[time-nuts] Germany sends optical-clock signal over nearly 1000 km

[Magnus Danielson]

On 04/28/2012 02:36 AM, Hal Murray wrote:
>
> http://tinyurl.com/6of34oq
> http://physicsworld.com/cws/article/news/2012/apr/26/germany-sends-optical-clo
> ck-signal-over-nearly-1000-km
>
> Physicists in Germany have sent a burst of light over a distance of 920 km
> down an optical fibre -- with its frequency remaining stable to the 19th
> decimal place. As well as supporting the development of highly accurate
> "optical clocks", the breakthrough could also be used in a range of
> commercial and scientific applications including precision spectroscopy,
> geodesy and very-long-baseline astronomy.
>

It would also render the article on time-transfer limits useless, which 
I already thought, as the fibre transfer methods being referred to 
certainly did not match up well with what should be possible to achieve.

Cheers,
Magnus