Fig. 1. Experimental layout of spectral measurement of HF laser

Fig. 2. Output spectra of HF laser at different charging voltages. (a) 21 kV; (b) 25 kV; (c) 29 kV

Fig. 3. Laser energy ratio in each vibration band at different charging voltages. (a) 21 kV; (b) 25 kV; (c) 29 kV

Fig. 4. Output spectra of HF laser at different total gas pressures. (a) 11 kPa; (b) 14 kPa; (c) 17 kPa

Fig. 5. Output spectrum of HF laser at long-wavelength band