Field-programmable gate array-based residual amplitude modulation suppression and control for compact atomic clocks

We designed a field-programmable gate array (FPGA) fabric to provide phase modulation techniques to lock lasers to optical frequency references. The method incorporates an active residual amplitude modulation (RAM) suppression scheme that relies on complex modulation. All the required servos to cons...

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Veröffentlicht in:	Review of scientific instruments 2024-02, Vol.95 (2)
Hauptverfasser:	Nguyen, Tin Nghia, Schibli, Thomas R.
Format:	Artikel
Sprache:	eng
Schlagworte:	Amplitude modulation Atomic clocks Field programmable gate arrays Optical frequency Phase modulation Rubidium
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container_title	Review of scientific instruments
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creator	Nguyen, Tin Nghia Schibli, Thomas R.
description	We designed a field-programmable gate array (FPGA) fabric to provide phase modulation techniques to lock lasers to optical frequency references. The method incorporates an active residual amplitude modulation (RAM) suppression scheme that relies on complex modulation. All the required servos to construct an optical atomic clock are incorporated into the same low-cost, commercial FPGA chip. We demonstrate a reliable, long-term RAM suppression of 60 dB with the remaining RAM level at −100 dBc and an improved stability of three decades when applied on a two-photon rubidium clock.
doi_str_mv	10.1063/5.0185763
format	Article
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source	American Institute of Physics (AIP) Journals; Alma/SFX Local Collection
subjects	Amplitude modulation Atomic clocks Field programmable gate arrays Optical frequency Phase modulation Rubidium
title	Field-programmable gate array-based residual amplitude modulation suppression and control for compact atomic clocks
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