Stefan Alaric Schäffer

Stefan Alaric Schäffer

Postdoc

ORCID: 0000-0002-5296-0332

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  1. Towards an Active Optical Clock using an Optical Conveyor within a Ring Cavity

    Kazakov, G., Dubey, S., Fama, F., Zhou, Z. S., Beli Silva, C., Schäffer, Stefan Alaric, Bennetts, S. & Schreck, F., 7 Jul 2021, 2021 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium, EFTF/IFCS 2021 - Proceedings. Gainesville, Fl, USA: IEEE, Vol. 21403938.

    Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

  2. Published

    Prospects of a superradiant laser based on a thermal or guided beam of 88Sr

    Tang, M., Schäffer, Stefan Alaric & Müller, Jörg Helge, 9 Dec 2022, In: Physical Review A. 106, 6, 10 p., 063704.

    Research output: Contribution to journal › Journal article › Research › peer-review

  3. 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. 357-362

    Research output: Contribution to journal › Conference article › Research › peer-review

  4. 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

  5. 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

  6. 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

  7. Published

    Atomic clock performance enabling geodesy below the centimetre level

    McGrew, W. F., Zhang, X., Fasano, R. J., Schäffer, Stefan Alaric, Beloy, K., Nicolodi, D., Brown, R. C., Hinkley, N., Milani, G., Schioppo, M., Yoon, T. H. & Ludlow, A. D., 6 Dec 2018, In: Nature. 564, 7734, p. 87-90

    Research output: Contribution to journal › Journal article › Research › peer-review

  8. Published

    Det aktive atomur - en laser i sin reneste form

    Tang, M. & Schäffer, Stefan Alaric, 1 Dec 2018, In: Kvant. 4, p. 20-23

    Research output: Contribution to journal › Journal article › Communication

  9. 10-18 optical atomic clock comparisons within the boulder atomic clock network

    Nardelli, N. V., Beloy, K., Bodine, M. I., Bothwell, T., Brewer, S., Bromley, S., Clements, E., Deschenes, J. D., Diddams, S. A., Fasano, R., Fortier, T. M., Hassan, Y., Hume, D. H., Kedar, D., Kennedy, C. J., Khader, I., Koepke, A., Leibrandt, D. R., Leopardi, H., Ludlow, A. & 13 others, McGrew, W. F., Milner, W., Newbury, N., Nicolodi, D., Oelker, E., Parker, T., Robinson, J. M., Schäffer, Stefan Alaric, Sherman, J. A., Sinclair, L. C., Sonderhouse, L., Swann, W. C. & Wineland, D. J., 15 May 2020, In: Cleo. F183, STh3G.3.

    Research output: Contribution to journal › Conference article › Research › peer-review

  10. 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

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