Siemens Aktiengesellschaft

Xieon Networks S.a.r.l.

Nokia Siemens Networks Gmbh & Co Kg

Elenion Technologies, LLC

Nokia Siemens Networks Oy

Erich Gottwald

Harald Rohde

Christoph Glingener

Bernd-Harald Horst Jurgen Rohde

Sylvia Smolorz

Thomas Treyer

Christian Scheerer

Werner Paetsch

Nancy Hecker

Harald Geiger

Karl Kloppe

Lutz Rapp

Bernhard Spinnler

Stefano Calabro

Berthold Lankl

Jörg-Peter Elbers

Ernst-Dieter Schmidt

Cornelius Fuerst

Andreas Faerbert

Ulrich Gaubatz

Georg Mohs

Klaus Kotten

Walter Proebster

Wolfgang Schairer

Chandan Das

Beate Oster

Georg Sebald

Sönke Rosner

Curt Badstieber

An heterodyne apparatus and method for measuring performance parameters of a coherent optical receiver at RF frequencies is disclosed. Two coherent lights are launched into signal and LO ports of the receiver with an optical frequency offset f. One of the lights is modulated in amplitude at a test modulation frequency F. COR performance parameters are determined by comparing two frequency components of the COR output. CMRR is determined based on a strength of a direct detection spectral line at the modulation frequency relative to that of spectrally-shifted lines at (F&#xb1;f). GDV information is obtained by modulating one of the lights at two phase-locked frequencies, such as F and 2F, and comparing phases of two time-domain traces corresponding to frequency components of the COR output signal at the two frequencies.

Coherent optical receiver testing

An heterodyne apparatus and method for measuring performance parameters of a coherent optical receiver at RF frequencies is disclosed. Two coherent lights are launched into signal and LO ports of the receiver with an optical frequency offset f. One of the lights is modulated in amplitude at two phase-locked modulation frequencies Fand F. COR performance parameters are determined by comparing two frequency components of the COR output. The group delay variation (GDV) information is obtained by comparing phases of two time-domain traces corresponding to frequency components of the COR output signal at the two modulation frequencies shifted by the optical frequency offset f.

A method for data processing of an optical network unit is provided, the method comprising the steps of receiving a configuration information at the optical network unit, adjusting a light signal to a wavelength or wavelength range indicated by the configuration information, demodulating an incoming optical signal by means of the light signal, mixing the demodulated incoming optical signal with a signal generated by an oscillator and generating a modulated optical upstream signal modulating the light signal by means of a software radio, so that the resulting optical upstream frequency can be shifted with respect to the frequency of the local oscillator by a programmable amount. Furthermore, an according device and a communication system are suggested comprising at least one such device.

Data processing of an optical network element

An optical IQ modulator (IQM) including two parallel Mach-Zehnder modulators (MZM, MZM) generates single sideband data signals. A control unit () generates additional optical single sideband pilot signals (PS, PS) positioned in a lower and a higher sideband respectively, and also further pilot signals (PS, PS) in both sidebands. A IQ modulator output signal (MOS) converted into electrical monitoring signals (MOS) and monitored. A control unit () selects control signals (CS, CS, CS) and controls the IQ modulator via its bias ports () till the power transfer functions (PTF) of the Mach-Zehnder modulators (MZM, MZM) and the phase difference (&#x394;&#x3a6;) between their output signals is optimized.

Optical IQ modulator control

An optical network element has a light source which provides an optical signal that is fed to at least two modulators. Each modulator provides an optical carrier signal that is conveyed to a receiving unit. The receiving unit is configured to determine a deviation signal between the optical carrier signal and a carrier conveyed via an incoming signal and to feed the deviation signal to the modulator for adjusting the frequency and/or the phase of the optical carrier signal. Also, a corresponding method for processing data and a communication system with at least one optical network are described.

Optical network element

A method and a device for conveying optical data are provided, wherein an optical network unit conveys data to a terminal via dual sideband modulation, wherein the terminal processes only the upper or only the lower sideband received from the optical network unit, and wherein several dual sideband modulated signals from several optical network units partially overlap when being received at the terminal. Furthermore, a communication system is suggested comprising at least one such device.

Method and device for conveying optical data

An optical network unit has a tunable laser. The tunable laser is tunable such that a point-to-point connection to another optical network unit is established via an optical fiber. There is also provided a method for processing data in an optical network and a corresponding communication system. The tunable laser can be adjusted based on a detected collision, and a frequency grid can be supplied from a centralized component.

Optical network unit, method for processing data in an optical network and communication system

The present invention provides an apparatus, in particular an optical network unit, which comprises a first part operably coupled to an arm of an optical fiber network, the first part comprises an optical module including an optical-electric interface and/or an electric-optical interface locked on a preset wavelength band, and an interface module, and at least one second part operably coupled to a network entity of a communication network, each comprising a control unit, a signal processing unit and an interface module. One of the control units of the at least one second part is set by a optical line terminal of the optical fiber network as a master control unit configured to tune and control the optical module of the first part. The first part and the at least one second part are wireless coupled with respect to each other via the interface modules.

Optical network unit

An optical network component is provided comprising a semiconductor optical amplifier with an input and an output, wherein the input is connected to a light source, wherein the output is connected to an amplitude modulator, wherein the semiconductor optical amplifier converts an amplitude modulated signal from the amplitude modulator to a phase modulated signal and provides the phase modulated signal at its output. Also, a transmitter comprising at least one such optical network component is suggested.

Optical network component and method for processing data in an optical network

A method and devices for processing data in an optical network are provided, wherein a centralized component is connected to several decentralized components; wherein first data is conveyed from the centralized component to at least two decentralized components, wherein at least two decentralized components share an optical resource; and wherein second data is conveyed from the decentralized component to the decentralized component via at least one separate optical resource. Furthermore, a communication system is suggested comprising said device.

Processing data in an optical network

An optical component contains a tunable laser. The tunable laser provides an optical local oscillator signal, and the tunable laser is directly modulated to provide a modulated optical data signal. In this manner we have optimization of the channel wavelength and obtain an optimized electrical and optical bandwidth utilization. Furthermore, a method for data processing is suggested.

Optical component and method for data processing

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Holzkirchen, Germany

Erich Gottwald