Optical frequency standards and measurements
{We describe the performance characteristics and frequency measurements of two high-accuracy high-stability laser-cooled atomic frequency standards. One is a 657-nm (456-THz) reference using magneto-optically trapped Ca atoms, and the other is a 282-mn (1064-TRz) reference based on a single Hg+ ion confined in an RF-Paul trap. A femtosecond mode-locked laser combined with a nonlinear microstructure fiber produces a broad and stable comb of optical modes that is used to measure the frequencies of the reference lasers locked to the atomic standards. The measurement system is referenced to the primary frequency standard NIST F-1, a Cs atomic fountain clock. Both optical standards demonstrate exceptional short-term instability (approximate to5 x 10(-15) at 1 s), as well as excellent reproducibility over time. In light of our expectations for the future of optical frequency standards, we consider the present performance of the femtosecond optical frequency comb, along with its limitations and future requirements.}
Duke Scholars
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Related Subject Headings
- Optoelectronics & Photonics
- 0912 Materials Engineering
- 0906 Electrical and Electronic Engineering
- 0205 Optical Physics
Citation
Published In
ISSN
Volume
Issue
Start / End Page
Location
Publisher
Related Subject Headings
- Optoelectronics & Photonics
- 0912 Materials Engineering
- 0906 Electrical and Electronic Engineering
- 0205 Optical Physics