Generation of hollow beams by spiral rays in multimode light guides.
The generation of hollow beams by a multimode light guiding device is analyzed. The light propagation through the light guide is simulated by ray tracing. It is shown that hollow beams are generated by light rays that propagate along a spiral path through the light guide. The properties of the hollow beam depend on the tilt angle and location of the input beam on the front surface of the light guide. The properties of the output beam are investigated experimentally.
Schweiger
Gustav
G
Department of Mechanical Engineering, Laser Applications Technology, Ruhr-University Bochum, Universitätsstr. 150, D-44780 Bochum, Germany. schweiger@lat.rub.de
Nett
Ralf
R
Ozel
Bilal
B
Weigel
Thomas
T