65 citations · 244 across the 8 of their papers we have counts for
8 papers
Guidelines for developing optical clocks with fractional frequency uncertainty
Moustafa Abdel-Hafiz, Piotr Ablewski, Ali Al-Masoudi +42
There has been tremendous progress in the performance of optical frequency standards since the first proposals to carry out precision spectroscopy on trapped, single ions in the 19…
Towards a Transportable Aluminium Ion Quantum Logic Optical Clock
S. Hannig, L. Pelzer, N. Scharnhorst +7
With the advent of optical clocks featuring fractional frequency uncertainties on the order of and below, new applications such as chronometric levelling with few-cm hei…
Multi-mode double-bright EIT cooling
Nils Scharnhorst, Javier Cerrillo, Johannes Kramer +4
We developed a multi-mode ground state cooling technique based on electromagnetically-induced transparency (EIT). By involving an additional ground and excited state, two individua…
Experimental and theoretical investigation of a multi-mode cooling scheme using multiple EIT resonances
Nils Scharnhorst, Javier Cerrillo, Johannes Kramer +4
We introduce and demonstrate double-bright electromagnetically induced transparency (D-EIT) cooling as a novel approach to EIT cooling. By involving an additional ground state, two…
On-Line Estimation of Local Oscillator Noise and Optimisation of Servo Parameters in Atomic Clocks
Ian D. Leroux, Nils Scharnhorst, Stephan Hannig +4
For atomic frequency standards in which fluctuations of the local oscillator (LO) frequency are the dominant noise source, we examine the role of the servo algorithm that predicts…
A tunable low-drift laser stabilized to an atomic reference
Tobias Leopold, Lisa Schmöger, Stefanie Feuchtenbeiner +6
We present a laser system with a linewidth and long-term frequency stability at the 50 kHz level. It is based on a Ti:Sapphire laser emitting radiation at 882 nm which is reference…
High-bandwidth transfer of phase stability through a fiber frequency comb
Nils Scharnhorst, Jannes B. Wübbena, Stephan Hannig +4
We demonstrate phase locking of a 729 nm diode laser to a 1542 nm master laser via an erbium-doped-fiber frequency comb, using a transfer-oscillator feedforward scheme which suppre…
Precision spectroscopy by photon-recoil signal amplification
Yong Wan, Florian Gebert, Jannes B. Wübbena +7
Precision spectroscopy of atomic and molecular ions offers a window to new physics, but is typically limited to species with a cycling transition for laser cooling and detection. Q…