[time-nuts] Optical Cesium or maybe Cesium "light"!

Richard (Rick) Karlquist richard at karlquist.com
Sat Mar 18 12:32:24 EDT 2017

On 3/18/2017 3:13 AM, Magnus Danielson wrote:
> The NIST-7 was a optically pumped cesium beam, and a pre-cursor to the
> fountain clocks. There should be a bunch of papers on it.

> I am however somewhat wondering about if we will see this coming out of
> Oscilloquartz. We will see.

NIST-7 has a reversible beam, which cancels out end to end phase
error in the CBT.  That works in terms of being a frequency standard,
but not for a clock, because you don't have continuous operation.
NIST-7 is also much longer than the 5071A or the Oscilloquartz offering.
So they are not really comparable beyond sharing optical pumping.


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