Abstract
Spectral shearing interferometry provides direct complete real-time information on ultra-short optical signals. Approaches like SPIDER (Spectral Phase Interferometry for Direct Electric field Reconstruction) [1] or SPIRIT (SPectral Interferometry Resolved In Time) [2] rely on the interference of two spectrally sheared pulses. SPIRIT is a passive and self-referenced characterization technique that has shown to be suited to a variety of pulse and experimental conditions. Wideband SPIRIT represents its novel configuration aimed at the measurement of few optical cycle pulses. As shown in this communication, ultra-short pulses of 8 fs and with a low energy (i.e. 0.25 nJ) can be characterized by means of this method.
© 2011 Optical Society of America
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