Fig. 1. Absorption cross section of Tm3+-doped glass

Fig. 2. Schematic of the energy-level transition for Tm3+-doped silica

Fig. 3. Slope efficiency obtained for 793 nm pumped TDF as a function of the Tm3+ doping concentration

Fig. 4. Cross section of the double-clad single-mode TDF

Fig. 5. Cross section and refractive index profile of the triple-clad TDF

Fig. 6. System configuration of high-power TDFL

Fig. 7. Fiber laser output power versus launched pump power

Fig. 8. System configuration of the high-power all-fiberized TDFL

Fig. 9. System configuration of the 227-W high-power all-fiberized TDFL

Fig. 10. System configuration of the high-power all-fiberized TDFL

Fig. 11. (a) Master oscillator and (b) power amplifier of high-power widely tunable TDFL

Fig. 12. System configuration of ultrahigh-efficiency and high-power TDFL

Fig. 13. Fiber laser output power versus launched pump power

Fig. 14. System configuration of high-power, single-frequency, single-polarization TDFL

Fig. 15. (a) Pre-amplifying part and (b) main-amplifier of the high power single-frequency Tm-doped all-fiberized TDFL

Fig. 16. (a) Master-oscillator and (b) power-amplifier of high-power, narrow linewidth, all-fiberized TDFL

Fig. 17. System configuration of high power all-fiberized TDFL

Fig. 18. Output power versus pump power for the two-tone configuration (green-dash) and single-tone (blue) direct amplification of 2130 nm

Fig. 19. Experimental setup of high power narrow spectral bandwidth all-fiberized TDFL

Fig. 20. System configuration of MW-level peak power TDFL

Fig. 21. System configuration of 4 MW peak power CPA system

Fig. 22. Experimental setup of 2 GW peak power CPA system

Fig. 23. Experimental setup of 4 GW peak power pulse compression system

Fig. 24. System configuration of high-power, polarized, all-fiberized picosecond pulsed TDFL

Fig. 25. System configuration of high average power repetition-rate-switchable all-fiberized TDFL

Fig. 26. Seed pulse evolution with pump power at the pump pulse width of 50 ns and repetitionrate of 200 kHz