Absolutely correct. Tonnes of high density matter stuff is classified, if you do work on this in general with laser plasmas the government is gonna come and steal your work (has happened to acquaintances).

I think though the limiting factor in making a passable h-bomb is the fission warhead though, not the fusion stage. The US and other nuclear powers care about this stuff to make efficient and clean weapons rather than to just make weapons (they made them in the 50s without any lasers or plasmas).