Fig. 1. The schematic of experimental green laser based on narrow linewidth fiber laser of IPG photonics

Fig. 2. The schematic of green laser based on non-polarization-maintaining narrow linewidth fiber laser with polarization controller of Coherent

Fig. 3. Schematic of green laser based on narrow linewidth fiber laser of Shanghai Institute of Optics and Fine Mechanics

Fig. 4. Schematic for obtaining green laser and ultraviolet laser based on high power nanosecond pulsed fiber laser of Osaka University

Fig. 5. Frequency doubling beam combining scheme proposed by EKSPLA of Lithuania in European Patent

Fig. 6. Schematic of four fiber lasers beam combining based on incoherent scheme by Center for Physical Sciences and Technology of Lithuania

Fig. 7. Schematic of four fiber lasers beam combining based on coherent scheme by Center for Physical Sciences and Technology of Lithuania

Fig. 8. Relation curves of output green light power and fundamental light power when the thickness of crystal is 40 mm and 60 mm

Fig. 9. Phase matching circle of type II LBO crystal and layout diagram of 18 sub-beams