Cesium Based Laser-Atomic Oscillator
Abstract
We report the first demonstration of a laser-atomic oscillator with cesium (Cs) atoms. A laser-atomic oscillator (LAO) is analogous to an active mode-locked laser with a self-excited modulator, i.e. atoms, at a ground-state hyperfine transition frequency. Therefore, a LAO can be configured as the simplest active atomic clock or a self-oscillating, earth-field atomic magnetometer that delivers oscillation signals both optically and electrically. With the current experimental Cs-LAO setup, when it is configured as an atomic clock using the 0--0 hyperfine transition, the short-term fractional frequency instability is around 10−10 level. When it is configured as a self-oscillating magnetometer using a magnetically-sensitive hyperfine transition, the magnetic field sensitivity is around 100 fT/√(Hz) at 60 Hz. The presented Cs-LAO uses a cavity length from ∼6.5 cm to ∼11.4 cm. Ultimately, the minimal length of a Cs-LAO device can be ≤1.63 cm. Our new efforts unlock the potential of building truly chip-scale atomic clocks and magnetometers.
Versions
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BibTeX
@misc{pandey2026cesium,
title = {{Cesium Based Laser-Atomic Oscillator}},
author = {Saurabh Pandey and Roger Ding and George Burns and Yuan-Yu Jau},
howpublished = {arXiv},
year = {2026},
month = jun,
doi = {10.48550/arxiv.2606.32019},
eprint = {2606.32019},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2606.32019},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Cesium Based Laser-Atomic Oscillator
AU - Saurabh Pandey
AU - Roger Ding
AU - George Burns
AU - Yuan-Yu Jau
PY - 2026
DA - 2026/06/30
PB - arXiv
DO - 10.48550/arxiv.2606.32019
UR - https://arxiv.org/abs/2606.32019
AB - We report the first demonstration of a laser-atomic oscillator with cesium (Cs) atoms. A laser-atomic oscillator (LAO) is analogous to an active mode-locked laser with a self-excited modulator, i.e. atoms, at a ground-state hyperfine transition frequency. Therefore, a LAO can be configured as the simplest active atomic clock or a self-oscillating, earth-field atomic magnetometer that delivers oscillation signals both optically and electrically. With the current experimental Cs-LAO setup, when it is configured as an atomic clock using the 0--0 hyperfine transition, the short-term fractional frequency instability is around 10^−10 level. When it is configured as a self-oscillating magnetometer using a magnetically-sensitive hyperfine transition, the magnetic field sensitivity is around 100 fT/√(Hz) at 60 Hz. The presented Cs-LAO uses a cavity length from ∼6.5 cm to ∼11.4 cm. Ultimately, the minimal length of a Cs-LAO device can be ≤1.63 cm. Our new efforts unlock the potential of building truly chip-scale atomic clocks and magnetometers.
ER -