On 9/5/2025 1:26 PM, John Clark wrote:
*Today fiber optic cables are made of thousands of hair thin fiber
threads made of solid glass, the average one loses about half their
light every 15 km, 20 km for the very best. A start-up company called
"Lumenisity", which Microsoft bought in 2022, has invented a new type
of tiny optical fiber that is not hollow but has a much more complex
interior structure made of a series of even smaller concentric
cylinders. The cross section looks like this: *
image.png
*This new design only loses half its light every 33 km, can transmit
1000 times more power than a solid fiber, has a wide frequency range,
and perhaps most important of all can transmit a signal 45% faster
than a solid glass fiber. *
That's hard to believe. Optic fibers have an index of refraction of
1.44 to 1.50; so 1.45 times as fast is roughly c.
*Microsoft believes it can mass produce this fiber at a competitive
price. *
*
*
*It's interesting, Microsoft had a reputation of being a stodgy old
company and Apple the fast-moving creative one, *
They were creative in personal phones. I never saw their computers as
particularly creative.
Brent
*3nn*
4g2
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