Optical transmission line, method for manufacturing optical...

Details Optical transmission line, method for manufacturing optical... Optical transmission line, method for manufacturing optical...

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G02F 1/35 (2006.01) H01S 3/22 (2006.01) H01S 3/30 (2006.01) H04B 10/17 (2006.01) H01S 3/067 (2006.01) H01S 3/094 (2006.01) H01S 3/107 (2006.01)

Patent

CA 2365109

An optical transmission line for Raman-amplifying an optical signal by supplying pumping light. A range where the Raman gain coefficient takes on a maximum is a predetermined distance away from the end where the pumping light is supplied in the direction of the propagation of the pumping light. The power of the optical signal does not increase to the extent that the optical Kerr effect becomes remarkable at any point of the optical transmission line, does not decrease to the extent that the SN ratio remarkably lowers, and is ensured to have a large value at the end of the transmission line. A method for manufacturing the optical transmission line and an optical transmission system comprising the optical transmission line are also disclosed.

L'invention concerne une ligne à transmission optique pour l'amplification Raman d'un signal optique, qui utilise la lumière pompée. Une plage dans laquelle le coefficient de gain Raman atteint un maximum correspond à une distance prédéterminée depuis une extrémité à laquelle est envoyée la lumière de pompage dans la direction de propagation de la lumière de pompage. La puissance du signal optique n'augmente pas jusqu'au niveau auquel l'effet Kerr optique puisse être remarqué dans n'importe quel point de la ligne de transmission optique; elle ne diminue pas jusqu'à ce que le rapport signal-bruit baisse remarquablement; et l'on fait en sorte qu'elle ait une valeur plus importante à l'extrémité de la ligne de transmission. L'invention concerne aussi un procédé pour fabriquer une ligne de transmission optique et un système de transmission optique comprenant la ligne de transmission optique.

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