Laser Fabricated Optical Elements in Polymers

Microscopic 3-D structures needed for new optical devices are often difficult to fabricate by conventional micro-fabrication techniques. Direct excimer laser ablation (basically the same process as the one used for used for laser eye surgery) can be used to fabricate such optical structures.



(a)
(b)
(c)
Excimer laser fabricated (a) waveguide undercut and (b) diffraction grating for input/output coupling to polymer optical waveguides.  (c) A laser-fabricated vortex lens with applications for optical image processing, high density optical data storage and optical fabrication of nano-scale structures.