Method and apparatus for optical signal processing using an...

G - Physics – 02 – B

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G02B 6/28 (2006.01) G02B 1/10 (2006.01) G02B 6/34 (2006.01) G02B 27/00 (2006.01) H04J 14/00 (2006.01) H04J 14/02 (2006.01)

Patent

CA 2454631

An Optical Tapped Delay Line (OTDL), which resolves multiple wavelength signals having extremely narrow wavelength spacing, is combined with other known optical devices to provide a wide variety of optical processing application, including: multiplexing and de-multiplexing a multi-channel signal; adding a signal to, or dropping a signal from, a multi-channel optical signal; specialized coding processing such as generating code division multiple access signals; wavelength locking (stabilizing) a signal; filtering a signal; and analyzing and monitoring a signal spectrum. The OTDL (247) spatially separates individual channels to allow separate processing on each channel. The devices and processes disclosed have particular application to dense wavelength division multiplexing (DWDM) and permit a significant improvement in the quantity of information that can be carried on DWDM signals while enhancing signal quality.

Une ligne à retard à dérivation optique (OTDL), qui résout les signaux à longueurs d'ondes multiples présentant un espacement de longueur d'onde extrêmement étroit, est combinée à d'autres dispositifs optiques connus pour fournir une grande variété d'applications de traitement optique, consistant à: multiplexer re-multiplexer un signal multiplex; ajouter ou éliminer un signal d'un signal optique multiplex; appliquer un processus de codage spécialisé pour générer, par exemple, des signaux d'accès multiples à répartition en code; verrouiller en longueur d'onde (stabilisation) un signal; filtrer un signal; et enfin, analyser et surveiller un spectre de signal. La ligne OTDL (247) sépare spatialement les voies pour permettre le traitement individuel de celles-ci. Lesdits dispositifs et processus sont particulièrement appliqués dans le multiplexage par répartition en longueur d'onde dense (DWDM) et permettent d'améliorer de manière significative la qualité des informations pouvant être acheminées par les signaux DWDM, tout en améliorant la qualité des signaux.

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