Laser apparatus and methods involving multiple amplified outputs are
disclosed. A laser apparatus may include a master oscillator, a beam
splitter coupled to the master oscillator, and two or more output heads
optically coupled to the beam splitter. The beam splitter divides a
signal from the master oscillator into two or more sub-signals. Each
output head receives one of the two or more sub-signals. Each output head
includes coupling optics optically coupled to the beam splitter. An
optical power amplifier is optically coupled between the beam splitter
and the coupling optics. Optical outputs from the two or more output
heads do not spatially overlap at a target. The master oscillator signal
may be pulsed so that optical outputs of the output heads are pulsed and
substantially synchronous with each other.