Abstract

We present a method of interfacing a conventional wavelength multiplexing and demultiplexing device with a two-dimensional (2-D) array of surface-active elements, such as micro-electromechanical system devices or photodetectors. We use diffractive optical elements to transform wavelength division multiplexed signals spread along a line into a 2-D array. We applied this technique to build a device that is compatible with an arrayed-waveguide grating. The theoretical insertion loss predicted by combining beam propagation and rigorous coupled-wave analysis is $2.75\mathrm{dB}$. However, the experimental loss is $10\mathrm{dB}$. The difference is due to the poor quality of the diffraction gratings. Nevertheless, the formatting operation was performed successfully.

© 2006 Optical Society of America

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