高功率激光器的光谱合束技术研究

穆让修, 张佳, 龙井宇, 李刚, 卜英华, 韩耀锋, 寿少峻

穆让修, 张佳, 龙井宇, 李刚, 卜英华, 韩耀锋, 寿少峻. 高功率激光器的光谱合束技术研究[J]. 应用光学, 2022, 43(4): 792-797. DOI: 10.5768/JAO202243.0407001
引用本文: 穆让修, 张佳, 龙井宇, 李刚, 卜英华, 韩耀锋, 寿少峻. 高功率激光器的光谱合束技术研究[J]. 应用光学, 2022, 43(4): 792-797. DOI: 10.5768/JAO202243.0407001
MU Rangxiu, ZHANG Jia, LONG Jingyu, LI Gang, BU Yinghua, HAN Yaofeng, SHOU Shaojun. Spectral beam combination technology of high-power laser[J]. Journal of Applied Optics, 2022, 43(4): 792-797. DOI: 10.5768/JAO202243.0407001
Citation: MU Rangxiu, ZHANG Jia, LONG Jingyu, LI Gang, BU Yinghua, HAN Yaofeng, SHOU Shaojun. Spectral beam combination technology of high-power laser[J]. Journal of Applied Optics, 2022, 43(4): 792-797. DOI: 10.5768/JAO202243.0407001

高功率激光器的光谱合束技术研究

基金项目: “十三五”装备预研兵器工业联合基金
详细信息
    作者简介:

    穆让修(1987—),男,硕士,工程师,主要从事光电对抗方面的研究。E-mail:xiuzimu@163.com

  • 中图分类号: TN249

Spectral beam combination technology of high-power laser

  • 摘要:

    为了获得高功率激光束,提出利用双色镜对典型波长2种不同类型(脉冲、连续)的高能激光进行合束,以实现高功率高能量激光输出。通过对双色镜的热效应和合束光斑远场激光参数进行仿真分析计算,热效应仿真结果表明,在单束激光10 kW、光斑直径15 mm条件下,双色镜面型热形变量均方根值为0.004λλ=632.8 nm),满足光学元件面型小于0.03λ精度要求。搭建了一套基于双色镜的光谱合束系统,并分别进行了高功率连续激光与高功率连续激光、高功率连续激光与高能量脉冲激光的合束试验,合束效率高于95%。试验结果表明,光谱合束可有效应用于高能激光领域。

    Abstract:

    In order to obtain the high-power laser beam, the dichroic mirror was used to combine the two different types of pulse and continuous high energy laser beam of typical wavelengths to achieve the high-power and high-energy laser output. Through the simulation analysis of the thermal effect of dichroic mirrors and the far-field laser parameters of beam combination spot, the simulation results of the thermal effect showed that the root-mean-square value of surface thermal deformation of dichroic mirror was 0.004 λ (λ=632.8 nm) with the single laser beam power of 10 kW and the light spot diameter of 15 mm, which satisfied the design requirements of optical elements surface accuracy less than 0.03 λ. Finally, an experimental system based on dichroic mirror of spectral beam combination was developed. The beam combination test of high-power continuous laser and high-power continuous laser, high-power continuous laser and high-energy pulsed laser were carried out respectively, and the beam combination efficiency was higher than 95%. The experimental results show that the spectral beam combination can be effectively applied to the field of high-energy laser.

  • 图  1   双色镜合束原理示意图

    Figure  1.   Schematic diagram of dichroic mirror beam combination

    图  2   光机热分析流程

    Figure  2.   Flow chart of optical and mechanical thermal analysis

    图  3   镜片温度分布图

    Figure  3.   Diagram of mirror temperature distribution

    图  4   热变形后的点列斑

    Figure  4.   Spot array values after thermal deformation

    图  5   合束激光在远场的激光光斑示意图

    Figure  5.   Schematic diagram of laser spot of beam combination laser in far field

    图  6   1090 nm透过率测试曲线

    Figure  6.   Testing curve of 1 090 nm transmittance

    表  1   二氧化硅的热力学参数

    Table  1   Thermodynamic parameters of SiO2

    材料特性参数
    密度/ kg·m−32 200
    吸收系数/ m−1141
    热导率/ W·m−1·K−11.4
    比热容/ J·kg−1·K−1752
    热膨胀系数/ K−15.8×10−7
    杨氏模量/ GPa73.1
    泊松比0.17
    熔点/ K1 750
    拉应力/ MPa500
    压应力/ MPa3 000
    下载: 导出CSV

    表  2   双色镜热分析形变量仿真结果

    Table  2   Simulation results of thermal analysis and deformations of dichroic mirror

    单束激光功率/ W最高温度/(°)最低温度/(°)元件形变量RMS/m
    50020.89820.3081.5×10−10
    10 00038.73426.8672.9×10−9
    下载: 导出CSV

    表  3   合束激光远场光斑参数仿真计算结果

    Table  3   Simulation results of laser spot parameters of beam combination laser in far field

    距离L/m3005001 0003 000
    $ {d_c} $/mm$ \delta $=054.791.7183.4550.0
    $ \delta $=10 μrad55.392.1186.0557.2
    $ {\theta _c} $/mrad$ \delta $=00.1830.1830.1830.183
    $ \delta $=10 μrad0.1840.1840.1840.184
    下载: 导出CSV

    表  4   连续1 070 nm、1 090 nm激光合束效率试验测试结果

    Table  4   Test results of beam combination efficiency between 1 070 nm and 1 090 nm continuous laser

    序号1 070 nm激
    光功率/W
    1 090 nm激
    光功率/W
    合束后
    功率/W
    合束效率/%
    1499.8501.1954.895.4
    2499.8501.1952.695.2
    3499.8501.1956.195.6
    下载: 导出CSV

    表  5   脉冲1 064 nm、连续1 090 nm激光合束效率试验测试结果

    Table  5   Test results of beam combination efficiency between 1 064 nm pulse laser and 1 090 nm continuous laser

    序号合束前合束后合束效率/%
    1 064 nm
    脉冲能
    量/mJ
    1 090 nm
    连续功
    率/W
    1 064 nm
    脉冲能
    量/mJ
    1 090 nm
    连续功
    率/W
    1 064 nm
    脉冲
    1 090 nm
    连续
    1400.2500.6389.6474.697.394.8
    2400.2500.6387.4476.896.895.2
    3400.2500.6390.1475.297.594.9
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-05-15
  • 修回日期:  2022-06-03
  • 网络出版日期:  2022-06-08
  • 刊出日期:  2022-07-14

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