16 February 2018 Electro-optic tuning of potassium tantalate-niobate whispering gallery resonators
Author Affiliations +
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.
Conference Presentation
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jan Szabados, Jan Szabados, Sushanth Kini Manjeshwar, Sushanth Kini Manjeshwar, Ingo Breunig, Ingo Breunig, Karsten Buse, Karsten Buse, } "Electro-optic tuning of potassium tantalate-niobate whispering gallery resonators", Proc. SPIE 10518, Laser Resonators, Microresonators, and Beam Control XX, 1051802 (16 February 2018); doi: 10.1117/12.2287423; https://doi.org/10.1117/12.2287423


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