Optical calibration system and method

G - Physics – 02 – F

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G02F 1/1362 (2006.01) H04J 14/02 (2006.01)

Patent

CA 2586586

In an optical system including an optical input port for projecting an input optical signal onto an optical phased matrix array, an optical phased matrix array including a plurality of individually addressable pixels thereon, each said pixel being drivable within a prescribed range of levels, and an optical output port for collecting a predetermined fraction of said optical signal received from said optical phased matrix array; a method of compensating for phase distortions including the steps of: (a) determining a plurality of transfer functions relating said level of each said pixel to the phase variation each said pixel introduces to light from said input optical signal which is incident thereon; and (b) controlling the level of selected ones of said pixels in accordance with a corresponding transfer function such that said fractional signal received at said output port is modified in phase to substantially compensate for optical phase distortions arising from said optical phased matrix array.

Dans un système optique comprenant un port d'entrée optique destiné à projeter un signal optique d'entrée sur un réseau matriciel à commande de phase optique, un réseau matriciel à commande de phase optique comprenant une pluralité de pixels individuellement adressables sur celui-ci, chacun de ces pixels pouvant être attaqués dans une gamme prescrite de niveau, et un port de sortie optique destiné à collecter une fraction prédéterminée du signal optique reçu du réseau matriciel à commande de phase optique, un procédé de compensation de distorsions de phase comprenant les étapes suivantes:(a) détermination d'une pluralité de fonctions de transfert reliant le niveau de chaque pixel à la variation de phase, chaque pixel introduisant la lumière à partir du signal optique d'entrée qui est incidente sur celui-ci et, (b) commande du niveau des pixels sélectionnés conformément à la fonction de transfert correspondante de sorte que le signal fractionnel reçu à ce port de sortie soit modifié en phase de façon à sensiblement compenser des distorsions de phase optique survenant du réseau matriciel à commande de phase optique.

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