低阈值掺钛蓝宝石激光器实验研究  

Experimental study of femtosecond Ti:sapphire laser with low-threshold pump

作　　者：令维军[1] 魏志义[1] 孙敬华[1] 王兆华[1] 田金荣[1] 贾玉磊[1] 王鹏[1] 韩海年[1] 

机构地区：[1]中国科学院物理研究所光物理重点实验室,北京100080

出　　处：《物理学报》2005年第9期4182-4185,共4页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:60225005;10227401和60490280);国家重点基础研究专项经费(批准号:G1999075202)资助的课题.~~

摘　　要：结合特殊的谐振腔设计和半导体可饱和吸收镜,建成了一台低阈值的自启动掺钛宝石激光器.分别用3%和12%的输出耦合镜,获得了阈值低至390mW和600mW的稳定锁模脉冲输出.采用12%输出耦合镜,在1.2W抽运时,输出平均功率为114mW,对应的典型脉宽为17fs,谱宽为47nm.相对于以往的低阈值克尔透镜锁模激光器,锁模工作的范围区域加宽,减小了操作难度,提高了稳定性.A low-threshold self-starting Kerr-lens mode-locked Ti： sapphire laser was demonstrated by use of a tight focusing cavity design and a semiconductor saturable-absorber mirror （SESAM）. With a 3% and a 12% output couplers, we achieved modelocking thresholds as low as 390 and 600mW, respectively. Stable femtosecond laser pulses with average power of 114mW were generated for pump power at 1.2W, which corresponds to a typical duration of 17fs and bandwidth of 47nm. The pump power range for mode-locking covers from 600 mW to 4.8W at a 12% output coupler, and the mode-locking stability is improved.

关 键 词：低阈值 半导体可饱和吸收镜 克尔透镜锁模 掺钛蓝宝石激光器 锁模激光器 掺钛宝石激光器 脉冲输出 实验 谐振腔设计 600mW 

分 类 号：TN248.1[电子电信—物理电子学] TN248