Figure 13.

Temperature in the main focus (a) and in one of the split foci (b) against irradiation time for the same time-average, and different peak, intensities I₀ at the array elements: I₀ = 2.5 W·cm⁻² in continuous mode (1) and I₀ = 10 W·cm⁻² (2), I₀ = 20 W·cm⁻² (3), I₀ = 30 W·cm⁻² (4) and I₀ = 40 W·cm⁻² (5) in the pulse-periodic regimes. Curves 1–5 were simulated accounting for nonlinear effects, curve 1 was simulated linearly for I₀ = 2.5 W·cm⁻².