皮秒激光泵浦的亚10fs钛宝石激光器  

Sub-10-fs Ti∶sapphire Oscillator Pumped by Picosecond Laser

作　　者：何会军[1,2] 蒋建旺 程梦尧 宋贾俊 王兆华 方少波[1] 魏志义[1,2] HE Hui-jun;JIANG Jian-wang;CHENG Meng-yao;SONG Jia-jun;WANG Zhao-hua;FANG Shao-bo;WEI Zhi-yi(Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences, Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;School of Physics and Optoelectronic Engineering,Xidian University,Xi′an 710126,China)

机构地区：[1]中国科学院物理研究所北京凝聚态物理国家研究中心,北京100190 [2]中国科学院大学,北京100049 [3]西安电子科技大学物理与光电工程学院,西安710126

出　　处：《光子学报》2018年第9期7-12,共6页Acta Photonica Sinica

基　　金：中国科学院战略性先导科技专项(Nos.XDB16030200;XDB23030203);中国科学院前沿科学重点研究计划(Nos.KJZD-EWL11-03;YZDJ-SSW-JSC006);中国科学院青年创新促进会(No.2018007)资助;国家重点研发计划(No.2017YFC0110301);国家自然科学基金(Nos.11434016;61575219)~~

摘　　要：研制了高稳定Nd∶YVO_4皮秒激光振荡器,并在15 W、808nm激光泵浦下得到6 W的连续锁模皮秒激光输出,光-光效率为40%.对该皮秒激光进行单通放大后得到14 W的基频光输出,倍频后可以得到7 W的532nm皮秒激光,用作钛宝石振荡器的泵浦源.在4.5 W的皮秒532nm激光泵浦下,结合腔外压缩,得到了脉宽为9.4fs、平均功率为150mW的脉冲序列输出.调节钛宝石振荡器的腔长使其与皮秒振荡器的腔长一致时,可实现自触发克尔透镜锁模.实验结果表明皮秒激光泵浦可以有效地触发钛宝石激光器的自动锁模,输出飞秒脉冲序列.A high-power Nd:YVO 4 picosecond laser was developed,and the continuously mode-locking with output power of 6 W was realized under 15 W 808 nm pump power,corresponding to optical-to-optical conversion efficiency of 40%.The picoseond laser was amplified to 14 W by a single segment amplifier stage.After frequency multiplication,7 W picosecond laser was obtained,serving as pump source of Ti∶sapphire oscillator.Being pumped by 4.5 W 532 nm picosecond laser,the pulse trains output with pulse duration compressed to 9.4 fs and average power of 150 mW was obtained.By tuning the cavity length of the Ti:sapphire oscillator to decrease the difference between the two oscillators′cavity length,self-initiating Kerr-lens mode-locking was realized.The result shows that the picosecond laser pumping could trigger the Ti∶sapphire oscillator mode-locking and output femtosecond pulse trains.

关 键 词：超快激光 皮秒激光振荡器 钛宝石飞秒激光器 克尔透镜锁模 

分 类 号：TN248[电子电信—物理电子学]