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arXiv · 2009.10784

300 GHz wave with attosecond-level timing noise

Tomohiro Tetsumoto·Tadao Nagatsuma·Martin E. Fermann·Gabriele Navickaite·Michael Geiselmann·Antoine Rolland
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Abstract

Optical frequency division (OFD) via optical frequency combs (OFC) has enabled a leap in microwave metrology leading to noise performance never explored before. Extending the method to millimeter-wave (mmW) and terahertz (THz)-wave domain is of great interest. Dissipative Kerr solitons (DKSs) in integrated photonic chips offer a unique feature of delivering OFCs with ultrahigh repetition rates from 10 GHz to 1 THz making them relevant gears to perform OFD in the mmW and THz-wave domain. We experimentally demonstrate OFD of an optically-carried 3.6 THz reference down to 300 GHz through a DKS, photodetected with an ultrafast uni-traveling-carrier photodiode (UTC-PD). A new measurement system, based on the characterization of a microwave reference phase-locked to the 300 GHz signal under test, yields attosecond-level timing noise sensitivity, leveraging conventional technical limitations. This work places DKSs as a leading technology in the mmW and THz-wave field promising breakthroughs in fundamental and civilian applications.

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Tomohiro Tetsumoto, Tadao Nagatsuma, Martin E. Fermann, Gabriele Navickaite, Michael Geiselmann, Antoine Rolland. 2020-09-22. 300 GHz wave with attosecond-level timing noise. https://doi.org/10.1038/s41566-021-00790-2

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