Cascaded raman pump for raman amplification in optical systems

Details Cascaded raman pump for raman amplification in optical systems Cascaded raman pump for raman amplification in optical systems

H - Electricity

01

S

H01S 3/094 (2006.01) H01S 3/30 (2006.01) H04B 10/17 (2006.01)

Patent

CA 2487148

A pumping module comprising a cascaded Raman laser for Raman amplified optical transmission systems is disclosed. Non-linear parametric phenomena, such as Raman-assisted three-wave mixing, in Raman amplified signals from a cascaded Raman pump are strongly reduced by substantially suppressing from the output spectrum of the Raman pump the emission peaks at wavelengths shorter than that of the desired pumping wave on a specific wavelength .lambda.n, and within a given spacing from .lambda.n. The pumping non-zero dispersion fibres with zero dispersion comprised between the wavelength range of the transmission signal and the wavelength range of the pump signal.

L'invention concerne un module de pompage comprenant un laser Raman en cascade destiné à des systèmes de transmission optique amplifiés Raman. Des phénomènes paramétriques non linéaires, tels que le mélange à trois ondes assisté par Raman, dans des signaux amplifiés Raman provenant d'une pompe Raman en cascade sont réduits de manière importante par suppression sensible, du spectre de sortie de la pompe Raman, des crêtes d'émission à des longueurs d'ondes inférieures à celles de l'onde de pompage souhaitée sur une longueur d'ondes spécifique ?¿n ?et dans un espacement donné de ?¿n?. Le module de pompage est spécialement conçu pour des systèmes de transmission optique comprenant des fibres à dispersion non nulle avec une dispersion nulle comprise entre la gamme de longueurs d'ondes du signal de transmission et la gamme de longueurs d'ondes du signal de la pompe.

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