Fig. 1. Schematic of the self-Q-switched Yb:KGW laser.

Fig. 2. Output power in the cw and self-Q-switched state with respect to the pump power.

Fig. 3. Typical spectra for cw and self-Q-switching at pump powers of 5.95, 9.69, and 13.7 W.

Fig. 4. Self-Q-switched pulse trains at a pump power of 7.87 W. (a) Long-term pulse trains. (b) Short-term pulse trains.

Fig. 5. The pulse width as a function of the incident pump power.

Fig. 6. The pulse repetition rate as a function of the incident pump power.

Fig. 7. The pulse repetition rate of the self-Q-switching versus the modulation depth.

Fig. 8. Energy level of the F5/22 and F7/22 manifolds of Yb3+ in KGW.