In this paper, we present a method to design a focusing double grating coupler (FDGC), which couples a polychromatic wave out of a waveguide and focuses it with only a negligible angular dispersion. The aim of the design is to construct two grating functions in such a way that the chromatic dispersions of the two gratings will compensate each other mutually. To achieve that, we use an iterative method, where the main idea is to design a double grating which deflects and focuses with no dispersion two different wavelengths resulting in negligible dispersion inside the band. The FDGC described in this paper can be applicable to many devices. In particular, the FDGC provides an attractive solution to be used in various applications of integrated optics, as well as in optical parallel computing. In addition, it can be implemented within a wide variety of applications such as a CD player, optical mass storage devices or any other application that incorporates a solid state laser and a focusing lens.

Date Published: 22 September 1997
PDF: 12 pages
Proc. SPIE 3110, 10th Meeting on Optical Engineering in Israel, (22 September 1997); doi: 10.1117/12.281402

Published in SPIE Proceedings Vol. 3110:
10th Meeting on Optical Engineering in Israel
Itzhak Shladov; Stanley R. Rotman, Editor(s)