An example laser system includes a laser, a plurality of pulse stretchers coupled together in series, a pulse amplifier, a feedback module, and a lens assembly. The plurality of pulse stretchers is configured to stretch pulse widths of the laser pulses and output stretched laser pulses. The pulse amplifier is positioned between a first pulse stretcher and a second pulse stretch of the plurality of pulse stretchers, and is configured to amplify the laser pulses. The feedback module includes a pulse delay comparator configured to compare a first laser pulse of the laser pulses to a corresponding first stretched laser pulse of the stretched laser pulses. The feedback module also includes a computing device configured to determine an adjustment to a pulse stretcher of the plurality of pulse stretchers, and apply the adjustment to the pulse stretcher so as to modify a shape of a second stretched laser pulse.