60 ms cross-continent

Tony Finch dot at dotat.at
Sun Jun 21 16:09:21 UTC 2020

Mel Beckman <mel at beckman.org> wrote:

> An intriguing development in fiber optic media is hollow core optical
> fiber, which achieves 99.7% of the speed of light in a vacuum.
> https://www.extremetech.com/computing/151498-researchers-create-fiber-network-that-operates-at-99-7-speed-of-light-smashes-speed-and-latency-records

Here's an update from 7 years after that article which hints at the
downside of hollow core fibre:


It sounds like attenuation was a big problem: "in the space of 18 months
the attenuation in data-transmitting hollow-core fibers has been reduced
by over a factor of 10, from 3.5dB/km to only 0.28 dB/km within a factor
of two of the attenuation of conventional all-glass fiber technology."

f.anthony.n.finch  <dot at dotat.at>  http://dotat.at/
Shetland Isles: Southeasterly 5 or 6, veering southerly or southwesterly 3 or
4, then backing southeasterly 5 later in southwest. Slight or moderate,
occasionally rough later in far west. Occasional rain then mainly fair, but
showers far in east. Good, occasionally moderate.

More information about the NANOG mailing list