Fig. 1. Laser parameters of Kunwu lasers: (a) measured pulse waveform; (b) integral spectrum of broadband and narrowband lasers; (c) measured time spectral distribution of broadband laser.

Fig. 2. Schematic of experimental setup.

Fig. 3. X-ray images of focal spots under (a)–(c) narrowband and (d)–(f) broadband laser conditions. (a) and (d) Images under point-focusing conditions. (b) and (c) Images obtained with 150CPP. (c) and (f) Images obtained with 200CPP.

Fig. 4. Broadband and narrowband laser-driven BSBS integrated spectra and the spectra of the incident laser.

Fig. 5. Relationship between BSBS energy ratio and laser intensity on target surface.

Fig. 6. Laser-driven BSRS integrated spectra at different laser intensities: (a) narrowband; (b) broadband.

Fig. 7. Time-resolved spectral resolution signals of BSRS at laser intensity 9 × 10¹⁴ W cm⁻², as measured by spectrometers and streak cameras: (a) narrowband; (b) broadband.

Fig. 8. Time-resolved spectral integral signals of BSRS, as measured by photocell and oscilloscope.

Fig. 9. Relationship between energy ratio of BSRS and laser intensity on target surface.

Fig. 10. Energy spectrum of hot electrons in front of the target under broadband and narrowband laser conditions from different shots at the same laser intensity.

Fig. 11. Relationship between energy share of hot electrons and laser intensity (a) behind and (b) in front of the target.

Fig. 12. Hot-electron energy spectra for different target thicknesses in front of the target.

Fig. 13. Typical lateral LPI spectral information, as measured by lateral optical fiber probe, containing a strong SBS peak and a very weak SRS signal. The corresponding detection angle was 25°.

Fig. 14. Energy information of SBS at different scattering measurement angles.

Fig. 15. SRS spectrum in (a) the 15° and (b) the 25° directions.