Patent ID: 6574413
Filing Date: 2003-06-03
Classification: H04B,H04J

Abstract:
A configuration for channel-dependent attenuation of levels of a plurality of optical data channels that each transmit signals of a specific wavelength, comprising:a filter device for splitting an input signal of a plurality of optical data channels between at least two optical paths in a wavelength-dependent manner, each one of said optical paths carrying a portion of the input signal having a frequency composition differing from frequency compositions of portions of the input signal carried by other ones of said optical paths, the portion of the input signal including a multiplicity of said plurality of said optical data channels; and an attenuating device located on at least one of said optical paths for attenuating the portion of the input signal on said one of said optical paths; said at least two optical paths and each portion of the input signal being recombined downstream of said attenuating device.