Optical timing detection

Details Optical timing detection Optical timing detection

H - Electricity

04

L

H04L 7/027 (2006.01) G02F 1/35 (2006.01) G02F 2/00 (2006.01) H04B 10/12 (2006.01) H04B 10/17 (2006.01) H04L 7/00 (2006.01) H04J 14/08 (2006.01) H04L 7/033 (2006.01)

Patent

CA 2222669

Optical timing detection, for phase comparison of optical signals, or clock recovery is achieved by arranging an interferometer to be responsible to data transitions. A pulse train is fed into both arms of the interferometer. An optical amplifier (20) enables the interference condition to be changed when the data is fed into one arm. The output changed if the data transitions lose synchronisation with the pulse train.

La détection temporelle optique utilisée pour comparer les phases des signaux lumineux ou pour recouvrer les signaux d'horloge est réalisée en rendant un interféromètre sensible aux transitions de données. Un train d'impulsions est transmis aux deux bras de cet interféromètre. Un amplificateur optique (20) permet de modifier les conditions d'interférence quand les données sont introduites dans l'un des bras. Le signal de sortie varie quand les transitions de données et le train d'impulsions ne sont plus en synchronisme.

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