Multi-stage raman amplifier

Details Multi-stage raman amplifier Multi-stage raman amplifier

H - Electricity

01

S

H01S 3/30 (2006.01) H04B 10/17 (2006.01) H01S 3/067 (2006.01)

Patent

CA 2492810

A Raman amplifier comprises at least a first and a second optical Raman-active fiber disposed in series with each other. A first pump source is connected to the first Raman-active fiber, and is adapted for emitting and coupling into the first Raman-active fiber a first pump radiation including a first group of frequencies. A second pump source is connected to the second Raman-active fiber, and is adapted for emitting and coupling into the second Raman-active fiber a second pump radiation including a second group of frequencies. The whole of said first and second group of frequencies extends over a pump frequency range having a width of at least the 40% of the Raman shift. The minimum and the maximum frequency in each of said first and second group of frequencies differ with each other of at most the 70% of said Raman shift.

Cet amplificateur Raman comprend au moins deux fibres optiques actives Raman installées en série. Une première source de pompage, qui est reliée à la première fibre active Raman, est conçue pour émettre et injecter dans cette première fibre active Raman un premier rayonnement de pompage renfermant un premier groupe de fréquences. Une seconde source de pompage, qui est reliée à la seconde fibre active Raman, est conçue pour émettre et injecter dans cette seconde fibre active Raman un second rayonnement de pompage renfermant un second groupe de fréquences. Ces deux groupes de fréquences ont une plage de fréquences d'une largeur égale à au moins 40 % du décalage de Raman. Les fréquences, minimale et maximale, de chacun des groupes de fréquences diffèrent l'une de l'autre d'au plus 70 % de ce décalage de Raman.

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