One-dimensional to two-dimensional channel formatting with micro-optics for wavelength division multiplexing networks.
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 dB. However, the experimental loss is 10 dB. The difference is due to the poor quality of the diffraction gratings. Nevertheless, the formatting operation was performed successfully.
Ménard
Michaël
M
Photonics Systems Group, Department of Electrical and Computer Engineering, McGill University, 3480 University Street, Montréal, Québec H3A 2A7, Canada. mikem@photonics.ece.mcgill.ca
Thomas-Dupuis
Frédéric
F
Kirk
Andrew G
AG