Slide 1

Summary

Slide 3

Attosecond pulse train by HHG

Slide 5

Shorter fs-pulse to get a single atto-pulse

Slide 7

1) Polarization gating method

Slide 9

Slide 10

Pulse compression by - GVD

Experimental setup
Generation of a few cycle pulses

Previous work and Limitations

Limitations

Our approach

Reducing self focusing

Preserving self phase modulation

Reducing self defocusing

Reducing self defocusing

Combined effects : SF and SDF

Measured spatial profiles

Throughput energy in vacuum

Scaling up energy by circular polarization

Scaling up energy by circular polarization

Broader spectrum for circular input

Measurement of the pulses
FROG- Experimental setup

Measurement of pulses
measured FROG traces

Measurement of input pulses

Measurement of input pulses

Measurement of output pulses

Measurement of output pulses

Results

Further possibilities