Patent ID: 7088496
Filing Date: 2006-08-08
Classification: H01S

Abstract:
1. A method for controlling a pump device of a fiber amplifier for amplification of a transmitted wavelength division multiplex signal, comprising a first pump source, the pump signal of which operates in an input area of the fiber amplifier, and with a second pump source, the pump signal of which operates in a further area of the fiber amplifier, wherein an actual power of the wavelength division multiplex signal is determined at the output of the fiber amplifier and the output powers of the two pump sources are controlled in order to adjust a noise figure of the amplified wavelength division multiplex signal, wherein for a total pump power varying over a total pump power range according to the number of active channels, the determined actual power of the wavelength division multiplex signal is compared with a reference power and wherein a required total pump power P in order to adjust a noise figure of the wavelength division multiplex signal, the output powers of the two pump sources are set as a function of the total pump power P