An efficient acousto-optic Q-switched Yb-doped Gd3AlxGa5−xO12 (GAGG) (x=0.5) laser is demonstrated. Under the absorbed pump power of 7.4W, the maximum average output power of 1.4W is obtained at the pulse repletion rate of 1kHz , with the slope efficiency as high as 32%. The pulse width of 40ns is achieved with the pulse energy and peak power of 1.4mJ and 35kW, respectively. What’ more, the output spectrum shows itself tri-wavelength in either CW or Q-switching mode. To our knowledge, this is the first time for realizing simultaneous tri-wavelength Yb:GAGG laser actively Q-switched operation.
Financed by the National Centre for Research and Development under grant No. SP/I/1/77065/10 by the strategic scientific research and experimental development program:
SYNAT - “Interdisciplinary System for Interactive Scientific and Scientific-Technical Information”.