Stefan Alaric Schäffer
Postdoc
Quantop
Blegdamsvej 17
2100 København Ø
- Published
Lasing on a narrow transition in a cold thermal strontium ensemble
Schäffer, Stefan Alaric, Tang, M., Henriksen, M. R., Jørgensen, Asbjørn Arvad, Christensen, B. T. R. & Thomsen, Jan Westenkær, 17 Jan 2020, In: Physical Review A. 101, 1, 9 p., 013819.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Laser stabilization on velocity dependent nonlinear dispersion of Sr atoms in an optical cavity: In Frequency Control Symposium & the European Frequency and Time Forum
Christensen, B. T. R., Schäffer, Stefan Alaric, Henriksen, M. R., Westergaard, P. G., Ye, J. & Thomsen, Jan Westenkær, 10 Apr 2015, In: Proceedings of the IEEE. p. 357-362Research output: Contribution to journal › Conference article › Research › peer-review
- Published
Large waist cavity for ultra-narrow transition spectroscopy
Schäffer, Stefan Alaric, Adsersen, S. S., Christensen, B. T. R. & Thomsen, Jan Westenkær, 12 Apr 2015, 2015 Joint Conference of the IEEE International Frequency Control Symposium & the European Frequency and Time Forum . IEEE ed. Denver,CO, p. 625-629 15285778. (IEEE International Frequency Control Symposium & the European Frequency and Time Forum; No. 15285778).Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review
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Incorporating an Optical Clock into a Time Scale at NIST: Simulations and Preliminary Real-Data Analysis
Sherman, J., Fortier, T., Yao, J., Parker, J., Levine, T., Savory, J., Romisch, S., McGrew, W., Zhang, X., Nicolodi, D., Fasano, R., Schäffer, Stefan Alaric, Beloy, K. & Ludlow, A., 29 Jan 2018, Proceedings of the 49th Annual Precise Time and Time Interval Systems and Applications Meeting. Reston, Virginia : Wiley, p. 11-21Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review
Frequency ratio measurements at 18-digit accuracy using an optical clock network
Boulder Atomic Clock Optical Network (BACON) Collaboration*, B. A. C. O. N. (. C., 25 Mar 2021, In: Nature. 591, 7851, p. 564-569 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Faraday-Shielded dc Stark-Shift-Free Optical Lattice Clock
Beloy, K., Zhang, X., McGrew, W. F., Hinkley, N., Yoon, T. H., Nicolodi, D., Fasano, R. J., Schäffer, Stefan Alaric, Brown, R. C. & Ludlow, A. D., 2 May 2018, In: Physical Review Letters. 120, 18, 5 p., 183201.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Dynamics of bad-cavity-enhanced interaction with cold Sr atoms for laser stabilization
Schäffer, Stefan Alaric, Christensen, B. T. R., Henriksen, M. R. & Thomsen, Jan Westenkær, 24 Jul 2017, In: Physical Review A. 96, 1, 013847.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Det aktive atomur - en laser i sin reneste form
Tang, M. & Schäffer, Stefan Alaric, 1 Dec 2018, In: Kvant. 4, p. 20-23Research output: Contribution to journal › Journal article › Communication
- Published
Collectively enhanced Ramsey readout by cavity sub- to superradiant transition
Bohr, Eliot, Kristensen, Sofus Laguna, Hotter, C., Schäffer, Stefan Alaric, Robinson-Tait, Julian Curry, Thomsen, Jan Westenkær, Zelevinsky, Tanya, Ritsch, H. & Müller, Jörg Helge, 5 Feb 2024, In: Nature Communications. 15, 7 p., 1084.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Cavity-enhanced optical clocks
Schäffer, Stefan Alaric, 2019, Niels Bohr Institute, Faculty of Science, University of Copenhagen.Research output: Book/Report › Ph.D. thesis › Research
ID: 143261181
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Towards passive and active laser stabilization using cavity-enhanced atomic interaction
Research output: Contribution to journal › Journal article › Research › peer-review
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152
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Towards the optical second: verifying optical clocks at the SI limit
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AEDGE: Atomic Experiment for Dark Matter and Gravity Exploration in Space
Research output: Contribution to journal › Journal article › Research › peer-review
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