Fig. 1. Schematic diagram for mode-locked pulsed Nd:YAG/LBO red laser.M1–M6: 45° high-reflection (HR) coating at 1319 nm; M7-M10: concave mirrors; M11: 45° HR at 1319 nm and anti-reflection (AR) coating at 660 nm; L1, L2: lens; LM1–LM4: laser modules

Fig. 2. Energy level diagram of an Nd:YAG crystal

Fig. 3. The laser pulse waveform (when oscilloscope's bandwidth is adjusted to 20 MHz)

Fig. 4. Schematic for macro-micro pulse waveforms

Fig. 5. Micro pulse profiles of the mode-locked 660 nm laser waveforms

Fig. 6. Beam profile distribution of the 659.592 nm laser

Fig. 7. Spectrum profile and linewidth of red laser (660nm) output pulse

Fig. 8. The long-term stability of laser frequency and linewidth of red laser

Fig. 9. 660 nm output power versus the input power for frequency doubling in LBO crystals

Fig. 10. Power stability of the output laser over 2 hours