Lens ducts have the potential to couple the output from a laser diode
array efficiently into the gain medium of a solid-state laser in an en
d-pumped configuration. Using a ray-tracing method we investigate diff
erent design approaches of lens ducts and demonstrate the possibility
to obtain an output beam with a symmetric profile that is insensitive
to the small displacement from the output surface of a lens duct. (C)
1998 Optical Society of America.