Junpu Zhao
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View article: Beam shaping for complex laser systems via a multi-stage dynamic convergence strategy
Beam shaping for complex laser systems via a multi-stage dynamic convergence strategy Open
In complex laser systems, such as those used in inertial confinement fusion, achieving high-quality beam shaping is crucial yet challenging. This paper presents a multi-stage dynamic convergence strategy to mitigate near-field non-uniformi…
View article: A novel testing method of beam pointing accuracy for high-power laser facility
A novel testing method of beam pointing accuracy for high-power laser facility Open
View article: Time-Resolved Spectral Compensation Method for Fm-to-Am Mitigation in Laser Systems
Time-Resolved Spectral Compensation Method for Fm-to-Am Mitigation in Laser Systems Open
View article: Ultraviolet spectral broadening by stimulated rotational Raman scattering on nitrogen pumped with signal laser injection
Ultraviolet spectral broadening by stimulated rotational Raman scattering on nitrogen pumped with signal laser injection Open
We present experimental results on kilojoule ultraviolet laser output with 1% spectral broadening. Through stimulated rotational Raman scattering (SRRS) with signal laser injection, we achieve effective spectral broadening in short-range p…
View article: Spectral Failsafe System of High-Power Laser Using Dual Fiber Bragg Gratings
Spectral Failsafe System of High-Power Laser Using Dual Fiber Bragg Gratings Open
Phase-modulated (PM) spectral failsafe systems are necessary to promptly terminate amplification processes following accidental seeding of a high-power laser chain with a non-PM pulse to prevent optical damage. In this work, we present a r…
View article: The spatial phase transition of micro/nano particles and its effect on the cleaning efficiency of laser-plasma shock wave cleaning
The spatial phase transition of micro/nano particles and its effect on the cleaning efficiency of laser-plasma shock wave cleaning Open
Plasma cleaning is an effective method for removing micro/nanoparticle particles, thus solving the pollution problem of micro/nanoparticle instruments. However, the lack of research on the phase transition evolution law of micro/nanopartic…
View article: Laser-induced plasma irradiation driven rapid photocatalytic degradation of methylene blue with TiO<sub>2</sub> nanoparticles
Laser-induced plasma irradiation driven rapid photocatalytic degradation of methylene blue with TiO<sub>2</sub> nanoparticles Open
A light source from a neodymium-doped yttrium aluminium garnet laser (1064 nm) was used to excite the A3 iron plate to produce plasma and release UV light for the rapid photocatalytic degradation of methylene blue (MB) dye. The 30 nm anata…
View article: Research on the growth interfaces of pyramidal and prismatic sectors in rapid grown KDP and DKDP crystals
Research on the growth interfaces of pyramidal and prismatic sectors in rapid grown KDP and DKDP crystals Open
Rapid grown KDP and DKDP crystals have obvious phase jump at the pyramid–prism (PY-PR) interfaces, which will give rise to intensity modulation to the propagation beam. In this paper, the basic properties of phase jump at the PY-PR interfa…
View article: Beam alignment based on two-dimensional power spectral density of a near-field image
Beam alignment based on two-dimensional power spectral density of a near-field image Open
Beam alignment is crucial to high-power laser facilities and is used to adjust the laser beams quickly and accurately to meet stringent requirements of pointing and centering. In this paper, a novel alignment method is presented, which emp…
View article: Process-oriented adaptive optics control method in the multi-pass amplifiers
Process-oriented adaptive optics control method in the multi-pass amplifiers Open
In this talk, we propose and demonstrate the process-oriented adaptive optics (AO) wavefront control method, for optimizing the beam quality in the multi-pass amplifiers. Different from the conventional target-oriented wavefront control ap…
View article: Ductile and electronic properties of La-doped gamma-TiAl systems based on density functional theory
Ductile and electronic properties of La-doped gamma-TiAl systems based on density functional theory Open
Because of the low density, high specific strength and excellent performance at high temperature, -TiAl based alloy has become a new generation of materials in the aeronautic field. However, its poor ductility at room temperature set a lim…
View article: Shannon entropy method of small-scale self-focusing assessment in high-power laser systems
Shannon entropy method of small-scale self-focusing assessment in high-power laser systems Open
Through analysis of near-field beam profiles, we propose a method using Shannon entropy to assess the development of small-scale self-focusing during laser propagation and amplification in high-power laser systems. In this method, the entr…