Vol. 50, Issue 4, pp. 539-549

Vol. 50 Issue 4 pp. 539-549

Efficient, low-cost optical coupling mechanism for TiO2-SiO2 sol-gel derived slab waveguide surface grating coupler sensors

Andrzej Kaźmierczak, Mateusz Słowikowski, Krystian Pavłov, Maciej Filipiak, Michael Vervaeke, Cuma Tyszkiewicz, Heidi Ottevaere, Ryszard Piramidowicz, Paweł Karasiński

Keywords

polymer microlenses, optical coupling, surface grating couplers

Abstract

We present an optical signal coupling scheme for slab waveguide surface grating coupler sensors. The proposed solution is based on the use of polymer microlenses. In this work we analyze two types of compact polymer lenses: the aspheric plano-convex lenses and Fresnel lenses. The feasibility of the proposed scheme is demonstrated by the experimental investigation into the optical signal coupling to the test structure of TiO2-SiO2 slab waveguide surface grating coupler using both types of lenses.

Vol. 50
Issue 4
Article No: 03
pp. 539-549

2.02 MB
OPTICA APPLICATA - a quarterly of the Wrocław University of Science and Technology, Faculty of Fundamental Problems of Technology