Infinera Corporation

Other

Infineria Corporation

Matthew L Mitchell

Robert B Taylor

Vincent G Dominic

Stephen G Grubb

Fred A Kish, Jr

Alan C Nilsson

David F Welch

Radhakrishnan L Nagarajan

Charles H Joyner

Richard P Schneider

Mark Missey

Atul Mathur

Drew Daniel Perkins

Ting-Kuang Chiang

Jonas Webjorn

Frank H Peters

Kuang-Tsan Wu

Michael Francis Van Leeuwen

Frank Peters

Marco Sosa

Stephane St-Laurent

Omer Faruk Yilmaz

Steve Sanders

Masaki Kato

Scott W Corzine

Steven Joseph Hand

Mehrdad Ziari

Daniel P Murphy

Jagdeep Singh

James Richard Dodd, Jr

Mark Tehmin Yin

Robert R Taylor

John Duncan McNicol

Jeffrey Thomas Rahn

Edward Everett Sprague

Zhong Pan

Vinayak Dangui

Donald J Pavinski

Fred A Kish

Robert Grencavich

Vinh D Nguyen

Donald J Pavinski, Jr

Mark J Missey

Marco E Sosa

Consistent with an aspect of the present disclosure, electrical signals or digital subcarriers are generated in a DSP based on independent input data streams. Drive signals are generated based on the digital subcarriers, and such drive signals are applied to an optical modulator, including, for example, a Mach-Zehnder modulator. The optical modulator modulates light output from a laser based on the drive signals to supply optical subcarriers corresponding to the digital subcarriers. These optical subcarriers may be received by optical receivers provided at different locations in an optical communications network, where the optical subcarrier may be processed, and the input data stream associated with such optical subcarrier is output. Accordingly, instead of providing multiple lasers and modulators, for example, data is carried by individual subcarriers output from an optical source including one laser and modulator. Thus, a cost associated with the network may be reduced. Moreover, each of the subcarriers may be detected by a corresponding one of a plurality of receivers, each of which being provided in a different location in the optical communication network. Thus, receivers need not be co-located, such that the network has improved flexibility.

Individually routable subcarriers

Individually routable digital subcarriers

Methods, systems, and optical power controllers are disclosed. Various problems caused by the use of a single L0 power controller in the prior art are addressed by using first and second L0 power controllers with the first L0 power controller managing first optical components with the optical network, and the second L0 power controller managing second optical components within the optical network.

External network to network interface and optical express power controls

An optical network is described that has a first ROADM node, a second ROADM node, and an optical transmission line establishing optical communication between the first ROADM node and the second ROADM node. The optical transmission line including an in-line amplifier node having a total input power and a total output power. The in-line amplifier node has a first monitoring tool configured to measure input optical power of the in-line amplifier node, and a second monitoring tool configured to measure output optical power of the in-line amplifier node. A software defined L0 network controller has circuitry configured to receive the optical power measured by the first and second monitoring tools from the in-line amplifier node, and to configure at least one of a gain and a gain tilt of the in-line amplifier node.

System architecture for power control in an optical transmission line

Method of control for the maintenance of the optical power in a ROADM network

A method may include transmitting, by an optical device, a first set of channels using a first modulation format. The first set of channels may be attenuated during transmission by a filter associated with a wavelength selective switch. The method may further include transmitting, by the optical device, a second set of channels using a second modulation format. The second set of channels may be attenuated during transmission by the filter associated with the wavelength selective switch. The first set of channels and the second set of channels may be included in a super-channel. The first modulation format may be selected based on a first signal quality factor associated with attenuation by the filter associated with the wavelength selective switch. The second modulation format may be selected based on a second signal quality factor associated with attenuation by the filter associated with the wavelength selective switch.

Reduction of wavelength selective switch (WSS) filter-based impairment using differentiated channel modulation formats

A method may include transmitting, by an optical device, a first set of channels using a first baud rate. The first set of channels may be attenuated during transmission by a filter associated with a wavelength selective switch. Transmitting, by the optical device, a second set of channels using a second baud rate. The second set of channels may be attenuated during transmission by the filter associated with the wavelength selective switch. The first set of channels and the second set of channels may be included in a super-channel. The first baud rate may be selected based on a first signal quality factor associated with attenuation by the filter associated with the wavelength selective switch. The second baud rate may be selected based on a second signal quality factor associated with attenuation by the filter associated with the wavelength selective switch.

Reduction of wavelength selective switch (WSS) filter-based impairment using differentiated channel baud rates

A cradle for facial support of a prone patient's head, the patient's head having a glabellar acupressure point between his or her eyes, the cradle including an 'E' cushion having upper and lower ends, and having left, right, and medial arms, each arm among the left, right, and medial arms having proximal and distal ends; the 'E' cushion's medial arm being adapted for, upon the facial support of the patient's head, impinging against his or her glabellar acupressure point; the cradle further incorporating a rigid base fixedly attached to the &#x201c;E&#x201d; cushion's lower end and &#x201c;velcro&#x201d; pads for releasably mounting the &#x201c;E&#x201d; cushion upon the support bracket arms of an examination table.

Facial cradle

A method may include transmitting, by an optical device, a first channel. The first channel may have a first set of subcarriers. The first channel may be attenuated during transmission by a filter associated with a wavelength selective switch. The method may further include transmitting, by the optical device, a second channel. The second channel may have a second set of subcarriers. The second channel may be attenuated during transmission by the filter associated with the wavelength selective switch. The first channel and the second channel being included in a super-channel. The first set of subcarriers may be selected based on a first signal quality factor associated with attenuation of the first set of subcarriers by the filter. The second set of subcarriers may be selected based on a second signal quality factor associated with attenuation of the second set of subcarriers by the filter.

Reduction of wavelength selective switch (WSS) filter-based impairment using selective subcarrier adjustment

A method may include interleaving, by an optical device, a set of bits of a first channel with a set of bits of a second channel. The first channel may include first forward error correction (FEC) data associated with the set of bits of the first channel and the second channel may include second FEC data associated with the set of bits of the second channel. The method may further include transmitting first information via the first channel and second information via the second channel. The first information may include a portion of the set of bits of the first channel, a portion of the set of bits of the second channel, and the first FEC data. The second information may include another portion of the set of bits of the first channel, another portion of the set of bits of the second channel, and the second FEC data.

Reduction of wavelength selective switch (WSS) filter-based impairment using multi-channel forward error correction averaging via interleaving

An apparatus may include a plurality of wavelength selective switches (WSSs). The apparatus may include a plurality of transmitters. The transmitters may transmit a plurality of super-channels. The apparatus may include a plurality of passive power splitters corresponding to the plurality of transmitters. The plurality of passive power splitters may receive the plurality of super-channels. The plurality of passive power splitters may generate a respective set of power-split super-channels for each super-channel of the plurality of super-channels. The plurality of passive power splitters may transmit each power-split super-channel of the respective set of power-split super-channels to a corresponding WSS of the plurality of WSSs. A WSS, of the plurality of WSSs, may receive a plurality of power-split super-channels, of the respective sets of power-split super-channels, from the plurality of passive power splitters. The WSS may selectively route a portion of the plurality of power-split super-channels toward a receiver.

Wavelength selective switch (WSS) based multiplexing architecture

An optical transmitter may include one or more lasers configured to provide a primary optical signal having a primary wavelength and a secondary optical signal having a secondary wavelength to a modulator via corresponding first and second modulator inputs. The modulator may combine the primary and secondary optical signals into a combined optical signal and modulate, with an electrical signal, the combined optical signal to provide a modulated optical signal to an optical filter. The optical filter may be configured to separate, from the modulated optical signal, a modulated primary optical signal having the primary wavelength and a modulated secondary optical signal having the secondary wavelength and provide the modulated primary optical signal to a primary optical link and the modulated secondary optical signal to a secondary optical link.

Optical link protection using common modulation of multiple combined wavelengths

A Raman pump may include a dual output laser configured to output two optical signals; a delay interferometer configured to delay a first of the two optical signals to decorrelate the two optical signals from each other; and a combiner configured to combine the delayed first of the two optical signals and a second of the two optical signals to provide a Raman amplification signal.

Raman pump circuit

Growing community of inventors

Monte Sereno, CA, United States of America

Matthew L Mitchell