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High-average-power, intense THz pulses from a LiNbO3 slab with silicon output coupler

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2016

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Ehberger, Dominik

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https://doi.org/10.1007/s00340-015-6315-6
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Applied Physics B: Lasers and Optics. 2016, 122(2), 30. ISSN 0946-2171. eISSN 1432-0649. Available under: doi: 10.1007/s00340-015-6315-6

Zusammenfassung

Many applications of THz radiation require high fields and high repetition rates at the same time, implying substantial average power levels. Here, we report high-power Cherenkov-type THz generation in a LiNbO3 slab covered with a silicon prism outcoupler, a geometry in which the ratio between heat-removing surfaces and pump volume is naturally maximized for facilitating heat removal. At a conversion efficiency of 0.04 %, we achieve ~100 times more output power than before with such geometry. Although about 10 % of the 15 W pump power is converted to heat via multi-photon absorption effects, the peak crystal temperature increases by only 8 K. This result is due to the focus’ extreme aspect ratio of ~100, indicating the scalability of the approach to even higher average power levels. A line-shaped focus should be advantageous for removing heat in other optical conversions as well.

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ISO 690TSAREV, Maxim V., Dominik EHBERGER, Peter BAUM, 2016. High-average-power, intense THz pulses from a LiNbO3 slab with silicon output coupler. In: Applied Physics B: Lasers and Optics. 2016, 122(2), 30. ISSN 0946-2171. eISSN 1432-0649. Available under: doi: 10.1007/s00340-015-6315-6
BibTex
@article{Tsarev2016-02Higha-43265,
  year={2016},
  doi={10.1007/s00340-015-6315-6},
  title={High-average-power, intense THz pulses from a LiNbO<sub>3</sub> slab with silicon output coupler},
  number={2},
  volume={122},
  issn={0946-2171},
  journal={Applied Physics B: Lasers and Optics},
  author={Tsarev, Maxim V. and Ehberger, Dominik and Baum, Peter},
  note={Article Number: 30}
}
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