工业加工用高重频腔倒空锁模皮秒激光器研究  

Research on Industrial Processing Used High Repetition Rate Cavity-Dumping Mode-Locked Picosecond Laser

作　　者：杨超[1] 陈檬[1] 白振旭[1] 伊肖静[1] 李港[1] 

机构地区：[1]北京工业大学激光工程研究院,北京100124

出　　处：《应用激光》2013年第2期204-207,共4页Applied Laser

基　　金：国家自然基金资助项目(项目编号:61144007);北京市教委资助项目(项目编号:KM201010005033)

摘　　要：报道了一台用于工业加工的半导体激光端面泵浦Nd∶YVO4晶体的固体皮秒脉冲激光器。实验采用半导体可饱和吸收体(SESAM)锁模技术,并首次利用普克尔盒双向加压方式进行腔倒空,精确控制电光晶体的加压脉宽,实现了高重频皮秒激光的运转,得到了重复频率从500 kHz到1 MHz可调的激光输出。当重复频率为1 MHz时,获得了中心波长为1 064 nm、脉冲宽度10.4 ps、单脉冲能量为297 nJ的激光输出。该皮秒激光系统结构紧凑、稳定性高,为工业加工及再生放大提供了良好的光源。An industrial processing used fiber end-pumped Nd：YVO4 solid-state picosecond laser was demonstrated. Semiconductor saturable absorption mirror （SESAM） mode-locking technique was adopted, and we introduced intra-cavity BBO electro-optic crystal bidirectional voltage supplied cavity dumping technique, which effectively control the high-voltage pulse width of electro-optic crystal. Tunable high repetition rate from 500 kHz to 1 MHz was achieved. 1 064 nm in center wave length laser was obtained with pulse width of 10.4 ps and 297 nJ in single pulse energy at the repetition rate of 1 MHz. This picosecond laser system has the advantages of compact structure and high stability, providing a good source for industrial processing and regenerative amplifier.

关 键 词：激光技术 固体激光器 半导体可饱和吸收体锁模 腔倒空技术 皮秒脉冲 

分 类 号：O43[机械工程—光学工程]