On Thu, 3 Nov 2016 17:38:23 +1100 Michael Wouters <michaeljwout...@gmail.com> wrote:
> > If i were able to build a working optical clock, i would just buy > > a frequency comb. The 10k€ for a comb would be cheap compared to the > > money spend on the rest of the clock :-) > > Hmm, not sure what you're looking at, but I have a commercial erbium > fibre comb in my lab and it cost 250 000 Euro. There are two full > height 19 inch racks full of electronics. It has an extra output for > 1000 to 2000 nm though, so you could probably knock 50K off the price > for that. Interesting.... The 10k was the price I was told, when I asked a couple of stupid questions at last EFTF. But maybe those weren't octave spanning combs, which would be required for such an application. > Another interesting data point: some people I know in a national > measurement lab built and sold a Cs fountain to another lab. The price > was US 2 million and I'm guessing that was "mates' rates". I would guess so too. 2 mio sounds rather cheap for such a device and considering that all parts are hand made and assembled by expensive grad students and even more expensive senior researchers. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation. -- Miss Matheson, The Diamond Age, Neil Stephenson _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.