Patent ID: 7003229
Filing Date: 2006-02-21
Classification: H04J

Abstract:
1. A method for optimizing the sequence order of optical passive filters in WDM (Wavelength Division Multiplex) multi-channel transmission systems, said optical passive filters making up mux/demux structures at nodes of the WDM system, the method comprising: setting a number of parameters identifying the WDM system; defining the attenuation profile over different channels of the WDM system, by using said parameters; determining an order sequence of the different channels in a mux/demux structure from the attenuation profile; determining an insertion loss profile of the different channels from the order sequence; determining a minimum span length between nodes resulting from applying said order sequence; wherein the parameters identifying the WDM system comprise: Number of channels: N; Set of wavelengths: λ Fiber loss profile: F Insertion loss model: I I Span length target: Slt [km] as required for the WDM system; Power Budget: Pb [dB] used between the nodes of the WDM system; Intermediate nodes: Inodes, maximum number of intermediate non-regenerative nodes.