Optical communication using dispersion-induced fm to am...

H - Electricity – 04 – B

Patent

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H04B 10/12 (2006.01) H04B 10/18 (2006.01)

Patent

CA 2122381

An optical communication system and method are provided which utilize dispersion-induced FM to AM conversion with nonlinearity-induced AM stabilization. The system and method utilize a frequency modulated optical signal transmitter, a fiber span, an optical receiver which receives the transmitted optical signal and detects an AM signal resulting from dispersion-induced energy overlaps and voids in the optical signal, and one or more in-line amplifiers spaced within the optical fiber span. By adjusting the number, position and/or output power levels of the in-line amplifiers, stabilization of the energy voids and overlaps and resulting AM signal can be achieved, yielding a substantial increase in achievable transmission distance at a given bit rate.

L'invention est constituée par un système et une méthode de communication optiques qui utilisent la conversion FM-AM induite par dispersion avec stabilisation de la modulation d'amplitude induite par une non-linéarité. Le système et la méthode de l'invention utilisent un émetteur de signaux lumineux modulés en fréquence, un faisceau de fibres, un récepteur servant à recevoir les signaux lumineux émis qui détecte le signal modulé en amplitude résultant des chevauchements et des vides induits par dispersion dans l'énergie des signaux lumineux, et un ou plusieurs amplificateurs espacés les uns des autres sur le faisceau de fibres. En ajustant le nombre, les emplacements et/ou les niveaux de ces amplificateurs, on peut stabiliser les vides et les chevauchements en question pour obtenir le signal modulé en amplitude résultant, ce qui permet d'accroître substantiellement la distance de transmission possible pour un débit binaire donné.

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