[time-nuts] Re: Optical 10 MHz source information

[Magnus Danielson]

Perry,

Just to be clear, what do you mean "optical 10 MHz sources"?

Do you talk about optical clocks?
Do you talk about optical cesiums?
Do you talk about cold rubidiums?
Do you talk about optical 10 MHz distributions?

For any new clocks, there isn't much previous experience by independent 
users to verify claims of vendors. Everyone asks for it.
I know of only one optical cesium being commercially available. I know 
of only two sources of cold rubidiums (laser-cooled) and only one of 
them is barely commercially available at the moment.
I know that some stable optical sources producing synthesized outputs, 
but not really being an commercial optical clock in the context of 
optical reference, I have yet to see something which is turn-key-ready 
on commercial basis. If you claimed to have seen that, I think you 
should name it explicitly by name so we can discuss those.

For the moment I think the cold rubidiums is the most interesting 
technique just becoming available, but yet have to become tried and 
tested to be used in continuous operations.

I have only seen projects for optical clocks that aim to tend towards 
commercial available and high availability, but I have yet to see it 
actually being commercially available and deployed.

As for optical distribution systems, which is a very different ball-park 
and does not really quantify as source.

Cheers,
Magnus

On 2024-01-22 23:58, Perry Sandeen via time-nuts wrote:
> List,
> I see that there are now two providers of optical 10 MHz souces.
> I would appreciate it if someone could give a "laymans" report on cost, MTBF, how they verify there calibration as well as if they will suppliment Cs, H-masers, etc.
> TIA
> Perry KM6FQV
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