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报道了一种基于914 nm共振泵浦技术的高效主动调Q Nd:YVO_4自拉曼激光器。将处于基态低斯塔克能级粒子直接泵浦到激光上能级,可以减小斯托克斯因子损耗、降低量子亏损,从而实现了高效的1 176 nm拉曼光输出。在共振泵浦条件下,对泵浦吸收对转换效率的影响进行了详细的实验研究。使用两块掺杂浓度不同的Nd:YVO_4晶体,分别获得了1.51 W(1.0-at.%,20℃)和2.11 W(2.0-at.%,20℃)的平均输出功率,对应的光光转换效率分别为28.5%(1.0-at.%)和35.2%(2.0-at.%),相对于吸收泵浦光的转换效率分别为42.7%(1.0-at.%)和39.0%(2.0-at.%)。
A highly efficient active Q - switched Nd: YVO_4 self - Raman laser based on 914 nm resonant pumping is reported. Direct pumping of low-Stark energy particles in the ground state to the upper laser level can reduce the Stokes factor loss and reduce the quantum loss, so that an efficient Raman light output of 1 176 nm can be achieved. The effect of pump absorption on the conversion efficiency under resonant pumping conditions is studied in detail. The average output power of 1.51 W (1.0-at.%, 20 ℃) and 2.11 W (2.0-at.%, 20 ℃) were obtained using two Nd: YVO 4 crystals with different doping concentrations. The conversion efficiencies were 28.5% (1.0-at.%) And 35.2% (2.0-at.%) Respectively, and the conversion efficiencies were 42.7% (1.0-at.%) And 39.0% at.%).