| Autor: |
Mukherjee, Shambo, Millo, Jacques, Marechal, Baptiste, Denis, Severine, Goavec-Merou, Gwenhael, Friedt, Jean-Michel, Kersale, Yann, Lacroute, Clement |
| Předmět: |
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| Zdroj: |
IEEE Transactions on Ultrasonics Ferroelectrics & Frequency Control; Feb2022, Vol. 9 Issue 2, p878-885, 8p |
| Abstrakt: |
Progress made in optical references, including ultrastable Fabry–Perot cavities, optical frequency combs, and optical atomic clocks, has driven the need for ultrastable optical fiber networks. Telecom-wavelength ultrapure optical signal transport has been demonstrated on distances ranging from the laboratory scale to the continental scale. In this article, we present a Doppler-cancellation setup based on a digital phase-locked loop (PLL) for ultrastable optical signal dissemination over fiber. The optical phase stabilization setup is based on a usual heterodyne Michelson-interferometer setup, while the software-defined radio (SDR) implementation of the PLL is based on a compact commercial board embedding a field-programmable gate array and analog-to-digital and digital-to-analog converters. Using three different configurations, including an undersampling method, we demonstrate a 20-m-long fiber link with residual fractional frequency instability as low as 10−18 at 1000 s and optical phase noise of −70 dBc/Hz at 1 Hz with a telecom frequency carrier. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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