Near-optimal intense and powerful terahertz source by optical rectification in lithium niobate crystal

Using a 400 μJ ytterbium laser combined with a novel pulse compression technique, we demonstrate a state-of-the-art terahertz (THz) source from the tilted-pulse front pumping scheme in lithium niobate at room temperature with record efficiency of 1.3% capable of generating 74 mW of average power and...

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Bibliographic Details
Published in:Photonics research (Washington, DC) DC), 2022-02, Vol.10 (2), p.340
Main Authors: Guiramand, L., Nkeck, J. E., Ropagnol, X., Ozaki, T., Blanchard, F.
Format: Article
Language:English
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Summary:Using a 400 μJ ytterbium laser combined with a novel pulse compression technique, we demonstrate a state-of-the-art terahertz (THz) source from the tilted-pulse front pumping scheme in lithium niobate at room temperature with record efficiency of 1.3% capable of generating 74 mW of average power and 400 kV/cm at focus. Key points of this demonstration include the use of a pump pulse duration of 280 fs in combination with a stair-step echelon mirror and an off-axis ellipsoidal mirror. This source has unmatched characteristics of generating intense and powerful THz pulses at the same time and remains highly scalable as compared to existing Ti:sapphire-based THz sources pumped in the millijoule range.
ISSN:2327-9125
2327-9125
DOI:10.1364/PRJ.428418