Hannover 2010 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 61: Ultrashort Laser Pulses: Applications IV

Q 61.4: Vortrag

Freitag, 12. März 2010, 11:15–11:30, F 342

Self-diffraction SPIDER — •Simon Birkholz, Sebastian Koke, Jens Bethge, Christian Grebing, and Günter Steinmeyer — Max Born Institute, Berlin, Germany

We discuss a novel variant of spectral phase interferometry for direct electric field reconstruction (SPIDER). This SPIDER variant relies on the χ⁽³⁾-process of self-diffraction (SD), which allows for octave-spanning phase-matching. With three photons on the input side of a χ⁽³⁾-process, there are actually two different versions of SD-SPIDER possible: one with two short pulse input photons and one with only one. In both cases, the SPIDER-signals are spectrally collocated with the input pulse. We experimentally demonstrated both of these possible SD-SPIDER variants, using a 500 µm BaF₂-crystal. Using pulses from a 400 nm white-light continuum, we measure a pulse duration of 8.2 fs. Finally, we discuss pros and cons of both novel SPIDER variants.