Stefan Alaric Schäffer

Stefan Alaric Schäffer

Postdoc

ORCID: 0000-0002-5296-0332

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  1. Published

    Towards the optical second: verifying optical clocks at the SI limit

    McGrew, W. F., Zhang, X., Leopardi, H., Fasano, R. J., Nicolodi, D., Beloy, K., Yao, J., Sherman, J. A., Schäffer, Stefan Alaric, Savory, J., Brown, R. C., Romisch, S., Oates, C. W., Parker, T. E., Fortier, T. M. & Ludlow, A. D., 20 Apr 2019, In: Optica. 6, 4, p. 448-454

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

  2. Published

    Towards passive and active laser stabilization using cavity-enhanced atomic interaction

    Schäffer, Stefan Alaric, Christensen, B. T. R., Rathmann, S. M., Appel, Martin Hayhurst, Henriksen, M. R. & Thomsen, Jan Westenkær, 19 Jun 2017, In: Journal of Physics - Conference Series. 810, 1, 7 p., 012002.

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

  3. 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

  4. Published

    Towards Molecular Clocks Using Large Waist Cavity Enhanced Spectroscopy: FACT workshop

    Adsersen, S. S., Henriksen, M. R., Schäffer, Stefan Alaric & Thomsen, Jan Westenkær, 1 Sep 2015

    Research output: Other contribution › Research

  5. 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

  6. Published

    Progress on optical- clock-based time scale at NIST: Simulations and preliminary real-data analysis

    Yao, J., Sherman, J., Fortier, T., Leopardi, H., Parker, T., Levine, J., Savory, J., Romisch, S., McGrew, W., Zhang, X., Nicolodi, D., Fasano, R., Schäffer, Stefan Alaric, Beloy, K. & Ludlow, A., 19 Sep 2018, In: Navigation. 248, p. 1-8

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

  7. Optical-Clock-Based Time Scale

    Yao, J., Sherman, J. A., Fortier, T., Leopardi, H., Parker, T. E., McGrew, W., Zhang, X., Nicolodi, D., Fasano, R., Schäffer, Stefan Alaric, Beloy, K., Savory, J., Romisch, S., Oates, C., Diddams, S., Ludlow, A. D. & Levine, J., 30 Oct 2019, In: Physical Review Applied. 12, 4, 10 p., 044069.

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

  8. Published

    Optical frequency measurements at 1x10(-18) uncertainty with ytterbium optical lattice clocks

    Ludlow, A. D., McGrew, W. F., Zhang, X., Nicolodi, D., Fasano, R. J., Schäffer, Stefan Alaric, Brown, R. C., Fox, R. W., Hinkley, N., Yoon, T. H. & Beloy, K., 8 Jul 2018, 2018 Conference on Precision Electromagnetic Measurements (CPEM). Paris, France: IEEE

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

  9. Optical atomic clock comparison through turbulent air

    Bodine, M. I., Deschênes, J. D., Khader, I. H., Swann, W. C., Leopardi, H., Beloy, K., Bothwell, T., Brewer, S. M., Bromley, S. L., Chen, J. S., Diddams, S. A., Fasano, R. J., Fortier, T. M., Hassan, Y. S., Hume, D. B., Kedar, D., Kennedy, C. J., Koepke, A., Leibrandt, D. R., Ludlow, A. D. & 15 others, Mcgrew, W. F., Milner, W. R., Nicolodi, D., Oelker, E., Parker, T. E., Robinson, J. M., Romish, S., Schäffer, Stefan Alaric, Sherman, J. A., Sonderhouse, L., Yao, J., Ye, J., Zhang, X., Newbury, N. R. & Sinclair, L. C., Sep 2020, In: Physical Review Research. 2, 3, 033395.

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

  10. Published

    Nonlinear spectroscopy of Sr atoms in an optical cavity for laser stabilization

    Christensen, B. T. R., Henriksen, M. R., Schäffer, Stefan Alaric, Westergaard, P. G., Ye, J., Holland, M. & Thomsen, Jan Westenkær, 6 Nov 2015, In: Physical Review A (Atomic, Molecular and Optical Physics). 92, 053820.

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

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