  We consider synchronized trains of sub-picosecond pulses generated by
mode-locked lasers applied to deflection of near Earth objects (NEO) on
collision course with Earth. Our method is designed to avoid a predicted
collision of the NEO with Earth by at least the diameter of Earth. We estimate
deflecting a 10,000 MT NEO, such as the asteroid which struck Earth near
Chelyabinsk, Russia to be feasible within several months using average power in
the ten kilowatt range. We see this deflection method as scalable to larger NEO
to a degree not possible using continuous laser systems.
