Attosecond Light Pulse Source, the research infrastructure of few-cycle phase controlled light waves

To obtain short duration electromagnetic signals, the carrier frequency of the waves has to be increased. The first few cycle electromagnetic waves in the optical domain, that is laser pulses lasting less than 10 fs, were generated in the late 80s´. At the turn of the century, a train of attosecond pulses was first demonstrated, now in the soft X-ray regime.