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Improved pump-beam distribution in a diode side-pumped solid-state laser with a highly diffuse, cross-axis beam

N Pavel¹, Y Hirano, S Yamamoto

¹Mitsubishi Electric Corporation, Kamakura, Kanagawa 247-8501, Japan. pavel@ims.ac.jp

|March 14, 2008

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A novel cavity design for diode-pumped solid-state lasers achieves efficient light absorption and uniform beam distribution. This laser system demonstrates high slope efficiency and significant output power for various applications.

Area of Science:

Laser Physics
Optical Engineering

Background:

Diode-side-pumped solid-state lasers are crucial for various applications.
Efficient absorption and homogeneous pumping are key challenges in laser design.

Purpose of the Study:

To design, build, and test a new cavity for diode-pumped solid-state lasers.
To evaluate the performance of the new cavity under different operating conditions.

Main Methods:

A novel laser cavity was designed and constructed.
Performance was tested with varying Nd:YAG media, pump power, and diode wavelengths.
Output characteristics were measured for both multimode and single-transverse-mode operation.

Main Results:

Efficient absorption of pump light and homogeneous beam distribution were achieved.

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Full-multimode quasi-continuous operation yielded a slope efficiency of 40.5%.

Single-transverse-mode operation produced 163 W with an M(2) factor < 1.1 and 31.4% optical-to-optical efficiency.

Conclusions:

The new cavity design effectively enhances laser performance.
The system demonstrates high efficiency and power output suitable for demanding applications.
This design offers a robust solution for diode-side-pumped solid-state lasers.