采用激光二极管端面抽运的双纵模Nd:YVO4微片激光器作为种子光源，双端面抽运的Nd:YVO4行波放大器作为功率放大器，获得了大频差、高功率双频激光信号输出。分析了放大过程中光谱匹配对双频激光输出特性的影响。结果表明，随种子光入射功率从小到大变化，放大倍率呈起伏减小的趋势；受到放大器增益带宽的限制，放大后双频激光频差小于种子光频差。当种子源和放大器的抽运电流分别为14.5 A和40.0 A时，最终获得了功率为2.38 W，频差为47.7 GHz的双频激光信号输出。

By employing laser diodes end-pumped dual-longitudinal-modes Nd:YVO4 microchip laser as seed source, dual-end-pumped Nd:YVO4 traveling wave amplifier as power amplifier, a dual-frequency laser with larger frequency separation and high power output is obtained. In amplification process, spectral matching effects are analyzed. The results show that, with the increase of the seed light power, the overall magnification shows a decreasing trend, and the detail shows a wavy trend. Due to the limiting of amplifier gain bandwidth, the frequency separation of amplified signal is less than that of the seeds. When the pump currents of microchip and amplifier are 14.5 A and 40.0 A, respectively, the amplified output signal power is 2.38 W and the frequency separation is 47.7 GHz.