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Updated: Jun 20, 2026
10:17
20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
Published on: July 12, 2017
Bifurcation suppression for stability improvement in Nd:YVO4 regenerative amplifier
Mikhail Grishin1, Vidmantas Gulbinas, Andrejus Michailovas
1Institute of Physics, Savanoriu ave 231, LT-02300 Vilnius, Lithuania. m.grishin@ekspla.com
Optics Express
|September 3, 2009
Summary
High pulse repetition rates in regenerative amplifiers cause energy instability. Increasing seed pulse energy, via a preamplifier, stabilizes operation up to 200 kHz, achieving near-theoretical output power.
Area of Science:
- Laser physics
- Nonlinear optics
Background:
- Continuously pumped regenerative amplifiers can suffer energy instability at high pulse repetition rates.
- Period doubling bifurcation is a key mechanism causing this instability.
- Understanding and mitigating these instabilities is crucial for high-power laser systems.
Purpose of the Study:
- To differentiate and understand instability effects in Nd:YVO4 regenerative amplifiers.
- To analyze techniques for optimizing regenerative amplifier performance.
- To achieve stable high-repetition-rate operation.
Main Methods:
- Theoretical analysis of instability mechanisms.
- Experimental investigation of Nd:YVO4 regenerative amplifier dynamics.
- Evaluation of seed pulse energy and preamplifier addition.
Main Results:
- Instability effects in Nd:YVO4 regenerative amplifiers were identified and understood.
- Increasing seed pulse energy was shown to improve amplification dynamics.
- A preamplifier enabled stable operation up to 200 kHz repetition rates.
- Average output power approached the theoretical limit.
Conclusions:
- Seed pulse energy is a critical parameter for stable regenerative amplifier operation.
- Preamplifier addition is an effective strategy for high-repetition-rate, high-power laser systems.
- Optimized Nd:YVO4 regenerative amplifiers can overcome period doubling bifurcation instabilities.
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