Abstract

We demonstrate efficient multicycle terahertz pulse generation at 14.6 THz from large-area lithium niobate crystals by using high-energy (up to 2 J) femtosecond Ti:sapphire laser pulses. Such terahertz radiation is produced by phase-matched optical rectification in lithium niobate. Experimentally, we achieve maximal terahertz energy of 0.71 mJ with conversion efficiency of ${\sim}0.04\%$. Our experimental setup is simple and easily upscalable to produce multi-millijoule, multicycle terahertz radiation with proper lithium niobate crystals.

© 2020 Optical Society of America

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Supplementary Material (1)

NameDescription
» Visualization 1       An animation of time-domain terahertz pulse evolution (with gt;5 THz filtering) when excited by a femtosecond laser pulse propagating in lithium niobate.

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