Optically-detected spin-echo method for relaxation times measurements in a Rb atomic vapor
We introduce and demonstrate an experimental method, optically-detected spin-echo (ODSE), to measure ground-state relaxation times of a rubidium (Rb) atomic vapor held in a glass cell with buffer-gas. The work is motivated by our studies on high-performance Rb atomic clocks, where both population an...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2017-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/aa73c2 |
| _version_ | 1797750611484082176 |
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| author | M Gharavipour C Affolderbach F Gruet I S Radojičić A J Krmpot B M Jelenković G Mileti |
| author_facet | M Gharavipour C Affolderbach F Gruet I S Radojičić A J Krmpot B M Jelenković G Mileti |
| author_sort | M Gharavipour |
| collection | DOAJ |
| description | We introduce and demonstrate an experimental method, optically-detected spin-echo (ODSE), to measure ground-state relaxation times of a rubidium (Rb) atomic vapor held in a glass cell with buffer-gas. The work is motivated by our studies on high-performance Rb atomic clocks, where both population and coherence relaxation times ( T _1 and T _2 , respectively) of the ‘clock transition’ (5 ^2 S _1/2 $| {F}_{g}\,=\,1,{m}_{F}=0\rangle \leftrightarrow | {F}_{g}=2,{m}_{F}=0\rangle $ ) are relevant. Our ODSE method is inspired by classical nuclear magnetic resonance spin-echo method, combined with optical detection. In contrast to other existing methods, like continuous-wave double-resonance (CW-DR) and Ramsey-DR, principles of the ODSE method allow suppression of decoherence arising from the inhomogeneity of the static magnetic field across the vapor cell, thus enabling measurements of intrinsic relaxation rates, as properties of the cell alone. Our experimental result for the coherence relaxation time, specific for the clock transition, measured with the ODSE method is in good agreement with the theoretical prediction, and the ODSE results are validated by comparison to those obtained with Franzen, CW-DR and Ramsey-DR methods. The method is of interest for a wide variety of quantum optics experiments with optical signal readout. |
| first_indexed | 2024-03-12T16:36:16Z |
| format | Article |
| id | doaj.art-3db5d375363e4839a1b5b79ef3c6d038 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:36:16Z |
| publishDate | 2017-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-3db5d375363e4839a1b5b79ef3c6d0382023-08-08T14:52:53ZengIOP PublishingNew Journal of Physics1367-26302017-01-0119606302710.1088/1367-2630/aa73c2Optically-detected spin-echo method for relaxation times measurements in a Rb atomic vaporM Gharavipour0C Affolderbach1F Gruet2I S Radojičić3A J Krmpot4B M Jelenković5G Mileti6Laboratoire Temps-Fréquence (LTF), Institut de Physique, Université de Neuchâtel , Neuchâtel CH-2000, SwitzerlandLaboratoire Temps-Fréquence (LTF), Institut de Physique, Université de Neuchâtel , Neuchâtel CH-2000, SwitzerlandLaboratoire Temps-Fréquence (LTF), Institut de Physique, Université de Neuchâtel , Neuchâtel CH-2000, SwitzerlandInstitute of Physics Belgrade, University of Belgrade , Pregrevica 118, 11080 Belgrade, SerbiaInstitute of Physics Belgrade, University of Belgrade , Pregrevica 118, 11080 Belgrade, SerbiaInstitute of Physics Belgrade, University of Belgrade , Pregrevica 118, 11080 Belgrade, SerbiaLaboratoire Temps-Fréquence (LTF), Institut de Physique, Université de Neuchâtel , Neuchâtel CH-2000, SwitzerlandWe introduce and demonstrate an experimental method, optically-detected spin-echo (ODSE), to measure ground-state relaxation times of a rubidium (Rb) atomic vapor held in a glass cell with buffer-gas. The work is motivated by our studies on high-performance Rb atomic clocks, where both population and coherence relaxation times ( T _1 and T _2 , respectively) of the ‘clock transition’ (5 ^2 S _1/2 $| {F}_{g}\,=\,1,{m}_{F}=0\rangle \leftrightarrow | {F}_{g}=2,{m}_{F}=0\rangle $ ) are relevant. Our ODSE method is inspired by classical nuclear magnetic resonance spin-echo method, combined with optical detection. In contrast to other existing methods, like continuous-wave double-resonance (CW-DR) and Ramsey-DR, principles of the ODSE method allow suppression of decoherence arising from the inhomogeneity of the static magnetic field across the vapor cell, thus enabling measurements of intrinsic relaxation rates, as properties of the cell alone. Our experimental result for the coherence relaxation time, specific for the clock transition, measured with the ODSE method is in good agreement with the theoretical prediction, and the ODSE results are validated by comparison to those obtained with Franzen, CW-DR and Ramsey-DR methods. The method is of interest for a wide variety of quantum optics experiments with optical signal readout.https://doi.org/10.1088/1367-2630/aa73c2relaxation timesvapor cell atomic clockspin-echooptical detectionRamsey scheme |
| spellingShingle | M Gharavipour C Affolderbach F Gruet I S Radojičić A J Krmpot B M Jelenković G Mileti Optically-detected spin-echo method for relaxation times measurements in a Rb atomic vapor New Journal of Physics relaxation times vapor cell atomic clock spin-echo optical detection Ramsey scheme |
| title | Optically-detected spin-echo method for relaxation times measurements in a Rb atomic vapor |
| title_full | Optically-detected spin-echo method for relaxation times measurements in a Rb atomic vapor |
| title_fullStr | Optically-detected spin-echo method for relaxation times measurements in a Rb atomic vapor |
| title_full_unstemmed | Optically-detected spin-echo method for relaxation times measurements in a Rb atomic vapor |
| title_short | Optically-detected spin-echo method for relaxation times measurements in a Rb atomic vapor |
| title_sort | optically detected spin echo method for relaxation times measurements in a rb atomic vapor |
| topic | relaxation times vapor cell atomic clock spin-echo optical detection Ramsey scheme |
| url | https://doi.org/10.1088/1367-2630/aa73c2 |
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