Another problem posed by X-ray lasers is that of focusing them.

We are still being fired upon, probably by X-ray lasers.

Over the years, the X-ray laser has become a low-level research effort.

The debate over the X-ray laser has intensified over the last two years.

These were, it turned out, a pair of high-power X-ray lasers.

A continuous-firing X-ray laser would be easy enough to make.

If there's an X-ray laser involved, I'll tell you so.

Battle steel was no match for that tsunami of X-ray lasers.

"The X-ray laser is a fundamental, new and wonderful discovery with possible applications in defense."

The researchers constructed the equivalent of a dusty mirror for their soft X-ray laser.