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Frequency comb up- and down-conversion in synchronously driven chi((2)) optical microresonators
Optical frequency combs are Key to optical precision measurements. While most frequency combs operate in the near-infrared (NIR) regime, many applications require combs at mid-infrared (MIR), visible (VIS), or even ultra-violet (UV) wavelengths. Frequency combs can be transferred to other wavelengths via nonlinear optical processes; however, this becomes exceedingly challenging for high-repetition-rate frequency combs. Here it is demonstrated that a synchronously driven high-Q microresonator with a second-order optical nonlinearity can efficiently convert high-repetition-rate MR frequency combs to VIS, UV, and MIR wavelengths, providing new opportunities for microresonator and electro-optic combs in applications including molecular sensing, astronomy, and quantum optics. (C) 2018 Optical Society of America

Authors: S. J. Herr, V. Brasch, J. Szabados, E. Obrzud, Y. C. Jia, S. Lecomte, et al.

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