Fig. 1. (a) Photograph and (b) schematic diagram of the red-light MSC. (c) Transmission spectra of the red-light MSC, the inset shows the LP₀₁ and LP₁₁ modes.

Fig. 2. (a) Photograph and (b) schematic diagram of the green-light MSC. (c) Transmission spectra of the green-light MSC, the inset shows the mode patterns of the LP₀₁ and LP₁₁ modes.

Fig. 3. (a) Photograph and (b) schematic diagram of the 635-nm red-light all-fiber vortex laser.

Fig. 4. Optical spectra of the 635-nm red-light laser at different powers.

Fig. 5. Near-field intensity distributions of the LP₁₁ mode in the red-light all-fiber laser. (a) and (b) Intensity patterns of the LP₁₁ mode. (c) and (d) Intensity profiles of donut-shaped patterns. (e) and (f) Counterclockwise and clockwise spiral interferograms.

Fig. 6. The power of the red vortex laser under different pump powers.

Fig. 7. (a) Photograph and (b) schematic diagram of the 550-nm green-light all-fiber vortex laser.

Fig. 8. Optical spectra of the 550-nm green-light laser at different powers.

Fig. 9. Near-field distributions of azimuthally/radially polarized beams in the green-light all-fiber laser. (a) and (f) Donut-shape intensity profiles. (b)–(e) and (g)–(j) Near-field intensity patterns with rotation of a polarizer.

Fig. 10. Near-field intensity distributions of the LP₁₁ mode in the green-light all-fiber laser. (a) and (b) Intensity patterns of the LP₁₁ mode. (c) and (d) Intensity profiles of donut-shaped patterns. (e) and (f) Counterclockwise and clockwise spiral interferograms.

Fig. 11. The power of the green vortex laser under different pump powers.