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基于双壁碳纳米管低阈值1895 nm锁模激光器

Low Threshold 1895 nm Mode-Locked Laser Based on Double Wall Carbon Nanotubes

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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107 mW。当吸收抽运功率大于1562 mW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515 ps;当吸收抽运功率达到2 W时,最高输出功率为234 mW,中心波长为1895 nm,对应最大单脉冲能量为2.34 nJ。

Abstract

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, Ho∶LLF 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.

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中图分类号:TN248.1

DOI:10.3788/aos201838.0614001

所属栏目:激光器与激光光学

基金项目:国家自然科学基金(61465012,61564008,11774257,61461046,61665010,61661046)、国家重点研发计划(2017YFB045200)

收稿日期:2017-12-12

修改稿日期:2018-01-11

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作者单位    点击查看

令维军:天水师范学院激光技术研究所, 甘肃 天水 741001
夏涛:天水师范学院激光技术研究所, 甘肃 天水 741001
董忠:天水师范学院激光技术研究所, 甘肃 天水 741001
张明霞:天水师范学院激光技术研究所, 甘肃 天水 741001
左银艳:天水师范学院激光技术研究所, 甘肃 天水 741001
李可:天水师范学院激光技术研究所, 甘肃 天水 741001
路飞平:天水师范学院激光技术研究所, 甘肃 天水 741001
刘勍:天水师范学院激光技术研究所, 甘肃 天水 741001
赵小龙:天水师范学院激光技术研究所, 甘肃 天水 741001
王勇刚:陕西师范大学物理学与信息技术学院, 陕西 西安 710062

联系人作者:令维军(wjlingts@sina.com)

备注:令维军(1968-),男,博士,教授,硕士生导师,主要从事超快激光技术方面的研究。E-mail: wjlingts@sina.com

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引用该论文

Ling Weijun,Xia Tao,Dong Zhong,Zhang Mingxia,Zuo Yinyan,Li Ke,Lu Feiping,Liu Qin,Zhao Xiaolong,Wang Yonggang. Low Threshold 1895 nm Mode-Locked Laser Based on Double Wall Carbon Nanotubes[J]. Acta Optica Sinica, 2018, 38(6): 0614001

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. 基于双壁碳纳米管低阈值1895 nm锁模激光器[J]. 光学学报, 2018, 38(6): 0614001

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