  We report time-resolved pulse self-steepening and temporal splitting in flint
glass (SF11) in single-shot using broadband frequency-domain streak camera
(B-FDSC). The broadband ($60$ nm) probe beam generated through a compact
coverslip array provides $\sim 40$ fs temporal resolution. The experimental
results support the theoretical model of pulse self-steepening and indicate
that multiphoton ionization (MPI) initiates the pulse splitting process in
glass. We perform a three-dimensional simulation to verify the experimental
results.
