Cr^(4+):YAG在对撞脉冲锁模的Nd:YAG激光器中实现被动锁模的研究  

Passive ModeLocking in a CPM Nd∶YAG Laser Using Cr~4+∶YAG

作　　者：王加贤[1] 张文珍[1] 王清月[2] 邢岐荣[2] 邓佩珍[3] 徐军[3] 乔景文[3] 

机构地区：[1]华侨大学应用物理系 [2]天津大学精仪学院超快激光研究室 [3]中国科学院上海光学精密机械研究所

出　　处：《光学学报》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

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 modelocked 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 excitedstate of Cr^4+∶YAG acted by strong laser pulses. Passively modelocked 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.

关 键 词：Cr^(4+):YAG 激发态吸收 饱和光强 被动锁模 

分 类 号：TN248.13[电子电信—物理电子学]