Gallmann L, Sutter D H, Matuschek N, Steinmeyer G, Keller U, Iaconis C, Walmsley I A
Opt Lett. 1999 Sep 15;24(18):1314-6. doi: 10.1364/ol.24.001314.
We demonstrate spectral phase interferometry for direct electric-field reconstruction (SPIDER) as a novel method to characterize sub-6-fs pulses with nanojoule pulse energy. SPIDER reconstructs pulse phase and amplitude from a measurement of only two optical spectra by use of a fast noniterative algorithm. SPIDER is well suited to the measurement of ultrabroadband pulses because it is quite insensitive to crystal phase-matching bandwidth and to unknown detector spectral responsivity. Moreover, it combines highly accurate pulse-shape measurement with the potential for online laser system diagnostics at video refresh rates.
