A Tm3+:Lu2O3 ceramics laser with the L-shaped cavity in-band pumped by a fiber laser at 1670 nm was studied in CW and passively Q-switched multi-wavelength regimes. The CW laser operated at 2066 nm at the weak pump power and self-tuned to 1966 nm and further to 1940 nm at higher pump power. The maximum power in the CW regime at 1940 nm reached 9.5 W, while the average power of 3.6 W was registered in the Q-switched regime with the pulse repetition rate of 110-170 kHz and the pulse duration of 200-240 ns. The Q-switched operation was obtained using a Cr2+:ZnSe saturable absorber. Pulsed regime started at the shortest wavelength of 1940 nm and self-tuned to the double-wavelength of 1940 nm and 1966 nm at higher pump power.
- 2 μm solid-state lasers ceramics lasers
- Multi-wavelength laser operation
- Passive Q-switch
- Saturable absorber
- 1.03 PHYSICAL SCIENCES AND ASTRONOMY
- 1.03.SY OPTICS
- 1.03.UB PHYSICS, APPLIED