Fig. 1. A concept of the random distributed feedback fiber laser^[5]

Fig. 2. Randomly distributed feedback fiber laser configurations^[5]

Fig. 3. Methods for solving the systems of differential equations of the Raman random fiber laser^[14]

Fig. 4. Lasing spectral characteristics of randomly distributed feedback fiber laser based on NLSE^[11]

Fig. 5. Temporal and statistical characteristics of randomly distributed feedback fiber laser based on NLSE^[11]

Fig. 6. Output intensity characteristics of randomly distributed feedback fiber laser^[35]

Fig. 7. Output temporal characteristics and statistical features of random fiber laser^[36]

Fig. 8. Temporal intensity dynamics and PDF of filtered random lasing radiations at different spectral locations^[38]

Fig. 9. Temporal signals and corresponding spectral densities of the RFL at maximal pump power^[39]

Fig. 10. Normalized oscilloscope traces of the RRFL output by different pump^[40]

Fig. 11. Effect of bandwidth of ASE pump on random fiber laser^[42]

Fig. 12. Characteristics of 1090 nm YRFL pump^[43]

Fig. 13. Comparison between 1365 nm RFL pumped by 1090 YRFL and commercial 1365 nm fiber laser^[43]

Fig. 14. Spectrum evolution of random fiber laser based on Rayleigh scattering^[13]

Fig. 15. Temporal dynamics of the generation spectra of the measured random fiber laser (the letters in (a) and (b) mark the same spectral lines)^[46]

Fig. 16. Real-time spectro-temporal evolution in the random fiber laser^[47]

Fig. 17. Spectral correlations in the random fiber laser^[47]

Fig. 18. Statistical analysis of the intensity spectra and PDF P(I) of maximum intensities I with different pump power (erbium-doped RFL)^[49]

Fig. 19. Statistical analysis of the temporal intensity and PDF P(I) of maximum intensities Iwith different pump power (Raman RFL)^[52]

Fig. 20. Optical images of the speckle pattern and the logo mask with different illumination sources^[57]

Fig. 21. Speckle formed after passing through a ground glass diffuser^[59]

Fig. 22. Schematic diagram of high power low spatial coherence random fiber laser based on MOPA configuration^[60]