Characterization of sub-6-fs optical pulses with spectral phase interferometry for direct electric-field reconstruction.
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.
Gallmann
L
L
Sutter
D H
DH
Matuschek
N
N
Steinmeyer
G
G
Keller
U
U
Iaconis
C
C
Walmsley
I A
IA