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2-μm MOPA结构全光纤激光器输出特性研究

吴玲 娄岩 侯欣宜 李保群 李永亮 王天枢 赵义武

吴玲, 娄岩, 侯欣宜, 李保群, 李永亮, 王天枢, 赵义武. 2-μm MOPA结构全光纤激光器输出特性研究[J]. 中国光学(中英文), 2023, 16(2): 399-406. doi: 10.37188/CO.2022-0191
引用本文: 吴玲, 娄岩, 侯欣宜, 李保群, 李永亮, 王天枢, 赵义武. 2-μm MOPA结构全光纤激光器输出特性研究[J]. 中国光学(中英文), 2023, 16(2): 399-406. doi: 10.37188/CO.2022-0191
WU Ling, LOU Yan, HOU Xin-yi, LI Bao-qun, LI Yong-liang, WANG Tian-shu, ZHAO Yi-wu. Output characteristics of an all-fiber laser with a 2-μm MOPA structure[J]. Chinese Optics, 2023, 16(2): 399-406. doi: 10.37188/CO.2022-0191
Citation: WU Ling, LOU Yan, HOU Xin-yi, LI Bao-qun, LI Yong-liang, WANG Tian-shu, ZHAO Yi-wu. Output characteristics of an all-fiber laser with a 2-μm MOPA structure[J]. Chinese Optics, 2023, 16(2): 399-406. doi: 10.37188/CO.2022-0191

2-μm MOPA结构全光纤激光器输出特性研究

doi: 10.37188/CO.2022-0191
基金项目: 国家自然科学基金项目(No. 61975021);吉林省科技发展计划项目(No. 20220402014GH,No. 20200201185JC)
详细信息
    作者简介:

    吴 玲(1998—),女,河南南阳人,硕士研究生,2020年于河南师范大学获得学士学位,主要从事光纤激光器技术及其应用的研究。E-mail:2020100215@mails.cust.edu.cn

    娄 岩(1981—),女,吉林长春人,博士,副研究员,硕士生导师,2012年于长春理工大学获得博士学位,主要从事空间激光通信、激光应用等方面的研究。E-mail: lyan@cust.edu.cn

  • 中图分类号: TN248

Output characteristics of an all-fiber laser with a 2-μm MOPA structure

Funds: Supported by National Natural Science Foundation of China (No. 61975021); Science and Technology Development Program of Jilin Province (No. 20220402014GH, No. 20200201185JC)
More Information
  • 摘要:

    为改善高功率掺铥光纤激光器(TDFL)的输出性能,提高系统的光-光转化效率,研制了一种全光纤主振荡功率放大结构(MOPA)的高功率TDFL,可在连续(CW)和准连续(QCW)两种模式下工作。首先,搭建了激光振荡器,对种子源激光器的输出特性进行研究。接着,搭建掺铥光纤放大器,并将其与激光振荡器连接,研究MOPA结构光纤激光器的输出特性。最后,在QCW调制模式下,分析MOPA结构光纤激光器的脉冲特性。结果表明:激光振荡器实现了中心波长为1940 nm连续稳定的激光输出,最高平均输出功率为18.56 W,斜率效率为54.84%,且光谱无拉曼成分。利用该低功率连续激光作为种子源经过自制的掺铥光纤放大器后,平均输出功率可达66.9 W,斜率效率为48.48%。当系统在QCW模式下工作时,可以实现对频率和占空比的调节,且当频率为75 Hz,占空比为10%时,经计算其峰值功率为80.3 W。该研究方案对研制2 μm波段更高功率的MOPA激光器具有参考意义。

     

  • 图 1  2-μm高功率激光器示意图 。LD:激光二极管; CPS:包层功率剥离器;EFC:光纤激光输出头

    Figure 1.  Schematic diagram of 2-μm high power fiber laser. LD: laser diode; CPS: cladding power stripper; EFC: endcaped fiber cable

    图 2  2-μm高功率激光器种子源和放大级实物图

    Figure 2.  Physical diagrams of the seed source and amplification stage of the 2-μm high-power laser

    图 3  种子激光器光谱图

    Figure 3.  Spectrogram of the seed laser

    图 4  种子激光器输出特性图

    Figure 4.  Output characteristics of seed laser

    图 5  MOPA激光器在不同输出功率时的光谱

    Figure 5.  Spectram of MOPA laser at different output powers

    图 6  优化前后MOPA激光器输出特性图

    Figure 6.  Output characteristics of MOPA laser before and after optimization

    图 7  放大级开4个泵后,MOPA激光器的输出功率和转化效率随泵浦功率的变化

    Figure 7.  Output power and conversion efficiency of the MOPA laser versus the pump power after turning on 4 pumps in the amplified stage

    图 8  不同调制频率下,激光输出功率和占空比的关系

    Figure 8.  Laser output power versus the duty cycle under different modulation frequencies

    图 9  重复频率为50 Hz,脉冲宽度为1 ms的脉冲

    Figure 9.  Pulses with 50 Hz repetition rate and 1 ms pulse width

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  • 收稿日期:  2022-09-01
  • 修回日期:  2022-09-28
  • 录用日期:  2022-11-25
  • 网络出版日期:  2022-12-24

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