> Has the use of x-rays for telecommuncations ever been considered? I
> imagine that x-ray photons would have more bandwidth than
> visible-spectrum photons. Other than bandwidth, are there any
> advantages to using x-rays instead of light. One major disadvantage, is
> the fact that x-rays could injure humans and possible some metal
> equipments by knocking electrons off the atoms -- one solution to this
> would be to use a lower rate of x-rays photons per second so that the
> amount of x-ray power* does not reach the danger level.
> *Power in this case define the amount of photons per second, not the
> amount of eV per photon
Currently there is no method (except for a few lab experiments in the
100+ GHz range) to modulate a source or stream of X-rays faster several
10's of GHz, and those methods are applied to IR and visible LASERs,
just fine. So it makes no sense to modulate X-rays, if high bandwidth
comm. can be achieved using lower frequency photons.