Determination of weak optical pulses in amplitude and phase by measurement of the transient polarization state

Ultrashort single-shot pulse characterization with high spatial resolution using localized nonlinearities in ferroelectric domain walls

Second-order nonlinearities localized in the regions adjacent to the ferroelectric domain wall in KTiOPO(4) are used to realize a single-shot noncollinear frequency-resolved optical gating arrangement for ultrashort pulse characterization with high spatial resolution. Cerenkov phase matching is utilized to achieve spectral dispersion and makes the same nonlinear crystal applicable over wide spectral ranges from the visible to the mid-infrared.

Characterization of arbitrarily polarized ultrashort laser pulses by cross-phase modulation

We propose a technique for time resolution of the polarization state of ultrashort light pulses that also provides the overall time-varying phase of the pulse. This method is based on a spectral polarimetric analysis of the pulse after propagation through a Kerr medium. The feasibility of this method is demonstrated both numerically and experimentally.