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Updated: Jul 10, 2026
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20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
Published on: July 12, 2017
Sub-20-fs terawatt-class laser system with a mirrorless regenerative amplifier and an adaptive phase controller
Optics Letters
|November 21, 2007
Summary
Researchers created a novel ultrabroadband regenerative amplifier using a mirrorless cavity. This breakthrough achieves 16-fs pulse widths and 13-mJ energy, advancing ultrafast laser technology.
Area of Science:
- Ultrafast optics
- Laser physics
- Nonlinear optics
Background:
- Dielectric coatings on cavity mirrors limit bandwidth in regenerative amplifiers.
- Material dispersion in optical components can degrade ultrashort laser pulses.
Purpose of the Study:
- To develop an ultrabroadband regenerative amplifier overcoming mirror bandwidth limitations.
- To compensate for material dispersion in a mirrorless cavity design.
Main Methods:
- Implemented a mirrorless cavity design using Pellin-Broca prisms.
- Employed a hybrid dispersion compensation technique with Brewster prism pairs.
- Utilized an adaptive phase controller with a liquid-crystal spatial light modulator.
Main Results:
- Achieved a 16-fs pulse width.
- Obtained a pulse energy of 13 mJ.
- Demonstrated the highest energy in the sub-20-fs regime using an adaptive phase controller.
Conclusions:
- The mirrorless cavity design effectively eliminates bandwidth limitations imposed by dielectric coatings.
- Hybrid dispersion compensation and adaptive phase control are crucial for achieving high-energy, ultrashort pulses.
- This technology represents a significant advancement in ultrafast laser systems.
