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Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

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Published on: April 24, 2014

13 J direct-liquid-cooled solid-state disk laser with an unstable cavity.

Zhibin Ye, Jile Huge, Xiaolei Deng

|May 14, 2020

Summary

This study demonstrates a 13 J direct-liquid-cooled solid-state disk laser using an unstable cavity, achieving high single-pulse energy output and efficiency. The laser system offers significant potential for high-energy pulsed laser applications.

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Area of Science:

Lasers and Photonics
Solid-State Laser Technology
Optical Engineering

Background:

High-energy pulsed lasers are crucial for various scientific and industrial applications.
Developing efficient and scalable solid-state laser systems remains a key research area.
Unstable cavities offer advantages for high-energy extraction in laser resonators.

Purpose of the Study:

To develop and demonstrate a high-energy direct-liquid-cooled solid-state disk laser.
To investigate the performance of an unstable resonant cavity for high-energy laser output.
To optimize laser parameters for maximum single-pulse energy and efficiency.

Main Methods:

Design and construction of a direct-liquid-cooled solid-state disk laser system.

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Analysis of resonant cavity output energy based on gain levels in a stable cavity configuration.

Implementation of an unstable cavity with a concave-convex mirror for magnification.

Experimental testing at a repetition frequency of 100 Hz and pulse width of 350 µs.

Main Results:

A single-pulse energy output of 13.2 J was achieved with the unstable cavity laser.
The laser system demonstrated an optical-optical efficiency of 22% and a slope efficiency of 27.6%.
A magnification of 1.3 was attained in the unstable cavity at the optimum gain level.
Beam quality factors were measured as βx = 4.7 and βy = 16.6.

Conclusions:

The developed 13 J direct-liquid-cooled solid-state disk laser with an unstable cavity is a viable high-energy pulsed laser source.
The unstable cavity design effectively enhances energy extraction, achieving significant single-pulse energy output.
The demonstrated efficiencies and beam quality metrics indicate the system's potential for advanced laser applications.