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High-power LG laser generation based on a side-pumped Nd:YAG module cavity.

Jiaqi Shi, Bowen Lv, Guangye Wu

|March 17, 2026

Summary

Researchers generated high-power laser beams in specific light patterns (LG modes) using a side-pumped Nd:YAG laser. This advancement enables tunable, high-order laser modes for potential applications in structural optics.

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Area of Science:

Optics and Photonics
Laser Physics

Background:

High-power laser generation is crucial for various scientific and industrial applications.
Controlling laser beam spatial modes, such as Laguerre-Gaussian (LG) modes, allows for tailored beam properties.

Purpose of the Study:

To investigate the generation of high-power, high-order Laguerre-Gaussian (LG) modes.
To explore the advantages of a side-pumped configuration for efficient LG mode operation.

Main Methods:

Utilized a side-pumped Neodymium-doped Yttrium Aluminum Garnet (Nd:YAG) laser module.
Optimized cavity parameters, including spherical aberration, for stable high-order LG mode output.
Adjusted cavity parameters and alignment to achieve tunable LG modes.

Main Results:

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Achieved stable high-order LG mode output with 10 W level power.
Obtained tunable LG modes with angular indices (m) ranging from ±6 to ±65.
Observed output laser power varying from 30.03 W to 17.86 W with increasing angular indices at 17 A pump current.

Conclusions:

The side-pumped configuration is advantageous for efficient high-order LG mode generation.
The developed system provides tunable, high-power LG laser modes.
The high-power LG laser output has potential applications in structural optics.