摘要
在理论上提出了Ｃｒ４＋ＹＡＧ作为可饱和吸收体在ＮｄＹＡＧ激光器中实现被动锁模的可能性，运用速率方程组导出在强激光脉冲作用下Ｃｒ４＋ＹＡＧ激发态吸收的恢复时间和饱和光强。实验上在带有抗共振环结构的接近于介稳腔的脉冲式ＮｄＹＡＧ激光器中用Ｃｒ４＋ＹＡＧ作为可饱和吸收体实现被动锁模运转，得到能量１３．５ｍＪ、平均脉宽１８０ｐｓ的锁模脉冲序列。
The possibility of using Cr^4+∶YAG as saturable absorber to achieve passively modelocked operation in a Nd∶YAG Laser is proposed theoretically. From the rate equations, we derived the resumption time and the saturable light intensity of the excitedstate of Cr^4+∶YAG acted by strong laser pulses. Passively modelocked operation is experimentally realized by using Cr^4+∶YAG as saturable absorber in a pulsed Nd∶YAG laser with a nearly critical stable resonator and an antiresonant ring. The pulse train with energy of 13.5 mJ and pulse duration of 180 ps are obtained.
出处
《光学学报》
EI
CAS
CSCD
北大核心
1998年第8期983-987,共5页
Acta Optica Sinica
基金
国家自然科学基金资助项目
