Fig. 1. Sum-frequency conversion efficiency changed with frequency doubling light intensity

Fig. 2. Schematic of experimental setup for kilohertz multiwavelength laser

Fig. 3. Phase matching of frequency doubling (type Ⅰ) and sum-frequency (type Ⅱ) beams in LBO crystal

Fig. 4. Comparison of static output and dynamic output of 1064 nm basic-frequency light

Fig. 5. 532 nm single pulse energy changed with 1064 nm peak power density

Fig. 6. 355 nm single pulse energy changed with frequency doubling conversion efficiency

Fig. 7. Relationship between single pulse energy of three-wavelength laser and pump power

Fig. 8. Laser pulse shape of three wavelengths. (a) 1064 nm; (b) 532 nm; (c) 355 nm

Fig. 9. Laser far-field spots of three wavelengths. (a) 1064 nm; (b) 532 nm; (c) 355 nm

Fig. 10. Laser power stability curves of three wavelengths. (a) 1064 nm; (b) 532 nm; (c) 355 nm