Fig. 1. Structural diagram of electric-discharged non-chain HF chemical laser with 100 Hz repetition rate

Fig. 2. Structural diagram of spark gap switch

Fig. 3. Flow rate distribution in discharge region of laser

Fig. 4. Schematic of unstable cavity and beam pattern. (a) Layout of unstable cavity; (b) near-field spot; (c) far-field spot

Fig. 5. Pulse energy and electric efficiency under different gas pressures. (a) Laser energy; (b) electric efficiency

Fig. 6. Pulse energy curves of HF laser with 100 Hz repetition rate under different voltages.(a) U=29 kV; (b) U=27 kV; (c) U=25 kV

Fig. 7. Overlaid waveforms of HF laser with 100 Hz repetition rate under different voltages.(a) U=29 kV; (b) U=27 kV; (c) U=25 kV