Abstract

We present the continuous-wave (CW) and passively Q-switched laser operation of disordered Nd:ABC3O7 crystals including Nd:SrLaGa3O7, Nd:SrGdGa3O7, and Nd:BaLaGa3O7. Among the Nd:ABC3O7 group members, Nd:SrLaGa3O7 exhibits superior laser properties. A maximum output power reaches 3.88 W under an absorbed pump power of 29.01 W, which is the highest CW output power using LD as the pump source for Nd:SrLaGa3O7 gain medium. Using a Cr4+:YAG crystal as a saturable absorber, the LD pumped passively Q-switched laser is also realized. With Nd:SrLaGa3O7, the shortest pulse width, the largest pulse energy, and the highest peak power are observed to be 10.6 ns, 60.3 μJ, and 5.3 kW, respectively. In the CW laser operation, wavelength tunings are also reported. The center wavelength of this Nd: SrGdGa3O7 laser shifts from 1062.48 to 1063.91 nm by changing the temperature from 60 °C to 135 °C.

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