H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 10/18 (2006.01) H04B 10/155 (2006.01) H04J 14/02 (2006.01)
Patent
CA 2727494
An improved method and apparatus is provided for transmitting a WDM optical signal. The method begins by modulating optical channels that are each located at a different wavelength from one another with (1) a respective one of a plurali-ty of information-bearing electrical signals that all embody the same broadcast information; (2) a respective one of a plurality of RF signals having a common functional broadcast waveform, at least one of the RF signals being out of phase with respect to re-maining ones of the plurality of RF signal and (3) at least one of the RF signals being phase adjusted with respect to its original phase. Each of the modulated optical channels is multiplexed to form a WDM optical signal. The WDM optical signal, while maintaining the pre-assigned phase relationships between the modulation signals of the optical channels, is forwarded onto an op-tical transmission path.
Linvention concerne un procédé et un appareil améliorés pour émettre un signal optique WDM. Le procédé commence par la modulation de canaux optiques qui se situent chacun à une longueur donde différente dun autre avec (1) un signal correspondant parmi une pluralité de signaux électriques porteurs dinformation qui représentent tous la même information diffusée; (2) un signal correspondant parmi une pluralité de signaux RF ayant une forme donde de diffusion fonctionnelle commune, au moins lun des signaux RF étant déphasé par rapport aux autres de la pluralité de signaux RF et (3) la phase dau moins un des signaux RF est ajustée par rapport à sa phase originale. Chacun des canaux optiques modulés est multiplexé pour former un signal optique WDM. Le signal optique WDM, tout en maintenant les relations de phase prédéfinies entre les signaux de modulation des canaux optiques, est transmis sur un chemin de transmission optique.
Litvin Kerry
Wang Jun J.
General Instrument Corporation
Gowling Lafleur Henderson Llp
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