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Chinese Journal of Lasers, Volume. 52, Issue 18, 1803021(2025)

Gain Field Uniformity in High Repetition Rate Large‑Aperture LD Side‑Pumped Nd∶YAG Module (Invited)

Chengcheng Liu1, Dehua Wu1, Qi Liu1, Sujuan Sun1, Xiaofeng Wei1, Siwei Peng1, Kai Beichao1, Zhen Zhu1, Junjun Du1, Wanggen Sun1,3, Chuanshang Fu1, and Xiangang Xu1,2、*
Author Affiliations
  • 1Shandong Huaguang Optoelectronics Co., Ltd., Jinan 250100, Shandong , China
  • 2State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, Shandong , China
  • 3College of Physics Science and Technology, University of Jinan, Jinan 250022, Shandong
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    AbstractGet PDF(in Chinese)
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    Figures & Tables(12)
    Schematic of the structure of LD side-pumped module

    Fig. 1. Schematic of the structure of LD side-pumped module

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    Simulation results of pump light field distribution in crystals for different LD arrangements

    Fig. 2. Simulation results of pump light field distribution in crystals for different LD arrangements

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    Simulated pump light field distributions in crystal with varying LD-to-crystal-center distances

    Fig. 3. Simulated pump light field distributions in crystal with varying LD-to-crystal-center distances

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    Structure of the annular packaging unit

    Fig. 4. Structure of the annular packaging unit

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    Simulated water flow distribution

    Fig. 5. Simulated water flow distribution

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    Photograph of the side-pumped module prototype. (a) Annular unit; (b) integrated module structure

    Fig. 6. Photograph of the side-pumped module prototype. (a) Annular unit; (b) integrated module structure

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    Wavelength of ring-shaped units at different currents

    Fig. 7. Wavelength of ring-shaped units at different currents

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    Optical path layout for fluorescence distribution testing

    Fig. 8. Optical path layout for fluorescence distribution testing

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    Measured gain distribution across crystal cross-section

    Fig. 9. Measured gain distribution across crystal cross-section

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    Thermal lens focal length of the module at different drive currents

    Fig. 10. Thermal lens focal length of the module at different drive currents

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    Optical path diagram of the MOPA system

    Fig. 11. Optical path diagram of the MOPA system

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    Single-pass gain multiplier versus drive current

    Fig. 12. Single-pass gain multiplier versus drive current

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    Chengcheng Liu, Dehua Wu, Qi Liu, Sujuan Sun, Xiaofeng Wei, Siwei Peng, Kai Beichao, Zhen Zhu, Junjun Du, Wanggen Sun, Chuanshang Fu, Xiangang Xu. Gain Field Uniformity in High Repetition Rate Large‑Aperture LD Side‑Pumped Nd∶YAG Module (Invited)[J]. Chinese Journal of Lasers, 2025, 52(18): 1803021

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    Paper Information

    Category: Materials

    Received: May. 30, 2025

    Accepted: Jul. 14, 2025

    Published Online: Sep. 17, 2025

    The Author Email: Xiangang Xu (zhaohy@wit.edu.cn)

    DOI:10.3788/CJL250913

    CSTR:32183.14.CJL250913

    Topics

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