In recent years, ceramics materials have attracted much attention as laser gain media. Compared with single crystal laser materials, ceramics have the advantage of short fabrication period, potential low cost, large size and high doping concentration available. We have experimentally studied two types of ceramic lasers: self-mode-locked Yb:Y2O3 ceramic laser and SESAM mode-locked Nd:YAG ceramic laser. The experimental results show that Yb:Y2O3 and Nd:YAG ceramics are excellent laser media for high-average-power mode-locked lasers.