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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

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14 J/2 Hz Yb3+:YAG diode pumped solid state laser chain.

Thierry Gonçalvès-Novo¹, Daniel Albach, Bernard Vincent

¹LULI, Ecole Polytechnique, CNRS, CEA, UPMC, Palaiseau, France. thierry.novo@polytechnique.edu

|February 8, 2013

Summary

The Lucia laser system, a Diode Pumped Solid State Laser, achieved 14 Joules at 2 Hz using Yb3+ doped YAG disks. Engineering focused on mitigating amplified spontaneous emission and thermal effects for improved performance.

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Area of Science:

Laser physics and engineering
Materials science for solid-state lasers
High-energy laser systems

Background:

The Lucia laser chain utilizes a Diode Pumped Solid State Laser (DPSSL) architecture.
It employs Ytterbium-doped Yttrium Aluminum Garnet (Yb3+:YAG) disks in an active mirror configuration.
Previous designs faced challenges in energy output and thermal management.

Purpose of the Study:

To present the front-end and amplifier stages of the Lucia laser chain.
To detail recent energetic performance achievements.
To highlight critical engineering considerations for thermal mitigation and amplified spontaneous emission (ASE) in the amplifier head.

Main Methods:

Implementation of improved pumping architectures for the Yb3+:YAG disks.

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Development of advanced extraction schemes within the active mirror setup.

Engineering strategies for amplified spontaneous emission (ASE) suppression.

Thermal management solutions integrated into the amplifier head design.

Main Results:

Achieved energetic performances of 14 Joules per shot at a repetition rate of 2 Hz.
Demonstrated successful integration of enhanced pumping and extraction architectures.
Validated the effectiveness of ASE and thermal mitigation techniques.

Conclusions:

The optimized Lucia laser chain demonstrates significant advancements in high-energy DPSSL technology.
Effective engineering of pumping, extraction, ASE, and thermal management is crucial for achieving high performance.
The system shows potential for applications requiring high-energy, high-repetition-rate laser pulses.