LD泵浦、1W输出的Nd：GdVO4半导体可饱和吸收镜连续锁模激光器

LD-pumped 1W Output Nd:GdVO_4 SESAM Mode-locked Laser

报道了激光二极管泵浦、采用半导体可饱和吸收镜(SESAM)实现的Nd:GdVO4连续被动锁模运转激光器,得到了较大功率输出(接近1 W)的连续锁模激光。设计了四镜Z型折叠激光谐振腔,在不同曲率半径的腔镜及不同的腔长条件下,分别获得了重复频率为250 MH z和100 MH z的稳定连续锁模脉冲输出。采用透过率1%的输出耦合镜,在泵浦功率为6.9 W时,得到连续锁模激光输出功率970 mW,光-光转换率达到13.7%。理论上讨论了调Q锁模的抑制措施,并结合实验结果进行了分析,得到了1063 nm稳定连续锁模激光输出,锁模脉冲光谱宽度1.2 nm(FWHM),用自相关仪测得脉宽为15.1 ps。

A diode end-pumped passively mode-locked Nd： GdVO4 laser with semiconductor saturable absorber mirror （SESAM） is presented and comparatively high power output （ nearly 1 W） is obtained. Stable continuous mode-locked pulses are obtained with a Z-shaped resonator and the pulse repetition rates are 250 MHz and 100 MHz with two different cavities. With 1% transmission output coupler, average output power of 970mW is obtained with the incident pump power of 6. 9W. The optical-optical conversion efficiency is 13.7%. The Q-switched mode-locked pulse （QML） is studied in theory and experiment. The mode-locked pulse width （FWHM） at 1063nm is 15.1 ps measured by autocorrelator.