Fig. 1. Choosing slow-axis linearly polarized laser output by coiling fiber^[48]

Fig. 2. Realizing linearly polarized laser output by orthogonal splicing^[49]

Fig. 3. Calculated bending loss curves relative to polarization^[51]

Fig. 4. Polarization choosing of super large mode area PM fiber by coiling^[53]

Fig. 5. Comparison of output PER under 3 kW and 5 kW for two pumping schemes^[54]. (a) 3 kW; (b) 5 kW

Fig. 6. Realizing linearly polarized fiber laser output by active polarization control method^[8]

Fig. 7. Realizing single frequency linearly polarized fiber laser output by combining PBS and single mode fiber^[55]

Fig. 8. Effective refractive index and birefringence of all the PM fiber modes^[58]. (a) Effective refractive index; (b) birefringence

Fig. 9. Specialty polarization maintaining photonic crystal fiber^[59]

Fig. 10. Asymmetric core polarization maintaining fiber^[60]

Fig. 11. Sinusoidal signal phase modulation^[62]

Fig. 12. Linearly polarized fiber oscillator with 2 m cavity length^[12]

Fig. 13. Single mode-multi mode-single mode oscillator construction^[9]

Fig. 14. 3.96 kW bidirectional pumping configuration^[20]

Fig. 15. Schematic of AM and FM combined injection^[68]

Fig. 16. 3.25 kW spectrum evolution without SBS and self-pulsing^[19]

Fig. 17. Self-pulsing suppressed single frequency seed by two stage phase modulation^[17]

Fig. 18. SBS suppression by using tapered polarization-maintaining fiber in amplifiers^[16]

Fig. 19. Investigation of impact on SRS under different seed time domain stability^[77]

Fig. 20. Mode selection by coiling fiber in the main amplifier stage^[10]

Fig. 21. TMI threshold test results under forward and backward pumping^[20]

Fig. 22. 915 nm LD pumped linearly polarized fiber laser with high power seed injection^[67]

Fig. 23. TMI suppression by pumping modulation^[89]