Optical signal detection apparatus and method for preventing...

H - Electricity – 04 – R

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H04R 1/44 (2006.01) G01H 9/00 (2006.01) G02F 1/125 (2006.01)

Patent

CA 2121880

A photodetector includes a polarizer array and an array of photodetector elements. The polarizer array includes a plurality of polarizers having axes of polarization spaced apart by selected angles such that each optical signal incident on the polarizer array has a polarization component along at least one of the axes of polarization. The array of photodetector elements is arranged such that each of the photodetector elements receives light from a selected one of the polarizers. At least one of the photodetector elements receives parallel polarization components from the optical signals to form an electrical signal indicative of interference between the optical signals.

L'invention est un photodétecteur comportant un réseau de polariseurs et un réseau d'éléments photodétecteurs. Ces polariseurs ont des axes de polarisation à espacements angulaires choisis de façon à ce que chacun des signaux lumineux incidents sur le réseau de polariseurs ait une composante de polarisation parallèle à l'un des axes de polarisation au moins. Le réseau d'éléments photodétecteurs est monté de façon que chacun de ces éléments reçoive la lumière transmise par un polariseur sélectionné. L'un des éléments photodétecteurs au moins reçoit les composantes de polarisation horizontales des signaux lumineux pour produire un signal électrique représentatif du brouillage entre les signaux lumineux.

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