Optical frequency analysis on dark state of a single trapped ion

0525163 - ÚPT 2021 RIV US eng J - Journal Article
Lešundák, Adam - Pham, Minh Tuan - Čížek, Martin - Obšil, P. - Slodička, L. - Číp, Ondřej
Optical frequency analysis on dark state of a single trapped ion.
Optics Express. Roč. 28, č. 9 (2020), s. 13091-13103. ISSN 1094-4087
R&D Projects: GA ČR(CZ) GA19-14988S; GA MŠMT(CZ) EF16_026/0008460; GA MŠMT(CZ) LO1212; GA MŠMT ED0017/01/01
Institutional support: RVO:68081731
Keywords : laser beams * optical materials * optical signal processing
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 3.894, year: 2020
Method of publishing: Open access
https://www.osapublishing.org/oe/fulltext.cfm?uri=oe-28-9-13091&id=430228

We demonstrate an optical frequency analysis method using the Fourier transform of detection times of fluorescence photons emitted from a single trapped Ca-40(+) ion. The response of the detected photon rate to the relative laser frequency deviations is recorded within the slope of a dark resonance formed in the lambda-type energy level scheme corresponding to two optical dipole transitions. This approach enhances the sensitivity to the small frequency deviations and does so with reciprocal dependence on the fluorescence rate. The employed lasers are phase locked to an optical frequency comb, which allows for precise calibration of optical frequency analysis by deterministic modulation of the analyzed laser beam with respect to the reference beam. The attainable high signal-to-noise ratios of up to a MHz range of modulation deviations and up to a hundred kHz modulation frequencies promise the applicability of the presented results in a broad range of optical spectroscopic applications.
Permanent Link: http://hdl.handle.net/11104/0309362