Using current techniques the power of a laser is limited because of the
damage intense power can cause to the optical elements in the laser. In a
new paper a method has been found to overcome this limitation by making the
optical elements, not out of glass or diamond or sapphire but, out of
plasma; a laser built using this technique could produce laser pulses with
power a million times more intense than anything we have today and well
into the Exawatt range. The authors propose building a laser with 90%
efficiency that can produce light pulses with a duration of 2.2*10^-14
seconds with the power of one Exawatt. The power generating capacity of the
entire U.S. electrical grid is about one Terawatt or 10^12 watts, a Exawatt
is 1 million times greater than that or 10^18  watts.

Plasma Transmission Gratings for Compression of High-Intensity Laser Pulses
<https://journals.aps.org/prapplied/pdf/10.1103/PhysRevApplied.18.024026>

John K Clark    See what's on my new list at  Extropolis
<https://groups.google.com/g/extropolis>
upl

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