Interesting stuff. https://www.sciencedirect.com/science/article/abs/pii/S0169809507002049
https://www.ece.mcmaster.ca/~hranilovic/woc/resources/local/spie2000b.pdf The short version of what I learned from those articles: You can play with wavelengths to get better penetration through "haze", but a proper fog doesn't care what kind of laser you have. When visibility drops to 32m (100ft) you're losing 300dB/km. I don't want to be a complete naysayer, but 300dB/km is a big hurdle. Ars Technica is calling Taara a "backbone provider", but 20Gbps is not much of a backbone. I feel like the article is missing some details because I can't believe Google would invest in what's being described here. -Adam ________________________________ From: AF <af-boun...@af.afmug.com> on behalf of Ken Hohhof <khoh...@kwom.com> Sent: Monday, March 17, 2025 2:43 PM To: 'AnimalFarm Microwave Users Group' <af@af.afmug.com> Subject: Re: [AFMUG] 20 Gbps 20 km with lasers Seems like if the beam is literally “pencil thin”, even a bird (or a drone) flying through the path would interrupt it. Or would the bird be incinerated? If you looked at it, would you be blinded? Since this is terrestrial, only very low clouds would be a problem, but what about rain? Fog? Heat distortion? From: AF <af-boun...@af.afmug.com> On Behalf Of Bill Prince Sent: Monday, March 17, 2025 1:15 PM To: af@af.afmug.com Subject: Re: [AFMUG] 20 Gbps 20 km with lasers Brings another dimension to the concept of "in the cloud". bp <part15sbs{at}gmail{dot}com> On 3/17/2025 10:25 AM, Ken Hohhof wrote: https://arstechnica.com/tech-policy/2025/03/alphabet-spins-off-laser-based-internet-backbone-provider-taara/
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