Fig. 1. Principle circuit of electric discharge HF laser

Fig. 2. Electronic concentration distributions of gain region. (a) z=0.6 cm; (b) x=0.75 cm

Fig. 3. Waveform of discharge and corresponding photograph of volume discharge. (a) Discharge waveform; (b) photograph of volume discharge

Fig. 4. Laser waveform and near field light spot. (a) Laser waveform; (b) near field light spot

Fig. 5. Structural diagram of electric discharge HF laser

Fig. 6. Flow speed distribution in gain region

Fig. 7. Pulse energies under different conditions

Fig. 8. Electro-optical efficiency curve of HF laser under different conditions

Fig. 9. E/popt under different gas pressures

Fig. 10. Curves of pulse energy for HF laser with different repetition rates. (a) f=50 Hz; (b) f=100 Hz; (c) f=120 Hz; (d) f=150 Hz

Fig. 11. Experimental waveforms of 50 pulses for electric discharge HF laser with repetition rate of 150 Hz. (a) Overlaid discharge waveform; (b) pulse sequence waveform