利用半导体可饱和吸收镜(SESAM)锁模技术实现的超快脉冲激光器具有结构简单紧凑、脉冲序列稳定等优势,在许多领域有着重要用途,自问世以来受到国内外的广泛关注。分析了SESAM被动锁模侧面抽运固体激光器的具体要求,进行了不同条件下的SESAM被动锁模侧面抽运Nd:YAG激光器实验。获得了最高平均功率9.5 W,脉冲重复频率71 MHz,单脉冲能量约141 nJ的皮秒激光脉冲。对SESAM被动锁模侧面抽运Nd:YAG激光器进行了实验和理论分析,对实现高功率连续超短脉冲激光器进行了探讨。

Recently,semiconductor saturable absorbers mirror (SESAM) have become the important components in the compact mode-locking solid-state lasers.We designed a side-pumped folded cavity Nd:YAG solid laser mode-locking with SESAM and get the highest average output power about 9.45 W.The single pulse has about 141 nJ energy and 71 MHz repetitionrate.With exactly measurement about the thermal focal length,special cavity can be designed to control the mode radius.Although the laser was pumped by high power laser diode (LD) (over hundreds watts),but it still has very well beam quality (nearly the diffraction-limited beam).From this work ,it get closer towards the high power mode-locked solid laser.