Conferences 2023:

• Ultracold Quantum Sensing 2023 (Leiden, NL) Program, Posters 
• IEEE-IFCS-EFTF 2023 (Toyama, JP), Talk and posters
• ICOLS 2023 (Estes Park, CO, USA), Posters
• Long-range interactions in the Quantum (San Sebastian, ES), Hot topic Talk

Conferences 2022:

• DOPS (Aarhus, Denmark) Talk and posters

Conferences 2021:

Conferences 2020:

Conferences 2019:

• DOPS ( Copenhagen, DK ), Poster.
  
  • M. Tang, S. A. Schäffer, M. R. Henriksen, A. A. Jørgensen, B. T. R Christensen and J. W. Thomsen: "Atom Dynamics of a Cold Strontium Laser".

Conferences 2018:

• DFS ( Fyn, DK ), Talk and Poster.
  • S. A. Schäffer, M. Tang, M. R. Henriksen, and J. W. Thomsen : "Lasing on a forbidden transition in cold 88 Sr — frequency references". Talk
  • M. Tang, S. A. Schäffer, M. R. Henriksen, A. A. Jørgensen, and J. W. Thomsen: "Dynamics of a laser using cold Sr atoms".
• 676 W.E. Haereus Seminar (Bonn, DE), Hot topic talk, Topical Talk, Poster. 
  • S. A. Schäffer, M. Tang, M. R. Henriksen, and J. W. Thomsen :"Lasing on a forbidden transition in a thermal cloud of Strontium atoms". Hot Topic
  • M. R. Henriksen, C. Raahauge, S. A. Schäffer, A. A. Jørgensen, and J. W. Thomsen: "Acetylene frequency reference". Topical Talk
  • A. A. Jørgensen, M. R. Henriksen, S. A. Schäffer, and J. W. Thomsen: "Folded-beam waist-expanding cavity for Iodine based frequency reference". Poster
• ICAP (Barcelona, ES), Poster. Abstracts
  • M. Tang, S. A. Schäffer, M. R. Henriksen, A. A. Jørgensen, J. W. Thomsen: "Modelling Lasing on a Forbidden Transition in a Thermal Cloud of Sr Atoms".
• 7th International Workshop on Ultra-cold Group II Atoms, (Beijing, CN), Program
  
  • B. T. R. Christensen, S. A. Schäffer, M. R. Henriksen, M. Tang, A. A. Jørgensen, and J. W. Thomsen: "Laser Stabilization with Thermal Atom-cavity Systems".

Conferences 2017:

• CLEO ( Santa Jose, CA, USA ), Poster. Abstracts.
  • M. R. Henriksen, A. N. Kamel, M. Pu, K. Yvind,  and J. W. Thomsen: "Towards Actively Stabilized Micro  Ring Resonator Based Frequency Combs".

Conferences 2016:

• ICSLS ( Torún, Poland ), Invited talk. 
  • S. A. Schäffer, B. T. R. Christensen, S. M. Rathmann, M. H. Appel, M. R. Henriksen, J. Ye, and J. W. Thomsen: "Towards passive and active laser stabilization using an ensemble of thermal strontium atoms with cavity-enhanced interaction".
• ECAMP ( Frankfurt, Germany ), Poster.
  • S. A. Schäffer, B. T. R. Christensen, S. M. Rathmann, M. H. Appel, M. R. Henriksen, J. Ye, and J. W. Thomsen: "Superflourescent-like Behaviour of an Ensemble of Thermal Stronitum Atoms with Cavity-Enhanced Interaction".

Conferences 2015:

• IFCS-EFTF ( Denver, CO, U.S.A. ), Invited paper, posters and talk. 
  • S. A. Schäffer, S. S. Adsersen, B. T. R. Christensen, J. W. Thomsen: "Large Waist Cavity for Ultra-narrow Transition Spectroscopy", Poster, Proceeding paper.
  • B. T. R. Christensen, S. A. Schäffer, M. R. Henriksen, P. G. Westergaard, J. Ye and J. W. Thomsen:"Laser Stabilization on Velocity Dependent Nonlinear Dispersion of Sr Atoms in an Optical Cavity", Talk, Poster prize, Proceeding paper.

Conferences 2014:

• IFCS ( Taipei, Taiwan ), Invited paper and talk.
  • B. T. R. Christensen, M. R. Henriksen, P. G. Westergaard, J. Ye and J. W. Thomsen: Prospects for Frequency Stabilization Using Collective Effects of Strontium Atoms in an Optical Cavity", Talk, Proceeding paper.
• EGAS 46 ( Lille, France ), Poster, Abstracts.
  • M. R. Henriksen, S. A. Schäffer, B. T. R. Christensen, P. G. Westergaard, J. Ye, and J. W. Thomsen: "Observing collective effects of Strontium in an optical cavity", Poster.
• ICAP ( Washington D. C., U.S.A. ).
• DOPS (Roskilde, Denmark), Contributed talk.
  • S. A. Schäffer, P. G. Westergaard, B. T. R. Christensen, M. R.
    Henriksen, R. Matin, D. Tieri, J.Cooper, M. Holland, J. Ye, and
    J. W. Thomsen: Observation of Motion Dependent Nonlinear Dispersion with Narrow Linewidth Atoms in an Optical Cavity, Talk.

PhD Theses:

OPTICAL FREQUENCY COMBS FROM MICRO RING RESONATORS (2022) Author: Asbjørn A. Jørgensen Supervisors: Jan W. Thomsen and Helge Müller
Optical Frequency References (2019) Author: Martin R. Henriksen Supervisor: J. W. Thomsen
Cavity-Enhanced Optical Atomic Clocks (2019) Author: Stefan A. Schäffer Supervisor: J. W. Thomsen
Laser Stabilization With Laser Cooled Strontium (2016) Author: Bjarke T. R. Christensen Supervisor: J. W. Thomsen
Production and Interrogation of Metastable Magnesium Atoms: Towards an Atomic Clock (2009) Author: Brian Bak Jensen Supervisors: J. W. Thomsen and A. Brusch
Investigation of Metastable Magnesium Atoms (2009) Author: Kasper T. Therkildsen Supervisors: J W. Thomsen and A. Brusch

Master Theses:

Atom Interferometry in an Optical Cavity – with optical lattice trapping on seconds timescale (2019) Author: Sofus L. Kristensen Supervisor: J. W. Thomsen External: H. Müller
Towards generation of an ultra low noise microwave signal from an optical Fabry-Perot cavity (2019) Author: Lars Emil Gutt Supervisors: A. A. Jørgensen, M. R. Henriksen, S. A. Schäffer and J. W. Thomsen
Modeling Lasing in a Thermal Strontium Ensemble (2018) Author: Mikkel Tang Supervisors: S. A. Schäffer and J. W. Thomsen
Cavity Enhanced Molecular Clocks and Their Applications (2018) Author: Christian Z. Raahauge Supervisors: M. R. Henriksen and J. W. Thomsen
Towards Continuous Cavity-Enhanced Spectroscopy on Cold Atoms (2018) Author: Mathias Bouchacourt Supervisors: S. A. Schäffer and J. W. Thomsen
Characterizing the lattice induced light shifts of the Ytterbium optical lattice clock (2017) Author: Asbjørn A. Jørgensen Supervisor: J. W. Thomsen External: H. Katori
Studies of collective spontaneous emission (2016) Author: Stefan M. Rathmann Supervisor: J. W. Thomsen and S. A. Schäffer
An Iodine Based Thermal Optical Frequency Reference using NICE-OHMS Detection (2016) Author: Sigrid S. Adsersen Supervisor: Jan W. Thomsen
Studies of Collective Effects in Atomic Strontium (2015) Author: Stefan A. Schäffer Supervisor: J. W. Thomsen
Cavity Enhanced Spectroscopy on Ultra Cold Atoms (2014) Author: Martin R. Henriksen Supervisor: J. W. Thomsen
Towards Continuous Cavity-Enhanced Nonlinear Spectroscopy in Strontium (2013) Author: Rastin Matin Supervisor: J. W. Thomsen
Clock laser system for a Hg optical lattice clock (2012) Author: Bjarke T. R. Christensen Supervisor: J. W. Thomsen External: H. Katori, N. Ohmae

Bachelor Theses:

Dispersion Measurements of AlGaAs Microring Resonators (2018) Authors: Caroline M. Nielsen Supervisors: M. R. Henriksen, A. A. Jørgensen, and  J. W. Thomsen
Locking an Optical Cavity using a Microcontroller (2018) Authors: Adam S. Knorr & Ida L. Stoustrup Supervisors: A. A. Jørgensen, M. R. Henriksen, and J. W. Thomsen
Ultra stable laser sources based on molecular acetylene (2017) Author: Parisah Akrami Supervisors: M. R. Henriksen and J. W. Thomsen
Doppler-Free Cavity Enhanced Spectroscopy of Molecular Iodine (2016) Author: Sofus L. Kristensen Supervisors: J. W. Thomsen and S. S. Adsersen
Cavity QED in Ultra-Cold Strontium Atoms (2015) Author: Morten Herskind Supervisor: J. W. Thomsen
Experimental Realization of Cavity Enhanced Spectroscopy on 88Sr (2014) Author: Hans Christian Stærkind Supervisor: J. W. Thomsen
Constructing an Extended Cavity Diode Laser for Iodine Spectrometry (2014) Author: Asbjørn Arvad Jørgensen Supervisors: J. W. Thomsen and B. T. R. Christensen
Experiments with ultra precise light sources (2011) Author: Amalie Christensen, Stefan A. Schäffer Supervisors: J. W. Thomsen and P. G. Westergaard
Characterization of the clock laser and spectroscopy of the 3P1 ↔ 1S0 clock transition in 24Mg (2010) Author: Heidi L. Sørensen, Bjarke T. R. Christensen Supervisors: J. W. Thomsen and A. Brusch