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Updated: May 23, 2026

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Segment side-pumped Q-switched Nd:YAG laser.

Wei Wang1, Chen Fu, Zhenyue Hu

  • 1State Key Laboratory of Tribology, Center for Photonics and Electronics, Department of Precision Instruments and Mechanology, Tsinghua University, Beijing, China. wang‑wei@mail.tsinghua.edu.cn

Applied Optics
|April 17, 2012
PubMed
Summary

A novel segment side-pumped configuration resolves space conflicts in conduction-cooled lasers. This design enables efficient, liquid-cooling-free laser operation, ideal for compact systems.

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Area of Science:

  • Optics and Photonics
  • Laser Engineering

Background:

  • Conduction-cooled lasers face challenges balancing pump source and heat removal systems.
  • The lateral surface of laser rods is a critical area for both pumping and thermal management.

Purpose of the Study:

  • To address the spatial conflict between pumping and heat removal in side-pumped laser designs.
  • To develop a more efficient and compact laser system architecture.

Main Methods:

  • Implementation of a segment side-pumped configuration with alternating circular laser diode arrays and heat-conducting rod holders.
  • Periodic arrangement of components along the laser rod's length.

Main Results:

  • Achieved 11 Hz operation of a 190 mJ Q-switched laser at 1064 nm.

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  • Demonstrated high optical-optical conversion efficiency of 23.1%.
  • Operated without requiring liquid cooling for the laser rod or diode arrays.

    • Conclusions:

    • The segment side-pumped configuration effectively resolves spatial conflicts in conduction-cooled lasers.
    • This approach offers a viable solution for developing compact and miniature laser systems.
    • Elimination of liquid cooling simplifies system design and reduces operational complexity.