FPGA-based residual amplitude modulation suppression and control for compact atomic clocks
Atomic Physics
2023-11-02 v1
Abstract
We designed an 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 onto the same low-cost, commercial FPGA chip. We demonstrate a reliable, long-term RAM suppression 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.
Keywords
Cite
@article{arxiv.2311.00216,
title = {FPGA-based residual amplitude modulation suppression and control for compact atomic clocks},
author = {Tin Nghia Nguyen and Thomas R. Schibli},
journal= {arXiv preprint arXiv:2311.00216},
year = {2023}
}