Fig. 1. Experimental setup diagram of high power visible supercontinuum generation in a piece of seven-core PCF based on MOPA structure^[28]

Fig. 2. Cross section images of several PCFs. (a) Seven-core PCF^[28]; (b)-(c) cascaded PCFs^[29]; (d)-(f) long-tapered PCFs^[30]

Fig. 3. 40 W visible supercontinuum generation based on GRINMMF^[40]. (a) Experimental setup; (b) spectral evolution with pump power using frequency as x-coordinate; (c) final output spectrum. Insets show near-field beam profiles of total and filtered supercontinuum at wavelengths of 730, 620, 532, and 470 nm, respectively

Fig. 4. 204 W visible supercontinuum generation based on GRINMMF^[40]. (a) Experimental setup; (b) final output spectrum. Insets show near-field beam profiles of total and filtered supercontinuum at wavelengths of 730 nm and 620 nm, respectively

Fig. 5. Direct output of 714 W near-infrared supercontinuum based on fiber amplifier^[45]. (a) Experimental setup; (b) optimal supercontinuum output and (c) supercontinuum output power versus pump power under different fiber lengths of 1, 20, 35, and 50 m

Fig. 6. Supercontinuum generation based on random fiber laser with half-open cavity^[48]. (a) Structure diagram; (b) output spectra evolution with pump power

Fig. 7. 34 W supercontinuum generation based on random fiber laser with half-open cavity^[50]. (a) Structure diagram; (b) output spectrum

Fig. 8. 70 W supercontinuum generation in random fiber laser with two pump wavelengths^[51]. (a) Structure diagram; (b) output spectrum

Fig. 9. 130 W supercontinuum generation in random fiber laser with half-open cavity based on fiber amplifier^[52]. (a) Structure diagram; (b) output spectrum

Fig. 10. 3 kW supercontinuum generation in random fiber laser with full-open cavity^[53]. (a) Structure diagram; (b) output spectral evolution with output power

Fig. 11. Supercontinuum generation in random fiber laser with half-open cavity^[54]. (a) Structure diagram; (b) output spectral evolution with pump power

Fig. 12. Output supercontinuum generated in random fiber laser with half-open cavity based on PCF versus pump power^[56]

Fig. 13. Comparison of supercontinuum generation in random fiber laser with half-open cavity with and without polarization maintaining^[57]

Fig. 14. 289 W supercontinuum generation in random fiber laser with half-open cavity based on fiber end feedback^［58］. (a) Structure diagram; (b) output spectral evolution with output power

Fig. 15. Power combination of near-infrared supercontinuum^[60]. (a) Schematic of combiner; (b) simulated relationship between transmission efficiency and length of taper at different wavelengths

Fig. 16. Relationships between critical taper length and taper ratio at different wavelengths^[62]