Peter J Winzer, Christopher Richard Doerr: Multi-core optical fiber and optical communication systems. Alcatel Lucent, John F McCabe, August 6, 2013: US08503845 (122 worldwide citation)

An apparatus includes an optical fiber having a plurality of optical cores therein. Each optical core is located lateral in the optical fiber to the remaining one or more optical cores and is able to support a number of propagating optical modes at telecommunications wavelengths. Each number is less ...

Anjali Agarwal, Andreas Benz, Sethumadhavan Chandrasekhar, Peter J Winzer: Optical receiver apparatus and method. Alcatel Lucent USA, January 13, 2009: US07477852 (17 worldwide citation)

A method and apparatus for receiving narrowband filtered optical PSK signals, including converting PSK optical signals into intensity-modulated signals at a receiver, and introducing a desired amplitude imbalance between the first and the second intensity-modulated signals to improve receiver perfor ...

Peter J Winzer: Optical device with tunable coherent receiver. Lucent Technologies, September 11, 2007: US07269356 (16 worldwide citation)

An add-side laser in an optical device, such as an add/drop multiplexer OADM, provides not only a source for an add-side wavelength to be added to an output of the device, but also a reference for a receive-side coherent receiver that is included in the optical device.

Sethumadhavan Chandrasekhar, Andrew Roman Chraplyvy, Christopher Richard Doerr, Peter J Winzer: Multi-channel optical equalizer for intersymbol interference mitigation. Lucent Technologies, August 31, 2004: US06785446 (15 worldwide citation)

An improved multi-channel optical equalizer method and apparatus for intersymbol interference mitigation compensates many wavelength channels simultaneously and requires few adjustable parameters. The equalizer unit has only two control signals, one to control signal magnitude and one to control sig ...

Christopher Richard Doerr, Christophe J Dorrer, Peter J Winzer: Linear optical sampling method and apparatus. Lucent Technologies, May 9, 2006: US07042629 (11 worldwide citation)

A linear optical sampling apparatus, temporally samples a modulated optical signal using the amplitude of the interference of its electric field with the electric field of a laser pulse. The apparatus includes a 90° optical hybrid that combines the optical signal and laser pulse in order to generate ...

Christopher Richard Doerr, Peter J Winzer: Cloning optical-frequency comb sources. Lucent Technologies, October 17, 2006: US07123402 (10 worldwide citation)

Method and apparatus for creating a clone relationship between two or more optical-frequency comb sources (OFCSs). In one embodiment, the invention is an apparatus having (i) first and second OFCSs, each adapted to generate a respective frequency comb, and (ii) means for locking the phases of two co ...

Harsha S Nagesh, Viswanath Poosala, Dimitrios Stiliadis, Peter J Winzer, Martin Zirngibl: Load balancing method and apparatus for ethernet over SONET and other types of networks. Lucent Technologies, October 21, 2008: US07440404 (8 worldwide citation)

A load-balanced network architecture is disclosed in which a traffic flow at a given network node is split into a plurality of parts, and the parts are distributed to respective ones of the plurality of nodes that are designated as participating in a load balancing process for the traffic flow. Each ...

Christopher Richard Doerr, Peter J Winzer: QAM optical modulators. Alcatel Lucent USA, John F McCabe, December 22, 2009: US07636501 (8 worldwide citation)

An exemplary optical modulator includes an interferometer. The interferometer includes an input optical coupler, an output optical coupler, and two or more controllable optical waveguides. Each controllable optical waveguide connects the input optical coupler to the output optical coupler and has an ...

Rene&apos Jean Essiambre, Peter J Winzer: Arrangement for generating chirped return to zero (CRZ) optical data signals. Barry H Freedman, David Sasso, February 17, 2004: US06693929 (8 worldwide citation)

Optical chirped return-to-zero (CRZ) data signals are generated without the need for a separate phase modulator, by using a dual-drive Mach-Zehnder modulator for RZ pulse carving that is driven with two typically sinusoidal signals of either unequal amplitude or unequal relative phase, i.e. of non-v ...

Peter J Winzer: Receiver algorithms for coherent detection of polarization-multiplexed optical signals. Alcatel Lucent, Hitt Gaines PC, October 29, 2013: US08571423 (7 worldwide citation)

A digital signal processor (DSP) operating within, for example, an optical receiver wherein the DSP processes complex sample streams derived from a received digitally modulated optical signal, the DSP configured to perform a method comprising: using a filter adaptation algorithm (FAA), processing di ...