Light-receiving element array and optical demultiflexer...

G - Physics – 01 – J

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G01J 3/36 (2006.01) G01J 3/28 (2006.01) H04B 10/08 (2006.01) G02B 6/34 (2006.01)

Patent

CA 2354267

An optical branching filter by which signals and noises of respective channels of wavelength-multiplexed lights are clearly separated from each other. The optical branching filter has a photodetector array comprising photodetectors receiving branched lights which are separated from a wavelength-multiplexed light in accordance with respective wavelengths and arranged linearly. The photodetector array has a plurality of photodetectors for signal monitoring and a plurality of photodetectors for noise monitoring. The signal monitoring photodetectors and the noise monitoring photodetectors are alternately arranged linearly in the direction of the arrangement of the branched lights.

Un filtre de séparation optique permet de séparer distinctement les signaux et les bruits de canaux respectifs de lumières multiplexées en longueur d'onde. Le filtre de séparation optique comprend un réseau de photodétecteurs formé de photodétecteurs qui reçoivent des lumières dérivées elles-mêmes séparées d'une lumière multiplexée en longueur d'onde conformément à des longueurs d'onde respectives et disposées en ligne. Le réseau de photodétecteurs comprend une pluralité de photodétecteurs assurant la surveillance du signal et une pluralité de photodétecteurs assurant la surveillance du bruit. Les photodétecteurs surveillant le signal et les photodétecteurs surveillant le bruit sont disposés de manière alternée et linéaire dans le sens de la disposition des lumières séparées.

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