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孙堂正, 李云飞, 谭晶荣, 杜晓娟, 丁嘉宇, 任舒婷, 许浩, 王翀, 杨金芳, 张明霞, 朱永乐, 董忠, 令维军. 同带泵浦的Tm:CYA调Q锁模激光器[J]. 中国光学(中英文). doi: 10.37188/CO.2023-0162
引用本文: 孙堂正, 李云飞, 谭晶荣, 杜晓娟, 丁嘉宇, 任舒婷, 许浩, 王翀, 杨金芳, 张明霞, 朱永乐, 董忠, 令维军. 同带泵浦的Tm:CYA调Q锁模激光器[J]. 中国光学(中英文). doi: 10.37188/CO.2023-0162
SUN Tangzheng, LI Yunfei, TAN Jingrong, DU Xiaojuan, DING Jiayu, REN Shuting, XU Hao, WANG Chong, YANG Jinfang, ZHANG Mingxia, ZHU Yongle, DONG Zhong, LING Weijun. Tandem pumped Q-switched mode-locked laser operation of Tm:CYA laser[J]. Chinese Optics. doi: 10.37188/CO.2023-0162
Citation: SUN Tangzheng, LI Yunfei, TAN Jingrong, DU Xiaojuan, DING Jiayu, REN Shuting, XU Hao, WANG Chong, YANG Jinfang, ZHANG Mingxia, ZHU Yongle, DONG Zhong, LING Weijun. Tandem pumped Q-switched mode-locked laser operation of Tm:CYA laser[J]. Chinese Optics. doi: 10.37188/CO.2023-0162

同带泵浦的Tm:CYA调Q锁模激光器

doi: 10.37188/CO.2023-0162
基金项目: 国家自然科学基金(No. 62165012);甘肃省重点研发计划(No. 21YFIGE300);甘肃省高等学校产业支撑引导项目(No. 2020C-23);甘肃省教育厅:教育揭榜挂帅项目(No. 2021jyjbgs-06);甘肃省高等学校创新基金项目(No. 2021B-190);秦州区科技计划(No. 2021-SHFZG-1442);2023年甘肃省高校青年博士支持项目(No. 2023QB-013);天水师范学院2022 年科研创新平台建设专项(No. PTJ2022-06);天水师范学院研究生创新引导项目(No. TYCX2235);甘肃省优秀研究生创新之星项目(No. 2022CXZX-796)、研究生创新之星项目(No. 2023CXZX-792)
详细信息
    作者简介:

    孙堂正(1999—),男,江苏淮安人,硕士研究生,2021年于江苏第二师范学院取得学士学位,主要从事超快激光技术方面的研究。E-mail:210700788@qq.com

  • 中图分类号: TN248.1

Tandem pumped Q-switched mode-locked laser operation of Tm:CYA laser

Funds: Supported by National Natural Science Foundation of China (No. 62165012); Key R&D Program of Gansu Province (No. 21YFIGE300); Gansu Provincial Higher Education Industry Support and Guidance Project (No. 2020C-23); Gansu Provincial Department of Education: Education Unveiling and Leading Project (No. 2021jyjbgs-06); Gansu Provincial Higher Education Innovation Fund Project (No. 2021B-190); Qinzhou District Science and Technology Plan (No. 2021-SHFZG-1442); 2023 Gansu Provincial University Young Doctoral Support Project (No. 2023QB-013); Tianshui Normal University 2022 special project for the construction of scientific research and innovation platform (No. PTJ2022-06); Tianshui Normal University Graduate Innovation Guidance Project (No. TYCX2235); Gansu Province Outstanding Graduate Innovation Star Program (No. 2022CXZX-796)、 Graduate Innovation Star Program (No. 2023CXZX-792).
More Information
  • 摘要:

    以半导体可饱和吸收镜SESAM作为锁模启动元件,利用同带泵浦技术首次在Tm:CaYALO4(Tm:CYA)激光器实现了被动调Q锁模运转。光路采用X型四镜腔结构,泵浦源采用Er:Y3Al5O12(Er:YAG)固体激光器,其中心波长为1650 nm。分别采用0.5%、1.5%、3%和5%透过率的输出耦合镜,对激光器连续光输出和锁模输出特性进行研究,实验结果表明,当采用5%透过率的输出耦合镜时,激光器的输出特性最好。当激光器在连续光运转情况下,得到了894 mW的最高功率和16%的最大斜效率输出。将连续光功率优化至最高,在光路中加入SESAM锁模元件后,当吸收泵浦功率大于1.86 W时,激光运转进入不稳定的调Q状态;当吸收泵浦功率提高到5.7 W时,实现了稳定的被动调Q锁模运转;吸收泵浦功率达到6.99 W时,采用5%的输出镜,获得了最高输出功率为399 mW的锁模脉冲激光。此时调Q包络下重复频率为98.11 MHz,脉冲宽度为619.4 ps,对应最大单脉冲能量为4.07 nJ。调Q包络中锁模脉冲调制深度接近100%。实验结果表明,同带泵浦技术可以用于激光器以实现调Q锁模脉冲的产生,为超短脉冲激光的产生提供了一种新的泵浦方式。

     

  • 图 1  实验装置原理图

    Figure 1.  Schematic diagram of the experimental device

    图 2  连续光输出功率随吸收泵浦功率变化图

    Figure 2.  The output power of continuous laser varies with the absorption pump power

    图 3  锁模输出功率随泵浦功率变化图

    Figure 3.  The average output power of the mode-locking laser versus the pump power

    图 4  调Q脉冲重复频率和脉冲宽度与吸收的泵浦功率的变化关系

    Figure 4.  The Q-switched pulse repetition rate and width versus the absorbed pump power

    图 5  连续光和锁模激光光谱图

    Figure 5.  The CW and mode-locked laser spectrogram

    图 6  纳秒和微秒时间刻度下的脉冲锁模序列

    Figure 6.  The Q-switched mode-locked pulse trains in nanosecond and microsecond time scales, respectively

    图 7  锁模脉冲重复频率和脉冲宽度

    Figure 7.  Repetition frequency and width of the mode-locked pulse

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