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Updated: Jun 20, 2026

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

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

Published on: July 12, 2017

Pulse compression in a self-filtering Nd:YAG regenerative amplifier.

C G Durfee Iii, H M Milchberg

|September 29, 2009

Summary

Stable pulse compression was achieved in a Nd:YAG regenerative amplifier by using an intracavity spatial aperture. This method produces spectral broadening and chirp below the self-focusing threshold, enabling significant pulse compression.

Area of Science:

Optics and Photonics
Laser Physics
Nonlinear Optics

Background:

Regenerative amplifiers are crucial for generating high-energy laser pulses.
Pulse compression techniques are essential for achieving ultrashort laser pulses.
Self-focusing can limit laser performance in high-intensity systems.

Purpose of the Study:

To investigate spectral broadening and chirp generation in a Nd:YAG regenerative amplifier.
To achieve stable, synchronous pulse compression below the self-focusing threshold.
To explore the potential for significant pulse compression factors.

Main Methods:

Operating a Neodymium-doped Yttrium Aluminum Garnet (Nd:YAG) regenerative amplifier.
Utilizing an intracavity spatial aperture to control beam characteristics.

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Measuring spectral broadening and chirp induced by intracavity intensity.

Main Results:

Spectral broadening and chirp sufficient for pulse compression were observed.
These effects occurred at intracavity intensities well below the self-focusing threshold.
Stable, synchronous pulse compression by a factor of 4 was achieved, with potential for a factor of 8.

Conclusions:

Intracavity spatial aperture is an effective method for generating spectral broadening and chirp.
This technique allows for significant pulse compression without reaching the self-focusing limit.
The Nd:YAG regenerative amplifier system demonstrates a viable path toward higher pulse compression ratios.