In this work performed at TU Vienna we launched pulses from a OPA system into Kagome photonic crystal fibre. A SEA-F-SPIDER setup was built for the characterisation of these single cycle duration pulses.
cross-section of a Kagome fibre.
Experimental setup with laser source, self-comrpession stage, and characterisation via SEA-F-SPIDER
The pulse launched into the Kagome fibre undergoes self-compression. The shortest pulses measured have durations of 4.5 fs. At this wavelength ~0.8 cycles of the electric field.
Relevant Publications:
Balciunas, T., C. Fourcade-Dutin, G. Fan, T. Witting, A. A. Voronin, A. M. Zheltikov, F. Gerome, G. G. Paulus, A. Baltuska, and F. Benabid. “A Strong-Field Driver in the Single-Cycle Regime Based on Self-Compression in a Kagome Fibre.” Nature Communications 6 (January 27, 2015). doi:10.1038/ncomms7117. http://www.nature.com/ncomms/2015/150127/ncomms7117/full/ncomms7117.html