Alcatel

Avanex Corporation

Fabrice Devaux

Alexandre Shen

Bernd Sartorius

Tolga Tekin

Michael Schlak

Eric Vergnol

Dominique Chiaroni

Patrick Brindel

Christopher Janz

Bruno Lavigne

Paul Salet

Hans Bissessur

Christophe Starck

Jean-Claude Jacquinot

Philippe Pagnod-Rossiaux

Jean-Guy Provost

Carsten Bornholdt

Cristopher Janz

Stephan Bauer

Domonique Chiaroni

Sylvain Blayac

Philippe Andre

An all-optical clock recovery system for recovering the clock from a received optical signal with a short response time and without patterning effects includes a first optical clock recovery device adapted to supply a first optical clock signal in response to the received optical signal and a second optical clock recovery device adapted to supply a second optical clock signal in response to the first optical clock signal. Applications include regenerating optical packets in asynchronous optical packet-switched telecommunication networks.

Optical clock recovery device for recovering the clock from an optical signal

The invention is also related to devices for a synchronization of data in an optical WDM transmission system, consisting of the following parts: A wavelength demultiplexer () for demultiplexing the incoming data stream in the synchronizer, delay lines () for the individual wavelength channels, a multiplexer (), a modulator () modulated by a high frequency clock signal () and at least one photodetector () tapped to output line (B) where the photodetector () is connected to an electronic control circuit () which is connected to the findividual delay lines () for an automatic delay control.

Method for adjusting time delays and device for synchronization of channels in a WDM system

A monolithic integrated optical component includes a control transistor connected to an electro-optical component including an active waveguide and at least one input waveguide and one output waveguide. The transistor is a heterojunction bipolar transistor including at least one sub-collector layer that is common to a confinement layer of the electro-optical component. The active waveguide of the electro-optical component includes a widened structure under a contact area of the heterojunction bipolar transistor and having substantially the same surface area as the transistor.

Monolithic integrated optical component including a modulator and a heterojunction bipolar transistor

Large surface amplifier with multimode interferometer

The present invention is a device for converting an RZ signal into a NRZ signal which contains an optical bistable device ( ), where an output level of this device passing from a low level to a high level when an input power level crosses in an upward direction a first threshold, and returning to a low level when an input level crosses in a downward direction a second threshold below the first, the output ( ) of the bistable ( ) carrying the NRZ signal, and a device ( ) for converting the RZ signal into a control signal of an output logic level of the optical bistable device ( ) receiving the RZ signal, and delivering the control signal of the optical bistable device ( ), this signal having a level above the first threshold when the RZ signal passes to and which becomes lower at the second threshold only if the RZ signal passes to and stays there for more than one bit time.

Optical signal converter from RZ format to NRZ format

An optical device for the differentiation of a first optical signal and an optical signal lagging behind the first, in which the differentiation is represented by a signal carried by a continuous wave passing through the two arms of an interferometer including media with an index that depends on the optical power passing through them. The delayed signal is the first signal fed back to one of the arms through a delay.

Optical differentiation device

Optical NRZ-RZ format converter

In a device for regenerating a wavelength-division multiplex optical signal, the optical signal to be regenerated comes from an optical fiber and is injected back into the same optical fiber or into another fiber. The device comprises at least one dispersive medium for receiving the wavelength-division multiplex signal and emitting a corresponding dispersed wave into a free space and a saturable absorber which receives the dispersed wave and transmits a corresponding regenerated wave.

Device including a saturable absorber for regenerating a wavelength-division multiplex signal

An optical signal regenerator includes a mechanism for reconstituting an optical signal carrier wave. The optical signal is thus regenerated on the same wavelength as the incoming carrier wave.

Regenerator with reconstitution of an optical signal carrier wave

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Montrouge, France

Fabrice Devaux