摘要
结合特殊设计的低阈值五镜折叠腔,利用垂直生长法自制的双壁碳纳米管,并将其作为可饱和吸收体在Tm,Ho…LLF激光器中实现了连续锁模运转。在连续激光运转下,吸收抽运阈值低至59 mW,光-光转化效率为30.09%。在腔内插入饱和吸收体后,吸收抽运阈值提高至107mW。当吸收抽运功率大于1562mW时,激光运转进入稳定的连续锁模状态,对应锁模脉冲的重复频率为100 MHz,脉冲宽度约为515ps;当吸收抽运功率达到2 W时,最高输出功率为234mW,中心波长为1895nm,对应最大单脉冲能量为2.34nJ。
We combine the specially designed low threshold five-mirror folded cavity,employ the home-made double wall carbon nanotubes(DWCN)as saturable absorber by vertical growth method,and realize continuous mode locking operation in Tm,HoLLF all solid state laser.Absorbed pump threshold is as low as 59 mW under the continuous-wave laser operation,and the light to light conversion efficiency reaches 30.09%.The absorbed pump threshold is increased to 107 mW after DWCN is inserted in the cavity.When the absorbed pump power is higher than 1562 mW,the laser operation gets into a stable continuous mode-locked state,for which the corresponding mode-locked pulse repetition frequency is 100 MHz,and the pulse width is about 515 ps.When absorbed pump power reaches 2 W,the maximum output power is 234 mW,the central wavelength is 1895 nm,and the maximum single pulse energy is 2.34 nJ.
作者
令维军
夏涛
董忠
张明霞
左银艳
李可
路飞平
刘勍
赵小龙
王勇刚
Ling Weijun;Xia Tao;Dong Zhong;Zhang Mingxia;Zuo Yinyan;Li Ke;Lu Feiping;Liu Qin;Zhao Xiaolong;Wang Yonggang(Institute of Laser Technology, Tianshui Normal University, Tianshui, Gansu 741001, China;College of Physics and Information Technology, Shaanxi Normal University, Xi'an, Shaanxi 710062, China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2018年第6期212-217,共6页
Acta Optica Sinica
基金
国家自然科学基金(61465012
61564008
11774257
61461046
61665010
61661046)
国家重点研发计划(2017YFB045200)
关键词
激光器
低阈值谐振腔
双壁碳纳米管
连续锁模
lasers
low threshold resonator
double wall carbon nanotubes
continuous-wave mode locking