Thanks for attempting a real response this time, but after the laser was turned on, the front spacecraft would accelerate away from the following spacecraft. The laser’s ability to slow down the following spacecraft would continually diminish over time.
It wouldn't take long, so it would work; the other method from then was to make the leading probe a big mirror on one side -- it would turn and the big-assed laser in orbit around our Sun would shoot the beam, which would reflect against the trailing probe. But of course, none of this has been demostrated.