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 nm, and 527 nm, respectively. To the best of our knowledge, the laser facility is the first one which produces three beams with different pulse widths and wavelengths. An optical synchronization technique, combining super continuum generation and femtosecond optical parametric amplification, was developed to ensure three beams are from the same source to achieve precise synchronization. The femtosecond beam is a double chirped-pulseamplification Ti:sapphire laser which applies cross-polarized wave generation to improve the temporal contrast. The picosecond/nanosecond beams utilize the optical parametric amplification + Nd:glass mixed amplification scheme. The output energy and pulse width of the three beams are 20.1 J/26.8 fs, 370.2 J/0.48 ps (shortest), and 575.4 J/1.0 ns, respectively. The smallest synchronization time (peak-to-valley) and the shot-to-shot timing jitter (peak-topeak) of less than 1.32 ps have been achieved for the femtosecond and picosecond beams.

We report experimental research on laser plasma interaction (LPI) conducted in Shenguang laser facilities during the past ten years. The research generally consists of three phases: (1) developing platforms for LPI research in mm-scale plasma with limited drive energy, where both gasbag and gas-filled hohlraum targets are tested; (2) studying the effects of beam-smoothing techniques, such as continuous phase plate and polarization smoothing, on the suppression of LPI; and (3) exploring the factors affecting LPI in integrated implosion experiments, which include the laser intensity, gas-fill pressure, size of the laser-entrance hole, and interplay between different beam cones. Results obtained in each phase will be presented and discussed in detail.

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We report a novel, to the best of our knowledge, mode-tunable optical vortex generation method based on a mirror curvature dynamically controlled Z-shaped resonant cavity, a mode conversion beamline, and a reference laser beamline. By changing the mirror curvature of an intra-cavity deformable mirror (DM) at a certain pumping voltage and current, various Hermite–Gaussian (HG) mode beams were obtained in the Z-shaped resonant cavity of a laser diode pumped Yb:CALGO laser. The vortex beams were realized finally by using an external cavity astigmatism converter. In the experiment, the dynamic tuning of the 1st to 9th order HG mode beams and Laguerre–Gaussian mode vortex beams carrying different orbital angular momenta, ranging from 1 ℏ to 9 ℏ were achieved by dynamically adjusting the driving voltage of the DM.