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

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:

• 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.