Lucent Technologies Inc.

Bianca Buchold

Dieter Werner

Steffen Reichel

Bernd Teichmann

Konrad Czotscher

Raman amplification is used in optical transmission systems, devices and/or components way of for applying Raman amplification avoiding or suppressing detrimental and hence undesirable non-linear effects is provided. Raman amplification in an optical device is provided by firstly determining a pump power () necessary for providing Raman amplification and then by providing a low spectral power density by pumping the optical device with pump power () at a relatively broad pump power spectrum and preferably a low spectral pump power amplitude such that the total output pump power () remains sufficiently high. The pump power () is optically attenuated prior to being coupled to the optical device.

Method and contrivance for applying a Raman amplification in a transmission and/or fibre device

The dependency of intensity noise is used to determine the wavelength difference between a laser diode gain peak and a reflection peak of a fiber grating in a fiber grating type laser diode. Monitoring and determining the relative noise intensity of such a laser enables the control of the laser diode or the fiber grating such that the intensity noise is as low as possible. Such an approach enables the use of a fiber grating type laser diode as Raman pumps in high-speed transmission systems where low intensity noise is a requirement, especially when the Raman pump power propagates in the same direction as the transmission signals (known as Raman co-pumps).

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Nuremberg, Germany

Bianca Buchold