nanog mailing list archives
Re: 60 ms cross-continent
From: Tony Finch <dot () dotat at>
Date: Sun, 21 Jun 2020 17:09:21 +0100
Mel Beckman <mel () 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: https://phys.org/news/2020-03-hollow-core-fiber-technology-mainstream-optical.html 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." Tony. -- f.anthony.n.finch <dot () 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.
Current thread:
- Re: 60 ms cross-continent, (continued)
- Re: 60 ms cross-continent Tim Durack (Jun 20)
- Re: 60 ms cross-continent Tim Durack (Jun 20)
- Re: 60 ms cross-continent Dave Cohen (Jun 20)
- Re: 60 ms cross-continent Mel Beckman (Jun 20)
- Re: 60 ms cross-continent Wayne Bouchard (Jun 20)
- Re: 60 ms cross-continent Saku Ytti (Jun 20)
- Re: 60 ms cross-continent Bryan Fields (Jun 20)
- Re: 60 ms cross-continent Martin Hannigan (Jun 20)
- Re: 60 ms cross-continent Saku Ytti (Jun 20)
- Re: 60 ms cross-continent Tim Durack (Jun 20)
- Re: 60 ms cross-continent Tim Požár (Jun 20)
- Re: 60 ms cross-continent Tim Durack (Jun 20)
- Re: 60 ms cross-continent Tony Finch (Jun 21)
- Re: 60 ms cross-continent Alejandro Acosta (Jun 20)
- Re: 60 ms cross-continent Joe Hamelin (Jun 22)
- Re: 60 ms cross-continent Rod Beck (Jun 22)
- Re: 60 ms cross-continent Carsten Bormann (Jun 20)
- Re: 60 ms cross-continent Marshall Eubanks (Jun 20)
- Re: 60 ms cross-continent Rubens Kuhl (Jun 21)
- Re: 60 ms cross-continent Brett Frankenberger (Jun 21)
- Re: 60 ms cross-continent Alejandro Acosta (Jun 21)