this post was submitted on 13 Jan 2025
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[–] Deconceptualist@lemm.ee 6 points 3 months ago* (last edited 3 months ago)

It's not the laser beam itself, but more that the laser excites a material in such a way that the material can no longer be transmissive to a second beam (i.e. becomes opaque to the second wavelength).

Assuming this happens fast it could be amazing for optical switches.