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Proceedings Paper

Electro-optic tuning of potassium tantalate-niobate whispering gallery resonators
Author(s): Jan Szabados; Sushanth Kini Manjeshwar; Ingo Breunig; Karsten Buse
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Paper Abstract

Most centrosymmetric materials exhibit a neglectable electro-optic response; the Pockels coefficients are zero, while the DC-Kerr coefficients are typically small. For a standard material such as silica they are on the order of 10−22 m2/V2 . 1 Thus, refractive index tuning is achieved by thermal or mechanical means. Potassium tantalateniobate (KTa1−xNbxO3 with 0 < x < 1, KTN) is a rare exception. It offers outstandingly high DC-Kerr coefficients in the 10−15 m2/V2 range.2 In this contribution, the first-ever KTN whispering gallery resonators (WGR) are demonstrated with quality factors Q > 107 and electro-optic eigenfrequency tuning of more than 100 GHz at λ = 1040 nm for moderate field strengths of 250 V/mm. These results potentially pave the way for applications such as electro-optically tunable Kerr frequency combs.

Paper Details

Date Published: 16 February 2018
PDF: 7 pages
Proc. SPIE 10518, Laser Resonators, Microresonators, and Beam Control XX, 1051802 (16 February 2018); doi: 10.1117/12.2287423
Show Author Affiliations
Jan Szabados, Univ. of Freiburg (Germany)
Sushanth Kini Manjeshwar, Univ. of Freiburg (Germany)
Ingo Breunig, Univ. of Freiburg (Germany)
Fraunhofer-Institut für Physikalische Messtechnik (Germany)
Karsten Buse, Univ. of Freiburg (Germany)
Fraunhofer-Institut für Physikalische Messtechnik (Germany)

Published in SPIE Proceedings Vol. 10518:
Laser Resonators, Microresonators, and Beam Control XX
Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko, Editor(s)

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