Photobleached refractive index tapers in electrooptic polymer rib waveguides |
| |
| Authors: | K. Geary Seong-Ku Kim Byoung-Joon Seo Yu-Chueh Hung Wei Yuan H.R. Fetterman |
| |
| Affiliation: | Dept. of Electr. Eng., Univ. of California, Los Angeles, CA, USA; |
| |
| Abstract: | Photobleached refractive index tapers in electrooptic polymer rib waveguides, which act as two-dimensional optical mode transformers, are investigated. One taper method involves a discrete step mask-shifting scheme with a fixed intensity UV light source. A second method utilizes a gray-scale mask to precisely control the intensity of UV light reaching each portion of the taper. Using a gray-scale mask, adiabatic refractive index tapers can be inscribed into electrooptic polymer waveguides in a single fabrication step with no scanning parts. Optimized taper profiles are derived and applications for their incorporation into passive-to-active waveguide transitions are described. |
| |
| Keywords: | |
|
|
