60 ms cross-continent
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.
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.
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