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Efficient corner-pumped Yb:YAG/YAG composite slab laser.

Mali Gong1, Fuyuan Lu, Qiang Liu

  • 1Department of Precision Instruments and Mechanology, Center of Photonics and Electronics, State Key Laboratory of Tribology, Tsinghua University, Beijing, China.

Applied Optics
|May 26, 2006
PubMed
Summary

A novel corner-pumped Ytterbium-doped Yttrium Aluminum Garnet (Yb:YAG) composite slab laser achieves high efficiency. This design optimizes pump absorption and thermal management for powerful, continuous-wave output.

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Area of Science:

  • Materials Science
  • Laser Physics
  • Optical Engineering

Background:

  • High-power solid-state lasers are crucial for various scientific and industrial applications.
  • Improving pump absorption efficiency and managing thermal effects in Yb:YAG lasers remains a key challenge.

Purpose of the Study:

  • To present a high-efficiency Yb:YAG/YAG composite slab laser utilizing a corner-pumped scheme.
  • To analyze pump absorption efficiency and thermal lensing effects.
  • To optimize geometric parameters for enhanced laser performance.

Main Methods:

  • Development of a composite slab crystal with thermally bonded Yb:YAG and undoped YAG.
  • Implementation of a corner-pumped scheme, coupling diode laser arrays through chamfers.
  • Analysis of pump absorption efficiency and internal thermal lensing effects on the laser resonator.

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Main Results:

  • A novel analysis method was developed to optimize composite slab geometry for pump absorption.
  • The corner-pumped scheme demonstrated effective pump light coupling and absorption.
  • A continuous-wave output power of 1016 W was achieved with 42.8% slope efficiency and 34.4% optical-to-optical efficiency.

Conclusions:

  • The corner-pumped Yb:YAG/YAG composite slab laser design offers a viable path to high-efficiency, high-power laser operation.
  • Optimized geometric parameters and thermal management are critical for maximizing laser performance.
  • This approach provides a foundation for developing advanced laser systems.