Alcatel

Nexans

Patrice Tran

Gabriel Charlet

Pierre Mirebeau

Hakim Janah

Bernard Aladenize

Daniel Acroute

Robert Gadessaud

A Raman amplifier for use in an optical fiber communication system with dispersion compensation has a first order Raman pump source and a second order Raman pump source both coupled to the input ports of a four-port optical coupler having two input ports and two output ports. One output port is connected to an optical fiber length to inject a pump light signal into the fiber length for second-order Raman amplification and the other output port is connected to a dispersion compensating fiber.

Multiple order Raman amplifier

The high or very high voltage DC cable has extruded polymeric insulation made out of a styrene-containing material. The material of the insulation is constituted by a mixture comprising polyethylene, a hydrogenated block copolymer of styrene, and an anti-oxiding agent, with the styrene content by mass being 11% to 18%, and the material is not cross-linked. The cable is suitable for use as a DC power cable.

High and very high voltage DC power cable

Growing community of inventors

Aubervilliers, France

Patrice Tran