The Augustana Chapter of Sigma Pi Sigma is pleased to present a public lecture:

"Switch Your Focus to Equalization -
What nonlinear optics can do for you"


Cecilia J. Vogel
Department of Physics and Astronomy, Augustana College
Tues., April 23, 2002 at 7:00 pm in Science 102

Most materials respond linearly to light passing through them, thus causing the familiar phenomenon of refraction. On the other hand the response of some materials to light is non-linear, depending on the intensity of the light rather than on the electric field strength.  Dr. Vogel will discuss how this phenomenon can be used to help keep a laser beam focused, create an optical switch, and keep multiple beams equalized in strength.

Dr. Vogel has earned a B.S. degree in physics from Michigan State University and a Ph.D. in computational nuclear physics from the University of Minnesota.  On this occasion she will be discussing research that she did with the Nonlinear Optics Group at the University of Iowa during her recent sabbatical leave.