摘要
A high-powered millijoule pulse energy Tm3＋-doped fiber amplifier seeded with a Q-switched operation of Tm （4 at.-%）, Ho （0.4 at.-%）：YVO4 laser is reported. The output characteristics of the amplified laser are studied at the coupled powers of 0.266, 1.24, and 2.65 W. Maximum output power up to 15.7 W is at 10-kHz repetition rate. Nonlinear effects are not observed from the emitting spectrum and the full-width at half-maximum （FWHM） of the pulse duration is reduced from 40.1 to 25.9 ns at 1.57-mJ pulse energy. The beam quality factor Mx2=1.9=t=0.03, M2 = 2.14-0.02 at the output power of 14.5 W is measured using the traveling knife-edge method.
A high-powered millijoule pulse energy Tm3＋-doped fiber amplifier seeded with a Q-switched operation of Tm （4 at.-%）, Ho （0.4 at.-%）：YVO4 laser is reported. The output characteristics of the amplified laser are studied at the coupled powers of 0.266, 1.24, and 2.65 W. Maximum output power up to 15.7 W is at 10-kHz repetition rate. Nonlinear effects are not observed from the emitting spectrum and the full-width at half-maximum （FWHM） of the pulse duration is reduced from 40.1 to 25.9 ns at 1.57-mJ pulse energy. The beam quality factor Mx2=1.9=t=0.03, M2 = 2.14-0.02 at the output power of 14.5 W is measured using the traveling knife-edge method.
