Laserbasierte Datenübertragung der NASA demonstriert funktionierendes Internet 290 Millionen Meilen von der Erde entfernt

Idk how they are doing it, but using polarization filters you could just send 1 beam with different sections of polarized light waves to represent the 0s and 1s in data, assuming you can equip a way to make sure the receiver is in the right orientation when the beam arrives.