Novel extraction algorithm for amplitude and phase measurement of   ultrashort optical pulses via spectral phase interferometry
  We present a novel extraction algorithm for spectral phase interferometry for direct field reconstruction (SPIDER) for the so-called X-SPIDER configuration. Our approach largely extends the measurable time windows of pulses without requiring any modification to the experimental X-SPIDER set-up. 
Alessia Pasquazi, Marco Peccianti, Jose Azana, David J. Moss, and   Roberto Morandotti
physics.optics