Infinera Corporation

Sdl Inc.

Corvis Corporation

Lucent Technologies Inc.

At+t Corp.

Other

At&t Bell Laboratories

Jds Uniphase Corporation

Infineria Corporation

Stephen G Grubb

David F Welch

Raymond Zanoni

Vincent G Dominic

Matthew L Mitchell

Robert B Taylor

Fred A Kish, Jr

Charles H Joyner

Drew Daniel Perkins

Ting-Kuang Chiang

Alan C Nilsson

Radhakrishnan L Nagarajan

Mark Missey

Atul Mathur

Richard P Schneider

Robert G Waarts

Thomas David Stephens

Frank H Peters

Jonas Webjorn

Jean-Luc Archambault

Kenneth L Walker

John J Veselka, Jr

Donald M Cornwell, Jr

Kuang-Tsan Wu

John Duncan McNicol

Pierre Mertz

Edward Everett Sprague

Frank Peters

Prasad Paranjape

Paul Nathan Freeman

Parthiban Kandappan

Ruxiang Jin

Donald R Scifres

Bernard G Fidric

Alistair J Price

Andrew John Stentz

Daryl Inniss

Marco Sosa

Michael C Antone

David John DiGiovanni

Steven Sanders

David G Mehuys

Stuart MacCormack

James Richard Dodd, Jr

Jagdeep Singh

Mark Tehmin Yin

Daniel A Ratoff

Thomas D Stephens

Robert R Taylor

Wei Chen

Thomas Andrew Strasser

David A Miller

Biao Lu

Thomas L Koch

Per Bang Hansen

Lars Erik Eskildsen

Michael Francis Van Leeuwen

Igal M Brener

Clifford E Headley

Robert E Betzig

Bennett H Rockney

Ralph Stephen Jameson

Donald J Pavinski

Fred A Kish

Hai Xu

Martin H Muendel

Janet Renee Pedrazzani

Jeff Rahn

Robert Grencavich

Vinh D Nguyen

Donald J Pavinski, Jr

Deepak Boggavarapu

Emily F Burmeister

Mark J Missey

Marco E Sosa

Consistent with the present disclosure, chromatic dispersion is introduced into an optical communication path including multiple segments or spans of dispersion shifted fiber (DSF). The chromatic dispersion generates phase mismatching between optical signals propagating along the optical communication path, i.e., the optical signals are decorrelated, such that mixing products are reduced inmagnitude, and the noise attributable to four wave mixing is correspondingly reduced.

Suppression of non-linear effects in low dispersion optical fibers

An apparatus including a photodiode, a low pass filter, an analog-to-digital converter, an interpolation circuit and a digital signal processor is disclosed. The photodiode receives a portion of a plurality of optical signals, each of which is modulated in accordance with a corresponding one of a plurality of data streams, and each having a corresponding one of a plurality of wavelengths. The photodiode supplies an electrical output. The low-pass filter supplies a filtered output in response to the electrical output. The analog-to-digital converter is configured to sample the filtered output at a first sampling rate to generate a plurality of first data samples. The interpolation circuit is configured to receive the plurality of first data samples and supply a plurality of second data samples at a second sampling rate less the first sampling rate. The digital signal processor circuit is configured to receive the plurality of second data samples.

Upsampling optical transmitter

Consistent with the present disclosure, data, in digital form, is received by a transmit nodes of an optical communication, and converted to analog signal by a digital-to-analog converter (DAC) to drive a modulator. The modulator, in turn, modulates light at one of a plurality of wavelengths in accordance with the received data. The modulated light is then transmitted over an optical communication path to a receive node. At the receive node, the modulated optical signal, as well as other modulated optical signals are supplied to a photodetector circuit, which receives additional light at one of the optical signal wavelengths from a local oscillator laser. An analog-to-digital converter (ADC) is provided in the receive node to convert the electrical signals output from the photodetector into digital form. The output from the ADC is then filtered in the electrical domain, such that optical demultiplexing of individual channels is unnecessary.

Wavelength division multiplexed optical communication system having variable channel spacings

Embodiments of the present invention compensate for skew across a wavelength division multiplexed network. The network is a wavelength division multiplexed optical transport network. The skew compensation can be performed electrically or optically. It can be performed on the transmission side of the network, the receiver side of the network or at any intermediary node on the network.

Communication network with skew compensation

Wavelength division multiplexed optical communication system architectures

Wavelength division multiplexed optical communication system having variable channel spacings and different modulation formats

A photonic integrated circuit (PIC) chip comprising an array of modulated sources, each providing a modulated signal output at a channel wavelength different from the channel wavelength of other modulated sources and a wavelength selective combiner having an input optically coupled to received all the signal outputs from the modulated sources and provide a combined output signal on an output waveguide from the chip. The modulated sources, combiner and output waveguide are all integrated on the same chip.

Transmitter photonic integrated circuit (TxPIC) chip

Embodiments of the present invention route a wavelength division multiplexed signal across multiple communication paths using skew characteristics of at least some of the communication paths. The network is a wavelength division multiplexed optical transport network. The plurality of communication paths involves different signal and path attributes such as a plurality of carrier wavelengths, optical carrier groups, physical communication paths (different nodes, different fibers along a same path, or any combination of the foregoing), or any other differentiating factors between two paths.

Communication network with node bypassed co-routed multi-channel traffic

Communication network with co-routed multi-channel traffic

Embodiments of the present invention provide an array of semiconductor optical amplifiers, within a photonic integrated circuit (hereinafter, 'PIC'), that apply a gain to one or more optical bands within a WDM signal. According to various embodiments of the invention this array of SOAs can function as both an amplifier and a ROADM by adjusting the gain characteristics of one or more of the SOAs within the array. A band within the WDM signal may be blocked by adjusting the SOA, corresponding to the particular band, to attenuate the band below a threshold.

Banded semiconductor optical amplifiers and waveblockers

Transmitter photonic integrated circuit (TxPIC) chips

A wavelength division multiplexing system has a wavelength division multiplexer and a wavelength division demultiplexer. The wavelength division demultiplexer is in series with the wavelength division multiplexer to process at least one optical signal to generate at least one processed optical signal. The wavelength division multiplexer and the wavelength division demultiplexer cooperate to introduce substantially zero total chromatic dispersion in the processed optical signal. In one version, the wavelength division multiplexer and the wavelength division demultiplexer introduce opposing functions of chromatic dispersion into the at least one processed optical signal.

Performance compensated Tx/Rx optical devices

Monolithic transmitter photonic integrated circuit (TXPIC) with a transversely disposed output

Embodiments of the present invention route a WDM signal across multiple communication paths using skew characteristics of at least some of the communication paths. The network is an optical transport network, using either circuit or packet based switching, and wavelength division multiplexed wavelengths and/or optical carrier groups ('OCGs') over a fiber link to another node in the network. The plurality of communication paths involves different signal and path attributes such as a plurality of carrier wavelengths, optical carrier groups, physical communication paths (different nodes, different fibers along a same path, or any combination of the foregoing), or any other differentiating factors between two paths.

Communication network with skew path monitoring and adjustment

Growing community of inventors

Ellicott City, MD, United States of America

Stephen G Grubb