Alcatel Lucent

Alcatel

Laurent Labrunie

Eric Brandon

Jean-Pierre Blondel

Philippe Bousselet

Patrice Le Roux

Vincent Havard

François Boubal

Laurence Buet

System and method for dispersion compensation tuning for a WDM optical transmission system. A tunable dispersion compensation module () is located at or substantially close to a transmitting end of the optical transmission line () and at least one distributed Raman amplifier having an Raman pump () is coupled to the transmission lineThe dispersion compensation is controlled by means of a signal derived from the Raman pump () which is fed through a control loop () to the tunable dispersion compensation module ().

System and method for automatic tuning of chromatic dispersion compensation for a WDM transmission system using raman distributed co-pumping

The invention refers to a safety procedure for optical fiber systems. Such systems are widely used in telecommunication to transport optical signals between a transmitter terminal and a receiver terminal. By the invented safety procedure the optical input power fed into said optical fiber system is automatically shut off or at least reduced in case of an unintended escape of light from at least one fiber. A safety interface, provided in the transmission line detects changes of the total optical output power in at least one fiber and initiates a shut-down of the input power as soon as a decrease of the total output power is detected, that exceeds a predefined value within a predefined time window. Thus the slope of the total output power is measured and evaluated rather than its absolute value.

Safety procedure for optical fiber systems and safety interface to carry out such safety procedure

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Paris, France

Laurent Labrunie