From an intense femtosecond laser pulse to a strongly deformed white-light laser

Petit, S.; Talebpour, A.; Proulx, A.; Yang, J.; Chin, S. L.
July 2000
AIP Conference Proceedings;2000, Vol. 525 Issue 1, p632
Academic Journal
We present some results concerning the propagation of intense femtosecond Ti:sapphire laser pulses in matter and especially in air. We show that the supercontinuum created during the propagation preserves the spectral coherence of the initial pulse and both together form a chirped-white light laser. Furthermore, we detected the photoemission of N[sub 2] and N[sub 2][sup +] to measure the intensity dependence of a focused laser pulse in air along the propagation distance and we observed a multiple refocusing. Finally, we underlined a clear charge separation in the plasma created a focused pulse in air giving rise to a short electric pulse. © 2000 American Institute of Physics.


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