Infrared generation by filamentation in air of a spectrally shaped laser beam.


We demonstrated the generation of infrared radiation by filamentation of a spectrally shaped femtosecond laser beam. The spectrum is divided in two distinctive parts using an acousto-optic programmable dispersive filter (AOPDF) as a pulse shaper, resulting in two pulses of different colors. One pulse is frequency doubled and the beams are then focused to… (More)
DOI: 10.1364/OE.19.014093


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