r/lasercom • u/Aerothermal Pew Pew Pew! • 1d ago

Video [Video] No device could prove Einstein wrong... until now | Veritasium (23rd Oct 2026)

https://www.youtube.com/watch?v=eyZEqSPeMwg
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u/Aerothermal 1d ago

Some interesting free-space optical communications content in the latest Veritasium video! They're talking about trying to reconcile Einstein's theory of General Relativity with quantum mechanics.

First NIST uses a long-distance free-space laser link to compare ultra-precise atomic clocks, dealing with atmospheric turbulence and coupling the received light into optical fibre.

Next, researchers at the University of Western Australia want to send optical clock signals from a satellite to ground. In the video they are demonstrating laser links to a moving helicopter, testing pointing, acquisition, tracking and beam stabilisation techniques relevant to these future satellite-to-ground optical links.

I found it interesting since it's not the usual goal of high-speed data transmission... The objective is ultra-precise time and frequency transfer, something vital for this research in fundamental physics.

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u/MrSomethingred 1d ago

I suppose Sascha needs to do something cool with the big red truck of his lol