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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
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Active alignment control system for thin disk regenerative amplifier.

J Horáček1, L Hubka2, M Chyla1

  • 1HiLASE Centre, Institute of Physics of the Czech Academy of Sciences, Za Radnicí 828, 252 41 Dolní Břežany, Czechia.

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Summary
This summary is machine-generated.

This study introduces an active alignment and stabilization system for thin-disk regenerative amplifiers. The novel method significantly enhances laser power and pointing stability, improving operational reliability.

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Area of Science:

  • Laser Physics
  • Optical Engineering

Background:

  • Regenerative amplifiers are crucial for high-power laser systems.
  • Maintaining stable laser power and beam pointing is challenging, especially during warm-up and long-term operation.

Purpose of the Study:

  • To develop and implement an active alignment and stabilization control system for thin-disk regenerative amplifiers.
  • To eliminate power and pointing instability during warm-up and improve long-term operational stability.

Main Methods:

  • A four-mirror control system with motorized mirrors inside and outside the regenerative amplifier cavity.
  • Integration of four camera detectors for monitoring and feedback.
  • Mitigation of piezoelectric actuator hysteresis for precise pointing control.

Main Results:

  • Achieved a significant increase in power stability, reducing RMS from 1.87% to 0.79% and peak-to-peak from 7.43% to 3.88%.
  • Demonstrated substantial improvement in beam positional stability, up to a sixfold enhancement.
  • Successfully addressed pointing instability at the compressor input using external mirrors.

Conclusions:

  • The active alignment and stabilization system effectively enhances both power and pointing stability in thin-disk regenerative amplifiers.
  • The system provides robust long-term operational stability, crucial for demanding laser applications.
  • The multi-mirror control strategy offers a comprehensive solution for complex laser alignment challenges.