Fig. 1. Injection-controlled GARPUN operation. (a) Input and output laser pulses (not to scale). (b)–(d) Streak camera images of far-field output radiation: (b) without injection; (c) with injection; (d) of the injected radiation passed through the resonator without amplification. (e) Near-field distribution of input energy. (f) Injection-controlled layout.

Fig. 2. Time-integrated far-field distribution of laser radiation in injection-controlled GARPUN operation: (a) K8 glass fluorescence under irradiation; (b) angular distribution together with energy fraction in a given angle.

Fig. 3. Top views of a crater in an Al target with the image plane of the microscope adjusted to (a) the target surface, (b) two-thirds of the crater depth, and (c) the bottom of the crater.

Fig. 4. Side view of a crater produced in PMMA by a single laser pulse with I = 2.3 × 10¹² W cm⁻². The image was obtained in polarized light.

Fig. 5. Distribution of a discharge-pumped KrF laser radiation in the focal spot.

Fig. 6. Channels drilled by a train of 2 mJ, 20 ns KrF laser pulses in (a) PMMA at a repetition rate of 10 Hz and (b) K8 glass at 40 Hz, with irradiation times of ∼100 s and ∼300 s, respectively.

Fig. 7. Input parameters for simulations: (a) laser pulse form; (b) target composition.

Fig. 8. Axial positions of the SW front (1) and the AF (2) vs time in (a) 1D and (b) 2D simulations. The dashed line indicates the initial position of the vacuum–target boundary.

Fig. 9. (a) Simulated axial distributions (r = 0) of plasma temperature and density at t = 70 ns. (b) Simulated radial distribution of plasma density at the target–vacuum interface (z = 1) at t = 70 ns.