Siemens Aktiengesellschaft

Nokia Siemens Networks Gmbh & Co Kg

Xieon Networks S.a.r.l.

Guido Gentner

Lutz Rapp

Gerhard Thanhäuser

Peter Krummrich

Richard Neuhauser

Ulrich Gaubatz

Christian Eder

Anton Schex

René´ Neumann

A method and a device is provided driving an optical laser diode () during operation in an optical communication network, by determining a laser transfer function () during operation of the laser diode () and providing a control signal () for driving the laser diode () according to the laser transfer function (). Further, a method for driving a first and a second optical laser diode during operation in an optical communication network is provided. Furthermore, an optical amplifier and a communication system is suggested.

Operating a laser diode in an optical network

Optoelectrical conversion of the received optical service signal (OSS), bandpass filtering and subsequent squaring produce a spectral line at the clock frequency (f). This clock line (TL) is selected by means of narrowband filtering and rectified. The service signal voltage (V) obtained in this manner is used to switch on a Raman pump laser ().

Method and arrangement for switching a Raman pump laser on and/or off

The invention relates to a method for detecting a check-back signal in a transmission system for optical signals. According to said method, a constant proportion of the output in a defined frequency range of the check-back signal is concentrated in a narrow-band spectral range and is determined after a transmission phase by means of a narrow-band detection of the concentrated energy around the spectral range. If no signal is identified during the narrow-band detection, a line interruption is determined and no pump source is switched on for safety reasons. The narrow-band detection of the check-back signal also allows the transmission attenuation of the transmission system to be measured.

Method for detecting a check-back signal in an optical transmission system

Control method and optical data transmission path having a device for determining the tilting of the spectrum, and having a quick control and slow control for compensating the tilting of the spectrum.

Control method and optical data transmission path for compensating changes in SRS-induced power exchange

A method for producing non-equidistant pump waves for Raman amplification of a signal which is passed via an optical waveguide, as well as a pump wave producing apparatus for producing pump waves for Raman amplification of a signal which is passed via an optical waveguide, which apparatus has at least one pump source and is set up such that it can produce pump waves at a first, a second, a third and a fourth mutually equidistant pump wavelength, having a control device which is set up such that it causes, in each case, the production of a pump wave u, v, w at the first, second and fourth pump wavelengths, with the control device being set up such that no pump wave is produced at the third pump wavelength, so that a non-equidistant pump channel pattern is achieved overall.

Growing community of inventors

Munich, Germany

Guido Gentner