132 citations · 320 across the 9 of their papers we have counts for
9 papers
A strontium optical lattice clock with uncertainty and measurement of its absolute frequency
Richard Hobson, William Bowden, Alissa Silva +5
We present a measurement of the absolute frequency of the 5s S to 5s5p P transition in Sr, which is a secondary representation of the SI second. We descr…
A pyramid MOT with integrated optical cavities as a cold atom platform for an optical lattice clock
William Bowden, Richard Hobson, Ian R. Hill +6
We realize a two-stage, hexagonal pyramid magneto-optical trap (MOT) with strontium, and demonstrate loading of cold atoms into cavity-enhanced 1D and 2D optical lattice traps, all…
Compact laser system for a laser-cooled ytterbium ion microwave frequency standard
S. Mulholland, H. A. Klein, G. P. Barwood +6
The development of a transportable microwave frequency standard based on the ground-state transition of at ~12.6 GHz requires a compact laser system for coo…
Laser-cooled ytterbium ion frequency standard
S. Mulholland, H. A. Klein, G. P. Barwood +6
We report on the development of a trapped-ion, microwave frequency standard based on the 12.6 GHz hyperfine transition in laser-cooled ytterbium-171 ions. The entire system fits in…
Measurement of differential polarizabilities at a mid-infrared wavelength in
C F A Baynham, E A Curtis, R M Godun +10
An atom exposed to an electric field will experience Stark shifts of its internal energy levels, proportional to their polarizabilities. In optical frequency metrology, the Stark s…
Absolute frequency measurement of the SF optical clock transition in Yb with an uncertainty of using a frequency link to International Atomic Time
Charles F. A. Baynham, Rachel M. Godun, Jonathan M. Jones +8
The highly forbidden SF electric octupole transition in Yb is a potential candidate for a redefinition of the SI second. We present a…
A High-Performance, Low-Cost Laser Shutter using a Piezoelectric Cantilever Actuator
W. Bowden, I. R. Hill, P. E. G. Baird +1
We report the design and characterization of an optical shutter based on a piezoelectric cantilever. Compared to conventional electro-magnetic shutters, the device is intrinsically…
Modified hyper-Ramsey methods for the elimination of probe shifts in optical clocks
R. Hobson, W. Bowden, S. A. King +3
We develop a method of modified hyper-Ramsey spectroscopy in optical clocks, achieving complete immunity to the frequency shifts induced by the probing fields themselves. Using par…
Measurement of the 1s-2s energy interval in muonium
V. Meyer, S. N. Bagayev, P. E. G. Baird +26
The 1s-2s interval has been measured in the muonium ({}) atom by Doppler-free two-photon laser spectroscopy. The frequency separation of the states was determined to be 2 4…