Not a new treatment, but an article in the NY Times today. The following from " Nuclear News:"

"Mr. Monetta of Global Laser Enrichment, the General Electric-Hitachi subsidiary, said the envisioned plant would enrich enough uranium annually to fuel up to 60 large reactors. In thoery, that could power more than 42 million homes- about a third of all housing units in the United Ctates."
"The laser advance, hr added, will promote energy security "since it is a domestic source."

Because the method is simpler and more efficient than the old centrifugation, some critics warned of the proliferation of clandestine plants aimed at producing nuclear weapons.

(This technology, like any other, cannot be held secret, since there are capable people everywhere; it is the lack of industrial engineering capability that keeps less advanced technical societies from reproducing it.)