SESAM无损伤运转的大功率高重复频率皮秒激光器  

High-Power and High Repetition-Rate Picosecond Laser with No Damage in SESAM

作　　者：黄玉涛[1,2,3] 王璐璐[1,2] 石朝辉[1,3] 樊仲维[1] 

机构地区：[1]中国科学院光电研究院,北京100094 [2]中国科学院大学,北京100049 [3]北京国科世纪激光技术有限公司,北京100192

出　　处：《中国激光》2015年第8期59-65,共7页Chinese Journal of Lasers

基　　金：国家重大科学仪器设备开发专项(2011YQ120024);北京市科委科技新星计划(xx2012084)

摘　　要：提出一种可实现大功率输出、重复频率为80 MHz的皮秒锁模振荡器,当抽运功率为22.4 W时,可实现功率为5.1 W,频谱信噪比大于60 d B,脉冲宽度为23.7 ps的皮秒脉冲的稳定输出。通过选择合理的半导体可饱和吸收镜(SESAM)参数和合适的腔型,实现SESAM长期无损伤运转并进行500 h的实验验证。采用888 nm激光二极管(LD)端面抽运Nd∶YVO4晶体的两级功率放大系统将皮秒锁模振荡器的功率提升至44 W。放大系统的光-光转换效率大于25%,输出光具有良好的光斑模式,光束质量因子M2<1.5。A high-power picosecond mode-locked Nd∶YVO4laser system with high repetition-rate of 80 MHz is reported. When the pump power is 22.4 W, the oscillator provides the output power of 5.1 W with signal-tonoise ratio more than 60 d B and a pulse duration of 23.7 ps. The semiconductor saturable- absorber mirror（SESAM） of oscillator can work for more than 500 h without any damage by selecting reasonable SESAM parameters and suitable cavity. The power is amplified to 44 W by two stages of power amplifier end-pumped by a continuous- wave 888 nm laser diode（LD）. Optical- optical conversion efficiency of amplified system is more than 25%. The beam quality factor M2 after amplification is less than 1.5.

关 键 词：激光器 皮秒锁模振荡器 半导体可饱和吸收镜 激光放大 888 nm抽运 

分 类 号：TN248.1[电子电信—物理电子学]