As one important part of seismic data acquisition system, on-site digital recording system not only can monitor and process field seismic data in time but also can control recording quality.

We report, for the first time, a specially designed set-up of pulsed digital holography for micro - recording of air-ionization process induced by femto-laser.

In this paper, we report a pulsed digital micro-holography system for recording ultra-fast process of the order of femto-second.