Fig. 1. Spectral evolution under different peak pump powers without Raman response. (a) P₀=0.1 MW; (b) P₀=1 MW; (c) P₀=4 MW; (d) P₀=8 MW

Fig. 2. Spectral evolution under different peak pump powers with fR=0.18. (a) P₀=0.1 MW; (b) P₀=1 MW; (c) P₀=4 MW; (d) P₀=8 MW

Fig. 3. Spectral evolution with and without Raman effect when P₀=8 MW

Fig. 4. Schematic diagram of experimental setup for femtosecond pulse pumping of Ba(NO₃)₂ crystal

Fig. 5. Output beam spots when input power is 50 mW. (a) Initial operation; (b) long-term operation

Fig. 6. Experimental and simulated spectra at different peak pump powers. (a) P₀=5 MW; (b) P₀=7.6 MW

Fig. 7. Simulated and experimental spectra with different Raman response function contributions