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Graduate Student Seminar - 04/26/2013

"Femtosecond Laser Filamentation in Air"

by Eric Rosenthal

Friday, April 26, 2013 -- 12:00 p.m.
Large Conference Room, 1207 Energy Research Facility

Advisor:  Professor Howard Milchberg

A sufficiently intense laser beam propagating in air will experience a host of nonlinear effects. Among these effects are self-focusing of the beam and ionization of the medium leading to plasma generation. In our laboratory we routinely generate optical pulses of peak power ~1012 Watts. Upon propagation in the air, these pulses experience a nonlinear interaction that can cause the beam to remain focused for many Rayleigh lengths. This regime of laser pulse propagation is called "filamentation." The underlying mechanisms that drive the formation of filaments and filamentary propagation will be discussed, along with details and results from recent experiments aimed at exploiting our understanding of the air nonlinearity.

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

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