Method, apparatus and system for wdm system equalization

Details Method, apparatus and system for wdm system equalization Method, apparatus and system for wdm system equalization

H - Electricity

04

B

H04B 10/16 (2006.01) H04B 10/17 (2006.01) H04J 14/02 (2006.01) H01S 3/067 (2006.01)

Patent

CA 2300747

An in-line repeater implemented within a Wavelength Division Multiplexed (WDM) optical fiber communication system is shown that includes an attenuator. The communication system includes a WDM multiplexer that transmits a WDM signal including a series of WDM channels, via the in-line repeater, to a demultiplexer that separates the WDM channels into a series of output signals. Within the in-line repeater, the attenuator is coupled between two stages of a single amplifier in order to aid in the power equalization of the WDM channels at the demultiplexer. The addition of the attenuator results in the powers and OSNR of the individual WDM channels becoming closer in value, hence reducing the time and the dynamic range of transmitter power adjustments required for traditional methods to equalize the channels' powers.

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