Efficient Grating Coupling to Poly-4BCMU optical waveguides

Q. Gong, G. Assanto, R. Zanoni, G. I. Stegeman, R. Burzynski, and P. Prasad

Appl. Opt. 29, 3887-3890 (1990)


We report measurements of the refractive indices of poly-4BCMU films and the fabrication of an efficient integrated optical distributed coupler. The refractive index measurements were performed in the visible and near IR using blazed-grating couplers. The analysis led to the optimization of an input coupler with a coupling efficiency larger than 45% at 1.064 Ám .