2011/08/31 by Stephan Falke, Mattias Misera, Uwe Sterr +1 · 3 citations
Physics and Astronomy · #Advanced Fiber Laser Technologies #Advanced Frequency and Time Standards #Atomic clock #Atomic physics #Cold Atom Physics and Bose-Einstein Condensates #Doppler effect #Laser #Materials science #Optical fiber #Optical lattice #Optics #Path length #Phase (matter) #Physics #Strontium #Wavelength #physics.atom-ph #physics.optics
paper · pdf · doi:10.1007/s00340-012-4952-6
published as Applied Physics B - Lasers and Optics, Vol. 107, p 301 (2012) · 10 pages, 8 figures; Applied Physics B - Lasers and Optics 2011
arxiv created 2012/02/10 · openalex publication_date 2012/03/20 · arxiv updated 2012/08/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In optical clocks, transitions of ions or neutral atoms are interrogated using pulsed ultra-narrow laser fields. Systematic phase chirps of the laser or changes of the optical path length during the measurement cause a shift of the frequency seen by the interrogated atoms. While the stabilization of cw-optical links is now a well established technique even on long distances, phase stable links for pulsed light pose additional challanges and have not been demonstrated so far. In addition to possible temperature or pressure drift of the laboratory, which may lead to a Doppler shift by steadily changing the optical path length, the pulsing of the clock laser light calls for short settling times of stabilization locks. Our optical path length stabilization uses retro-reflected light from a mirror that is fixed with respect to the interrogated atoms and synthetic signals during the dark time. Length changes and frequency chirps are compensated for by the switching AOM. For our strontium optical lattice clock we have ensured that the shift introduced by the fiber link including the pulsing acousto optic modulator is below 2⋅ 10-17.