Xieon Networks S.a.r.l.

Antonio Napoli

Bernhard Spinnler

Alessandro Bianciotto

Maxim Kuschnerov

Christina Hebebrand

Mahdi Mezghanni

Stefano Calabro

Berthold Lankl

Stefano Calabró

Chien-Yu Lin

Vincentius Antonius Johannes Mar Sleiffer

Disclosed herein is a dual parallel Mach-Zehnder-modulator (DPMZM) device comprising a DPMZMhaving first and second inner MZMs arranged parallel to each other. The first inner MZM generates an in-phase component Eof an optical signal in response to a first driving voltage V, and the second inner MZM generates a quadrature component Eof said optical signal in response to a second driving voltage V. Further disclosed is a calculation unitconfigured for receiving an in-phase component yand a quadrature component yof a desired base-band signal, and for calculating pre-distorted first and second driving voltages V, V. The calculation of the pre-distorted first and second driving voltages V, Vis based on a model of said DPMZMaccounting for I-Q cross-talk, and using an algorithm that determines said first and second driving voltages V, Veach as a function of both of said in-phase and quadrature components y, yof said base-band signal.

Dual parallel Mach-Zehnder-modulator device with pre-distorted driving voltages

A method and device is provided for reducing optical transmission impairments, particularly nonlinear effects, of at least one link Said method comprising the following steps: extracting a phase information (&#x394;&#x3b8;) from an optical signal () received via that at least one link, determining a nonlinear coefficient (&#x3b3;), associated with the at least one link, based on the phase information (&#x394;&#x3b8;), applying a control mechanism () using the nonlinear coefficient (&#x3b3;). Furthermore, a communication system is suggested comprising said device.

Method, device and communication system for reducing optical transmission impairments

Component signal values are derived from component signals and fed to at least one fixed equalizer which generates equalizer output signals. The signals are fed to phase error detectors generating phase error signals. The phase error signals are combined with further phase error signals derived by further error detectors receiving signal values from further equalizers and/or the component signal values directly from sample units.

Clock recovery method and clock recovery arrangement for coherent polarization multiplex receivers

The invention describes a method and an arrangement for transmitting an optical transmission signal with reduced polarization-dependent loss. A first transmission signal component and a second orthogonal transmission signal component of the optical transmission signal are transmitted with a time difference between said transmission signal components.

Method and arrangement for transmitting an optical transmission signal with reduced polarisation-dependent loss

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Munich, Germany

Antonio Napoli