摘要
Broadband mid-infrared （IR） supercontinuum laser is generated in standard single-mode fiber-28 directly pumped by a 2054 nm nanosecond Q-switched Tm,Ho：YVO4 laser. The average output powers of 0.53 W in the -1.95-2.5 μm spectral band and 0.65 W in the -1.97-2.45 #m spectral band are achieved at pulse rate frequencies of 7 and 10 kHz, and the corresponding optic-to-optic conversion efficiencies are 34.6% and 42.4% by considering the coupling efficiency. The output spectra have extremely high flatness in the range 2060-2400 and 2060-2360 nm with negligible intensity variation （〈2%）, respectively. The output pulse shape is not split, and pulse width is reduced from 29 to -15.4 ns. The beam quality factor M^2 is 1.06, measured using traveling knife-edge method, and the laser beam spot is also monitored bv an IR vidicon camera.
Broadband mid-infrared （IR） supercontinuum laser is generated in standard single-mode fiber-28 directly pumped by a 2054 nm nanosecond Q-switched Tm,Ho：YVO4 laser. The average output powers of 0.53 W in the -1.95-2.5 μm spectral band and 0.65 W in the -1.97-2.45 #m spectral band are achieved at pulse rate frequencies of 7 and 10 kHz, and the corresponding optic-to-optic conversion efficiencies are 34.6% and 42.4% by considering the coupling efficiency. The output spectra have extremely high flatness in the range 2060-2400 and 2060-2360 nm with negligible intensity variation （〈2%）, respectively. The output pulse shape is not split, and pulse width is reduced from 29 to -15.4 ns. The beam quality factor M^2 is 1.06, measured using traveling knife-edge method, and the laser beam spot is also monitored bv an IR vidicon camera.
