TITLE:

Computation and Modeling of Electromagnetic Wave Propagation in the Highly Non-Linear Regime

DATE:

Friday, October 20th, 2017

TIME:

3:30 PM

LOCATION:

GMCS-314

SPEAKER:

Drs. Brittany Lynn and Pei-Fang Wang, SPAWAR Systems Center Pacific.

ABSTRACT:

Major technological advances have been made in the last decade in pulsed lasers.
Lasers with tens of femtosecond pulse duration have been commercialized in relatively
ruggedized single enclosure systems capable of producing watts of average power.
These energy densities on the order of GW peak powers can trigger various linear and
non-linear processes, leading to self-guided propagation and dense plasma creation in
air and condensed media. The free-electrons in these plasma regions have been shown
to reach densities up to 1016 /cm3 in sea-level atmospheric conditions and stable plasma
filaments have been created extending over 100’s of meters.

Supporting applications of these lasers with predictive models is a difficult task as
computational propagation of high power, short pulse lasers with arbitrary beam profiles
is highly complex. These types of models require high resolution of a 3-dimensional
volume propagated through time and include broadband non-linear effects of the media
with which they are interacting. Add in turbulence and statistical beam effects and
the system can quickly become computationally unwieldy. This talk will describe recent
work in simulating the Ultra Short Pulse Laser propagation and the resulting non-linear
effects, including the creation of plasma as well as various experimental laboratory results.

HOST:

Dr. Ricardo Carretero

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