Progress on a Portable Rubidium Fountain Frequency Standard
NATIONAL INST OF STANDARDS AND TECHNOLOGY BOULDER CO TIME AND FREQUENCY DIV
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We are developing a simple and transportable laser-cooled rubidium Rb atomic fountain frequency standard. The optical package for this system uses DFB distributed feedback diode lasers and a frequency offset locking scheme to generate the optical frequencies needed for laser-cooling, launching, post-cooling, and detection of Rb atoms. This atomic fountain will be useful as a transfer standard and secondary standard for calibrating nontransportable frequency standards, as well as a measurement tool for the gravitational redshift. Here, we describe the progress made on this project, including our recent observation of a magnetooptical trap MOT, and the anticipated performance of our transportable Rb fountain frequency standard.
- Lasers and Masers
- Test Facilities, Equipment and Methods
- Electricity and Magnetism