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Laser & Optoelectronics Progress, Volume. 55, Issue 11, 111405(2018)

Theoretical Research of "Intensity Sweep" Laser Beam Smoothing Characteristics

Tianran Zheng1,2, Ying Zhang1、*, Yuanchao Geng1, Wanqing Huang1, Lanqin Liu1, Xibo Sun1, Wenyi Wang1, Ping Li1, Rui Zhang1, and Dongxia Hu1
Author Affiliations
  • 1 Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900, China
  • 2 Graduate School of China Academy of Engineering Physics, Beijing 100088, China
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    AbstractGet PDF(in Chinese)
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    Schematic diagram of SSD

    Fig. 1. Schematic diagram of SSD

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    Variation of far-field intensity distribution with time. (a) Nc=0.01; (b) Nc=1; (c) Nc=4

    Fig. 2. Variation of far-field intensity distribution with time. (a) Nc=0.01; (b) Nc=1; (c) Nc=4

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    Variation of far-field intensity distribution with time

    Fig. 3. Variation of far-field intensity distribution with time

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    Figures of modulation function. (a) Sinusoidal wave; (b) triangle wave

    Fig. 4. Figures of modulation function. (a) Sinusoidal wave; (b) triangle wave

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    Distribution of near-field intensity

    Fig. 5. Distribution of near-field intensity

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    Relationship between nonuniformity of focal spot and time for "intensity sweep" beam and SSD

    Fig. 6. Relationship between nonuniformity of focal spot and time for "intensity sweep" beam and SSD

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    Relationship between nonuniformity of focal spot and time with different modulation frequencies. (a) SSD beam; (b) sinusoidal modulation "intensity sweep" beam; (c) triangle wave modulation "intensity sweep" beam

    Fig. 7. Relationship between nonuniformity of focal spot and time with different modulation frequencies. (a) SSD beam; (b) sinusoidal modulation "intensity sweep" beam; (c) triangle wave modulation "intensity sweep" beam

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    Influence of modulation frequency on smoothing performance. (a) Smoothing time of 5 ps; (b) smoothing time of 200 ps

    Fig. 8. Influence of modulation frequency on smoothing performance. (a) Smoothing time of 5 ps; (b) smoothing time of 200 ps

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    Tianran Zheng, Ying Zhang, Yuanchao Geng, Wanqing Huang, Lanqin Liu, Xibo Sun, Wenyi Wang, Ping Li, Rui Zhang, Dongxia Hu. Theoretical Research of "Intensity Sweep" Laser Beam Smoothing Characteristics[J]. Laser & Optoelectronics Progress, 2018, 55(11): 111405

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    Paper Information

    Category: Lasers and Laser Optics

    Received: May. 28, 2018

    Accepted: Jun. 4, 2018

    Published Online: Aug. 14, 2019

    The Author Email: Ying Zhang (zhangying@tsinghua.org.cn)

    DOI:10.3788/LOP55.111405

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology