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重复频率可调窄脉宽228 nm紫外激光器

王金艳 马放 郑磊 田东贺 陈曦 郑权

王金艳, 马放, 郑磊, 田东贺, 陈曦, 郑权. 重复频率可调窄脉宽228 nm紫外激光器[J]. 中国光学(中英文), 2024, 17(1): 100-107. doi: 10.37188/CO.2023-0058
引用本文: 王金艳, 马放, 郑磊, 田东贺, 陈曦, 郑权. 重复频率可调窄脉宽228 nm紫外激光器[J]. 中国光学(中英文), 2024, 17(1): 100-107. doi: 10.37188/CO.2023-0058
WANG Jin-yan, MA Fang, ZHENG Lei, TIAN Dong-he, CHEN Xi, ZHENG Quan. An ultraviolet laser at 228 nm with adjustable repetition rate and narrow pulse width[J]. Chinese Optics, 2024, 17(1): 100-107. doi: 10.37188/CO.2023-0058
Citation: WANG Jin-yan, MA Fang, ZHENG Lei, TIAN Dong-he, CHEN Xi, ZHENG Quan. An ultraviolet laser at 228 nm with adjustable repetition rate and narrow pulse width[J]. Chinese Optics, 2024, 17(1): 100-107. doi: 10.37188/CO.2023-0058

重复频率可调窄脉宽228 nm紫外激光器

doi: 10.37188/CO.2023-0058
基金项目: 吉林省重点研发计划(No. 20220201088GX)
详细信息
    作者简介:

    王金艳(1988—),女,吉林长春人,高级工程师,2013年于长春理工大学获得光学硕士学位,现任职于长春新产业光电技术有限公司,主要从事固体激光器技术与应用方面的研究。 E-mail:wangjy@cnilaser.com

    陈 曦(1985—),女,吉林长春人,高级工程师,2012年于长春理工大学获得光学硕士学位,现任职于长春新产业光电技术有限公司,主要从事固体激光器技术与应用方面的研究 。 E-mail:chenxi@cnilaser.com

  • 中图分类号: TN248.1

An ultraviolet laser at 228 nm with adjustable repetition rate and narrow pulse width

Funds: Supported by key Research and Development Plan of Jilin Province (No. 20220201088GX)
More Information
  • 摘要:

    紫外激光器是研究紫外共振拉曼光谱的重要工具,拉曼信号可以通过共振拉曼效应得到增强,从而降低拉曼测量的探测极限。本文研究了一种输出波长为228 nm的窄脉宽全固态紫外激光器。首先,以Nd:YVO4作为增益介质,采用电光调Q腔倒空技术,实现了纳秒量级914 nm基频光输出。然后,经过偏硼酸锂(LBO)晶体产生二次谐波,最终经偏硼酸钡(BBO)晶体获得四次谐波228 nm紫外激光。在此基础上,进一步研究了不同重复频率时基频光和倍频光功率的变化规律,优化了紫外激光器的输出效率。实验结果表明:当总抽运功率为30 W时,在10 kHz重复频率下,可获得最高平均功率为84 mW的228 nm紫外激光输出。228 nm激光在5~25 kHz重复频率范围内连续可调,脉冲宽度保持在2.8~2.9 ns,能够满足紫外光谱检测技术领域的应用需求。

     

  • 图 1  Nd3+离子跃迁能级图

    Figure 1.  Nd3+ ion transition energy-level diagram

    图 2  914 nm基频光实验装置示意图

    Figure 2.  Experimental setup of 914-nm laser

    图 3  简化谐振腔示意图

    Figure 3.  Schematic diagram of a simplified resonant cavity

    图 4  不同腔长时,晶体内基模半径随抽运功率的变化

    Figure 4.  Fundamental mode radius in crystals varying with pump power when the cavity length is different

    图 5  228-nm激光实验装置示意图

    Figure 5.  Experimental setup of 228-nm laser

    图 6  914 nm激光的平均功率与脉冲能量随脉冲重复频率的变化情况

    Figure 6.  Average output power and pulse energy varying with pulse repetition rate for 914-nm laser

    图 7  457 nm激光的平均功率与脉冲能量随脉冲重复频率的变化情况

    Figure 7.  Average output power and the pulse energy varying with pulse repetition rate for 457-nm laser

    图 8  228 nm光谱图

    Figure 8.  Spectrum of 228-nm laser

    图 9  228 nm激光平均功率与脉宽随脉冲重复频率的变化情况

    Figure 9.  Average output power and pulse width varying with repetition rate of 228-nm laser

    图 10  228 nm激光功率稳定性

    Figure 10.  Power stability of 228-nm laser

    图 11  288 nm输出脉冲序列和脉宽。(a)、(b)分别为10 kHz时的脉冲序列和脉宽;(c)、(d)分别为18 kHz时的脉冲序列和脉宽

    Figure 11.  Pulse sequence and pulse width of 228-nm laser. (a) Pulse sequence and (b) pulse width at 10 kHz; (c) pulse sequence and (d) pulse width at 18 kHz

    图 12  紫外激光光斑强度分布图。(a)二维空间强度分布;(b)三维空间强度分布;(c)水平方向强度分布;(d)竖直方向强度分布

    Figure 12.  Spot intensity distribution diagrams of ultra-violet laser. (a) Two-dimensional spatial intensity distribution; (b) three-dimensional spatial intensity distribution; (c) horizontal intensity distribution; (d) vertical intensity distribution

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出版历程
  • 收稿日期:  2023-03-31
  • 修回日期:  2023-04-19
  • 网络出版日期:  2023-07-13

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