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High repetition rate frequency comb up- and down-conversion in synchronously driven microresonators

: Szabados, Jan; Brasch, Victor; Herr, Simon J.; Obrzud, Ewelina; Jia, Yuechen; Lecomte, Steve; Buse, Karsten; Breunig, Ingo; Herr, Tobias


Kudryashov, Alexis V. (Hrsg.) ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Laser Resonators, Microresonators, and Beam Control XXI : 2-7 February 2019, San Francisco, California, United States
Bellingham, WA: SPIE, 2019 (Proceedings of SPIE 10904)
Paper 109040D, 8 pp.
Conference "Laser Resonators, Microresonators, and Beam Control" <21, 2019, San Francisco/Calif.>
Conference Paper
Fraunhofer IPM ()
optical frequency comb; nonlinear optic; high-Q microresonator; second harmonic generation; frequency conversion; lithium niobate; optical parametric oscillator; near infrared; ultraviolet radiation

Optical frequency combs are a key technology for optical precision measurements. So far, most frequency combs operate in the near-infrared regime (NIR). Many applications, however, require combs in the ultraviolet (UV), visible (VIS) or mid-infrared (MIR) spectral ranges. This can be achieved by making use of nonlinear-optical processes. In this contribution, we demonstrate the efficient conversion of frequency combs with a repetition rate of 21 GHz to UV, VIS and MIR wavelengths in a synchronously driven high-Q microresonator with second-order optical nonlinearity. This opens up a new path for applications including, but not limited to, molecular sensing and quantum optics.