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Graduate Student Seminar - 9/20/2013

"The Effect of Gas Dynamics on Femtosecond Filamentation"

by Nihal Jhajj

Friday, September 20, 2013 -- 12:00 p.m.
Large Conference Room (1207), Energy Research Facility

Advisor: Professor Howard Milchberg

Femtosecond filamentation is a nonlinear optical process in which an intense, ultrashort laser pulse can remain tightly focused over many Rayleigh lengths. A string of plasma is left in the wake of the filament which eventually recombines, depositing heat into the air and driving gas dynamics. Up until recently, the effects of millisecond timescale gas dynamics on pulsed femtosecond lasers undergoing filamentation had been ignored. This talk will provide an introduction to femtosecond filamentation and an explanation of the longer timescale gas effects. Potential applications which exploit these gas dynamics will also be discussed.

For additional information about the IREAP Graduate Student Seminars, contact David Meichle at dmeichle at

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