dorsal/arxiv
View SchemaMeasurement of excited-state transitions in cold calcium atoms by direct femtosecond frequency-comb spectroscopy
| Authors | J. E. Stalnaker, Y. Le Coq, T. M. Fortier, S. A. Diddams, C. W. Oates, L. Hollberg |
|---|---|
| Categories | |
| ArXiv ID | physics/0701187 |
| URL | https://arxiv.org/abs/physics/0701187 |
| DOI | 10.1103/PhysRevA.75.040502 |
| Journal | Phys. Rev. A 75 (rapid comm.), 040502 (2007) |
Abstract
We apply direct frequency-comb spectroscopy, in combination with precision cw spectroscopy, to measure the ${\rm 4s4p} ^3P_1 \to {\rm 4s5s} ^3S_1$ transition frequency in cold calcium atoms. A 657 nm ultrastable cw laser was used to excite atoms on the narrow ($\gamma \sim 400$ Hz) ${\rm 4s^2} ^1S_0 \to {\rm 4s4p} ^3P_1$ clock transition, and the direct output of the frequency comb was used to excite those atoms from the ${\rm 4s4p} ^3P_1$ state to the ${\rm 4s5s} ^3S_1$ state. The resonance of this second stage was detected by observing a decrease in population of the ground state as a result of atoms being optically pumped to the metastable ${\rm 4s4p} ^3P_{0,2}$ states. The ${\rm 4s4p} ^3P_1 \to {\rm 4s5s} ^3S_1$ transition frequency is measured to be $\nu = 489 544 285 713(56)$ kHz; which is an improvement by almost four orders of magnitude over the previously measured value. In addition, we demonstrate spectroscopy on magnetically trapped atoms in the ${\rm 4s4p} ^3P_2$ state.
{
"annotation_id": "e756136e-490b-4ed5-ac73-96c551c4692b",
"date_created": "2026-03-02T18:01:17.636000Z",
"date_modified": "2026-03-02T18:01:17.636000Z",
"file_hash": "b8b77c8d6c6ae324699a1b8e99937b8ca4bd93aab87e262269b665e30f9afee0",
"private": false,
"record": {
"abstract": "We apply direct frequency-comb spectroscopy, in combination with precision cw\nspectroscopy, to measure the ${\\rm 4s4p} ^3P_1 \\to {\\rm 4s5s} ^3S_1$ transition\nfrequency in cold calcium atoms. A 657 nm ultrastable cw laser was used to\nexcite atoms on the narrow ($\\gamma \\sim 400$ Hz) ${\\rm 4s^2} ^1S_0 \\to {\\rm\n4s4p} ^3P_1$ clock transition, and the direct output of the frequency comb was\nused to excite those atoms from the ${\\rm 4s4p} ^3P_1$ state to the ${\\rm 4s5s}\n^3S_1$ state. The resonance of this second stage was detected by observing a\ndecrease in population of the ground state as a result of atoms being optically\npumped to the metastable ${\\rm 4s4p} ^3P_{0,2}$ states. The ${\\rm 4s4p} ^3P_1\n\\to {\\rm 4s5s} ^3S_1$ transition frequency is measured to be $\\nu = 489 544 285\n713(56)$ kHz; which is an improvement by almost four orders of magnitude over\nthe previously measured value. In addition, we demonstrate spectroscopy on\nmagnetically trapped atoms in the ${\\rm 4s4p} ^3P_2$ state.",
"arxiv_id": "physics/0701187",
"authors": [
"J. E. Stalnaker",
"Y. Le Coq",
"T. M. Fortier",
"S. A. Diddams",
"C. W. Oates",
"L. Hollberg"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1103/PhysRevA.75.040502",
"journal_ref": "Phys. Rev. A 75 (rapid comm.), 040502 (2007)",
"title": "Measurement of excited-state transitions in cold calcium atoms by direct femtosecond frequency-comb spectroscopy",
"url": "https://arxiv.org/abs/physics/0701187"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "102fa9dd-fdf5-4486-93e8-fd7122b458d3",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}