Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS)

Progress at CSIRO Australia towards a microwave frequency standard based on trapped, laser-cooled /sup 171/Yb/sup +/ ions

Peter Fisk, M.A. Lawn, C. Coles

Published Dec 30, 2002• 1 citation
Publisher

Abstract

The authors report preliminary results of precision microwave-optical double resonance spectroscopy on buffer gas cooled /sup 171/Yb/sup +/ ions confined in a linear Paul trap as a microwave frequency standard at 12.6 GHz. They also report laser cooling of trapped /sup 171/Yb/sup +/ ions. Temperatures below 1 K have been achieved, and evidence for a phase transition to a crystal-like state has been found. This temperature is sufficiently low to reduce the fractional second-order Doppler shift of the microwave resonance to below 10/sup -14/.>

DOI
10.1109/freq.1993.367389

Related papers

Very high Q microwave spectroscopy on trapped /sup 171/Yb/sup +/ ions: application as a frequency standard

Peter Fisk, Matthew J. Sellars, M.A. Lawn +3 more

A microwave frequency standard based on buffer-gas cooled /sup 171/Yb/sup +/ ions confined in a linear Paul trap has been demonstrated in prototype form. The standard exhibits a fractional frequency instability characterized by an Allan deviation /spl sigma//sub y/(/spl tau/)=3.7/spl times/10/sup -13//spl tau//sup -1/2/ for /spl tau/>

IEEE Transactions on Instrumentation and Measurement•Apr 1, 1995•45 citations

Performance of a prototype microwave frequency standard based on trapped /sup 171/Yb/sup +/ ions

Peter Fisk, Matthew J. Sellars, M.A. Lawn +3 more

A microwave frequency standard based on buffer-gas cooled /sup 171/Yb/sup +/ ions confined in a linear Paul trap has been demonstrated in prototype form. The standard exhibits a fractional Allan deviation /spl sigma//sub y/(/spl tau/)=3.7/spl times/10/sup -13/ /spl tau//sup -1/2/ for /spl tau/>

Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS)•Dec 17, 2002•5 citations

Laser-microwave double resonance frequency standard using {sup 199}Hg{sup +} ions in a cryogenic linear trap

Martin E. Poitzsch, Jonas Bergquist, W. M. Itano +1 more

We have previously reported experiments using a linear rf trap to store laser-cooled {sup 199}Hg{sup +} ions. Trapping multiple ions increases the signal-to-noise ratio; yet all ions have equally low second-order Doppler shifts if they are confined along the nodal center line of a linear trap. In such an environment, the 40.5 GHz ground-state hyperfine transition in {sup 199}Hg{sup +} is a candidate for an extremely accurate and stable microwave frequency standard. Our redesigned apparatus will operate at cryogenic temperatures to provide very low background gas pressure (resulting in longer ion storage times and immunity from background pressure shifts) and superconductive shielding against stray magnetic fields. We shall discuss progress on this frequency standard and applications of our apparatus to new cooling and squeezing techniques.

Bulletin of the American Physical Society•May 1, 1993•0 citations

Very-high Q microwave resonances in trapped /sup 171/Yb/sup +/ ions: application as a microwave frequency standard

Peter Fisk, M.A. Lawn, C. Coles +2 more

The 12.6 GHz microwave resonance in /sup 171/Yb/sup +/ ions confined in a linear Paul trap is interrogated using a cryogenic sapphire resonator-based microwave source. Line Q factors of up to 1.1/spl times/10/sup 13/ have been observed. We report on the performance of the ion trap-sapphire resonator system as a prototype 12.6 GHz frequency standard.>

Conference on Precision Electromagnetic Measurements•Dec 17, 2002•0 citations

Optical frequency standard investigations on trapped /sup 171/Yb/sup +/

Chr. Tamm, D. Engelke

Summary form only given, as follows.Single /sup 171/Yb ions are laser cooled in a Paul trap, using laser sources based on semiconductor diode lasers. Excitation of the potential frequency-standard reference transition to the /sup 2/D/sub 3/2/, (F=2) hyperfine sublevel of /sup 171/Yb/sup +/ at a wavelength of 435.5 nm is demonstrated.

Conference on Precision Electromagnetic Measurements•Dec 24, 2002•0 citations

A microwave frequency standard based on laser-cooled /sup 171/Yb/sup +/ ions

Richard B. Warrington, Peter Fisk, Michael J. Wouters +1 more

We report operation of a microwave frequency standard based on the 12.6 GHz ground-state hyperfine transition in a cloud of laser-cooled /sup 171/Yb/sup +/ ions. The projected performance of this standard (frequency uncertainty /spl les/ 4 /spl times/ 10/sup -15/ and stability 5 /spl times/ 10/sup -14/ /spl tau//sup -1/2/ for a 10 s Ramsey time) is comparable to that of a cesium fountain.

Conference on Precision Electromagnetic Measurements•Jun 25, 2003•0 citations
The authors report preliminary results of precision microwave-optical double resonance spectroscopy on buffer gas cooled /sup 171/Yb/sup +/ ions confined in a linear Paul trap as a microwave frequency standard at 12.6 GHz. They also report laser cooling of trapped /sup 171/Yb/sup +/ ions. Temperatures below 1 K have been achieved, and evidence for a phase transition to a crystal-like state has been found. This temperature is sufficiently low to reduce the fractional second-order Doppler shift of the microwave resonance to below 10/sup -14/.>
We have previously reported experiments using a linear rf trap to store laser-cooled {sup 199}Hg{sup +} ions. Trapping multiple ions increases the signal-to-noise ratio; yet all ions have equally low second-order Doppler shifts if they are confined along the nodal center line of a linear trap. In such an environment, the 40.5 GHz ground-state hyperfine transition in {sup 199}Hg{sup +} is a candidate for an extremely accurate and stable microwave frequency standard. Our redesigned apparatus will operate at cryogenic temperatures to provide very low background gas pressure (resulting in longer ion storage times and immunity from background pressure shifts) and superconductive shielding against stray magnetic fields. We shall discuss progress on this frequency standard and applications of our apparatus to new cooling and squeezing techniques.