[time-nuts] Optical Cesium or maybe Cesium "light"!
phk at phk.freebsd.dk
Sat Mar 18 15:27:04 EDT 2017
In message <7765b488-bc22-d5af-3f62-d356e4aacff9 at karlquist.com>, "Richard (Rick
) Karlquist" writes:
>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.
You could build one with two beams running opposite directions and still
using the same laser light and RF field, but it would be more complicated.
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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