Assuming they are concerned with LEO targets, why not just transmit a focused microwave pulse from a ground station and fry the electronics?
If this were America we were talking about I could answer my own question... Billions to defense contractors for an orbital ASAT capability someday (maybe) or millions for a more reliable but boring solution we could have next week. No contest, we propose the billion dollar "machine guns in space!" solution.
It seems easier for the US military to get approval for expensive spectacular boondoggles than for sane solutions that may actually work... B-2, LCAC or F35 for recent examples. Maybe the French have the same issue or maybe I'm just projecting my own nation's issues on to another?