Red-green-blue laser emissions from dye-doped poly(vinyl alcohol) films.
A microscope slide acting as a passive waveguide was coated by three separate poly(vinyl alcohol) films that were doped with Coumarin 460, Disodium Fluorescein, and Rhodamine 640 perchlorate. On collinear pumping by a nitrogen laser, these dyes furnished primary red-green-blue laser emissions that were collected and waveguided by the microscope slide but exited from both ends. Frosting the waveguide exit introduced light scattering at the glass-air interface and spatially overlaid the red-green-blue laser emissions that emerged as a uniform white-light beam.
Yap
Seong-Shan
SS
Institute of Postgraduate Studies, University of Malaya, Kuala Lumpur 50603, Malaysia.
Siew
Wee-Ong
WO
Tou
Teck-Yong
TY
Ng
Seik-Weng
SW