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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。
Ultrafast pulsed lasers, which are realized by SESAM technology, have the advantages of simple and compact structure and stable pulse sequence. They have important applications in many fields and have been widely concerned both at home and abroad since their publication. The specific requirements of SESAM passively mode-locked side-pumped solid-state lasers are analyzed. Experiments on SESAM passively mode-locked side-pumped Nd:YAG lasers under different conditions are carried out. The picosecond laser pulse with the highest average power of 9.5 W, pulse repetition frequency of 71 MHz and single pulse energy of about 141 nJ was obtained. Experiments and theoretical analyzes of SESAM passively mode-locked side-pumped Nd:YAG laser were carried out, and the realization of high power continuous ultrashort pulse laser was discussed.