Applied Physics B

, 122:30 | Cite as

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

Article

Abstract

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.

Notes

Acknowledgments

We acknowledge funding from the European Research Council and the Munich-Centre of Advanced Photonics. M.V.T. acknowledges support under the agreement 02.B.49.21.0003 between Ministry of Science and Education of Russia and University of Nizhny Novgorod and by RFBR Grant 15-02-08328.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  1. 1.University of Nizhny NovgorodNizhny NovgorodRussia
  2. 2.Ludwig-Maximilians-Universität MünchenGarchingGermany
  3. 3.Max-Planck-Institute of Quantum OpticsGarchingGermany

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