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

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Active-passive mode-locked Nd:YAG oscillator.

M A Lewis, J T Knudtson

|April 17, 2010

Summary

This summary is machine-generated.

Active-passive mode-locked Nd:YAG lasers offer superior shot-to-shot reproducibility over passive methods. This study details parameters affecting pulse width and stability, achieving 35.9 psec pulses with 166 microJ energy.

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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

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Area of Science:

Laser Physics
Quantum Optics
Materials Science

Background:

Mode-locked lasers are crucial for high-intensity applications.
Passive mode-locking techniques often suffer from instability.
Nd:YAG lasers are widely used in scientific research and industry.

Purpose of the Study:

To investigate an active-passive mode-locked Nd:YAG oscillator.
To compare its shot-to-shot reproducibility with passive mode-locking.
To analyze the impact of key parameters on laser performance.

Main Methods:

Utilized an active-passive mode-locked Nd:YAG laser system.
Varied modulator drive power, cavity length, and intracavity etalon presence.
Employed two-photon-fluorescence techniques for pulse width measurement.

Main Results:

Achieved significantly improved shot-to-shot reproducibility compared to passive mode-locking.
Quantified the effects of modulator drive power, cavity length, and etalons.
Measured a pulse width of 35.9 ± 1.7 picoseconds.
Determined a corresponding pulse energy of 166 ± 6 microjoules.

Conclusions:

Active-passive mode-locking provides enhanced stability for Nd:YAG lasers.
Precise control over laser parameters is key to optimizing pulse characteristics.
The developed system is suitable for applications requiring reproducible, high-energy pulses.