihydrogen phosphate (ADP) crystal is reported. For 60% ADP crystal, spontaneous Raman scattering intensity decreased by 38% compared with that of pristine crystal. At room temperature (24°C), noncritical phase-matching fourth harmonic generation 1053 nm laser was realized. The angular acceptance 55.7 mrad, and external efficiency from 526 to 263 reached 85.3%.
We propose a process to evaluate the safe limit of large-aperture DKDP crystals associated with transverse stimulated Raman scattering (TSRS) at wavelength 351 nm. The crystals' safety can be assured by controlling intensity TSRS-scattering light same order that Rayleigh-scattering light. use an optical fiber sensor system detect side-scattering in and compare between Raman- By defining threshold as condition which ratio Raman-scattering exceeds 1, we obtain approximately 2.6 GW/cm2 our...
Laser-induced damage is a key lifetime limiter for optics in high-power laser facility. Damage initiation and growth under 351 nm high-fluence irradiation are observed on larger-aperture fused silica optics. The input surface of one component damaged most severely an explanation presented. Obscurations the area scratch it found to grow exponentially with shot number. site grows linearly. Micrographs sites support micro-explosion model which could be used qualitatively explain phenomena.
The influence of laser beam size on laser-induced damage performance, especially probability and the threshold (LIDT), is investigated. It found that dependent when various precursors with different potential behaviors are involved. This causes LIDT to be between cases under a large-aperture small-aperture beam. Moreover, fluence fluctuation brings out hot spots, which move randomly across from shot shot. Thus this leads most probable maximum after many shots at any location optical...
A Thomson scattering diagnostic system, using a 263 nm laser as the probe beam, is designed and implemented on Shenguang-III prototype facility. The beam provided by an additional line completed recently. system allows simultaneous measurements of both ion feature red-shifted electron from plasmas in high-temperature (≥2 keV) high-density (≥10(21) cm(-3)) regime. Delicate design made to satisfy requirements for successful detection feature. High-quality spectra have already been diagnosed...
Samples in the crystal directions of Z, X(ab) and non-critical phase matching angle (θ = 90°,φ 45°) were gained from high-quality ammonium dihydrogen phosphate (NH4H2PO4, ADP) crystals grown Z direction defined crystallographic 90°, φ via rapid growth method. Z-scan measurements with pico-second pulse laser irradiation at λ 355nm implemented to systematically investigate their nonlinear characters, such as absorption coefficient β, refractive index n2 third order susceptibility χ(3). The...
An ultraviolet Thomson-scattering system has been designed and implemented on the Shenguang-III laser facility, a 48-beam, 3ω (351 nm), 180 kJ-level driver for high energy density physics inertial confinement fusion researches. The 4ω (263.3 nm) probe beam of is injected from north pole (top) target chamber, with an assistant beam-pointing monitor to achieve pointing accuracy. Thomson-scattered light collected by double-Cassegrain optical transmission system, which provides achromatic image...
Deuterated potassium dihydrogen phosphate damage performance at 351 nm is studied on a large-aperture laser system. Bulk and rear-surface are initiated under the 3ω fluences of 6.7 J/cm2 3 J/cm2, show different growth characteristics multiple irradiations with fluence 6 J/cm2. The size number bulk keep unchanged once initiated. However, surface also does not grow, while increases linearly shots. Different thresholds behaviors suggest formations precursors. cause supposed to be near-surface...
Polarization smoothing (PS) is highly desired for inertial confinement fusion, high-power laser facilities. A self-PS technique based on 2×2 beam array and type II+II third-harmonic generation (THG) system proposed in this paper. This scheme takes advantage of a THG system, which induces 35° angle between the polarization states output input fundamental laser. It rotates two systems by 180° to obtain 70° sets lasers. Simulation results show that intensity contrast overlapped focal spot can...
Based on the existing design in our prototype laser facility, third-harmonic generation of phase modulated broadband 0.3 nm and narrowband lasers are theoretically analyzed experimentally studied this paper. The output (THG) characteristics such as conversion efficiency, spectrum distribution intensity modulation compared detail. It is found that THG efficiencies for fundamentally identical without narrowing. In addition, interrelationship between efficiency incident fundamental light both...