A device and method for filtering optical wavelengths

H - Electricity – 04 – J

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Details

H04J 14/02 (2006.01) G02B 6/34 (2006.01) G02F 1/01 (2006.01) H01S 3/10 (2006.01)

Patent

CA 2370757

The present invention relates to a device and to a method for the wavelength selective filtration of optical wavelength channels. The device includes at least one 3dB-coupler or at least one Q port circulator (40), where Q>=3, a 1XN WDM-(de)multiplexer (30), where N>=2, N number of waveguides (31, 32, 33, 34, 35, 36, 37 and 38), at least N number of reflection sections (61, 62, 63, 64, 65, 66, 67 and 68) and at least N number of variable optical attenuators (71, 72, 73, 74, 75, 76, 77 and 78). One of the ports on the circulator (40) or on the 3dB-coupler is connected to a first side of the WDM-(de)multiplexer (30). Each waveguide (31, 32, 33, 34, 35, 36, 37 and 38) includes at least one variable optical attenuator (71, 72, 73, 74, 75, 76, 77 and 78) and at least one reflection section (61, 62, 63, 64, 65, 66, 67 and 68), such that at least one variable optical attenuator (71, 72, 73, 74, 75, 76, 77 and 78) will be located between a reflection section (61, 62, 63, 64, 65, 66, 67 and 68) and the WDN-(de)multiplexer (30).

La présente invention concerne un dispositif et un procédé de filtration sélective d'une longueur d'ondes de canaux de longueurs d'ondes optiques. Ce dispositif comprend au moins un coupleur 3dB ou au moins un circulateur à accès Q (40), où Q>=3, un (dé)multiplexeur MRL 1XN (30), où N>=2, N étant le nombre de fibres optiques (31, 32, 33, 34, 35, 36, 37 et 38), au moins un nombre N de sections de réflexion (61, 62, 63, 64, 65, 66, 67 et 68) et au moins un nombre N d'atténuateurs optiques variables (71, 72, 73, 74, 75, 76, 77 et 78). Un des accès du circulateur (40) ou du coupleur 3dB est relié à un premier côté du (dé)multiplexeur MRL (30). Chaque fibre optique (31, 32, 33, 34, 35, 36, 37 et 38) comprend au moins un atténuateur optique variable (71, 72, 73, 74, 75, 76, 77 et 78) et au moins une section de réflexion (61, 62, 63, 64, 65, 66, 67 et 68), de telle façon qu'au moins un atténuateur optique variable (71, 72, 73, 74, 75, 76, 77 et 78) sera situé entre une section de réflexion (61, 62, 63, 64, 65, 66, 67 et 68) et le (dé)multiplexer MRL (30).

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