In recent years, high-brightness picosecond lasers have been widely used in high-end precision processing, spectroscopy and high harmonic generation. To obtain higher power and excellent beam quality, it is an ideal solution to add a high-gain amplifier to the back end of the high-stability picosecond fiber or solid seed. In this article, a fiber-solid hybrid end-pumped Nd:YVO₄ picosecond laser system with high beam quality is demonstrated. The influence of the self-developed picosecond fiber seed output characteristics on solid amplifiers has been studied in detail, including the energy, repetition rate and spectrum. After two-stage traveling wave amplifiers, the maximum 155 μJ single pulse energy is obtained with 20 kHz repetition rate, and the corresponding peak power reaches 14.9 MW with 10.4 ps pulse duration. Meanwhile, the beam quality factors under the maximum 18.4 W average power are measured to be M _x ² = 1.27 and M _y ² = 1.25, respectively.

近年来，高亮度皮秒激光器在高端精密加工、光谱学和高次谐波产生等领域得到广泛应用。为了获得更高的功率和出色的光束质量，在高稳定性皮秒光纤或固体种子的后端增加一个高增益放大器是一个理想的解决方案。在本文中，展示了具有高光束质量的光纤-固体混合端泵浦 Nd:YVO ₄皮秒激光系统。详细研究了自主研发的皮秒光纤种子输出特性对固体放大器的影响，包括能量、重复率和频谱。经过两级行波放大器后，最大 155 μJ 单脉冲能量以 20 kHz 的重复频率获得，相应的峰值功率达到 14.9 MW，脉冲持续时间为 10.4 ps。同时，在最大 18.4 W 平均功率下测量的光束质量因子分别为M _x ² = 1.27 和M _y ² = 1.25。