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Updated: Feb 1, 2026
10:17
20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
Published on: July 12, 2017
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Optical rectification of a 100 W average power mode-locked thin-disk oscillator
Optics Letters
|December 15, 2018
Summary
We achieved megahertz repetition rate terahertz (THz) generation using high-power lasers and Gallium Phosphide (GaP) crystals. This breakthrough enables powerful, ultrafast laser-pumped THz sources.
Area of Science:
- Optics and Photonics
- Solid-State Physics
- Terahertz Science
Background:
- High-power ultrafast lasers are crucial for advanced applications.
- Terahertz (THz) generation via optical rectification is a key technique.
- Existing THz sources often lack sufficient power or repetition rate.
Purpose of the Study:
- To demonstrate THz generation at megahertz repetition rates using high-power lasers.
- To explore optical rectification in Gallium Phosphide (GaP) crystals with high excitation power.
- To pave the way for high-average-power, ultrafast laser-pumped THz sources.
Main Methods:
- Utilized a diode-pumped Yb:YAG SESAM-mode-locked thin-disk laser delivering 580 fs pulses at 13.4 MHz and >100 W average power.
- Employed optical rectification in GaP crystals for THz generation.
- Measured THz average power using calibrated detectors.
Main Results:
- Achieved THz generation at a 13.4 MHz repetition rate.
- Observed THz output with a maximum average power of 78 μW at 0.8 THz.
- Demonstrated successful THz generation using >100 W average power excitation levels.
Conclusions:
- Optical rectification of high-average-power ultrafast lasers in nonlinear crystals is feasible.
- The study demonstrates a viable path towards developing high-power, ultrafast laser-driven THz sources.
- This work advances the capabilities of THz generation for scientific and technological applications.
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