Fig. 1. Structure of the yellow fiber laser

Fig. 2. Output performance the laser. (a) Power and conversion efficiency of 1070 nm laser; (b) total power of Raman laser and power of 1178 nm laser

Fig. 3. Output characteristics of 1178 nm laser at different powers. (a) Fine spectra; (b) 3 dB linewidth

Fig. 4. Output power and frequency doubling efficiency of 589 nm laser

Fig. 5. Power stability of 589 nm laser

Fig. 6. Beam quality of 589 nm laser