报道了钒酸钇晶体(YVO4)作为拉曼放大器时的性能。观察到拉曼放大器中的自净化作用对拉曼光光束质量的改善。通过改变抽运脉宽,在3组不同脉宽的抽运条件下,分别进行了拉曼放大实验。实验结果表明抽运脉宽越宽,越有利于拉曼种子光与抽运光之间的延时调节。通过改变拉曼种子光与拉曼抽运光两者的夹角,研究了其对拉曼放大器的影响。结果表明利用四波混频实现的拉曼放大对于角度的变化很敏感。最终分别在不同的入射光夹角情况下获得了正三阶和反三阶拉曼斯托克斯光,并与计算所得的谱线进行了对比。 The performance of yttrium vanadate crystals (YVO4) as Raman amplifiers was reported. The improvement of the Raman beam quality was observed for self-purification in Raman amplifiers. By changing the pumping pulse width, Raman amplification experiments were carried out under three different pumping conditions with different pulse widths. Experimental results show that the wider pumping pulse width, the more conducive to the Raman seed light and pumping light between the delay adjustment. By changing the angle between the Raman seed light and the Raman pumping light, the effect on the Raman amplifier is studied. The results show that Raman amplification using four-wave mixing is very sensitive to the change of angle. Finally, positive and negative third-order Raman Stokes beams were obtained at different angles of incident light and compared with the calculated spectra.