144 patents
Page 4 of 8
Utility
Individually routable digital subcarriers
14 Jun 22
Consistent with an aspect of the present disclosure, electrical signals or digital subcarriers are generated in a DSP based on independent input data streams.
Kuang-Tsan Wu, Matthew L. Mitchell
Filed: 8 May 20
Utility
Hub-leaf laser synchronization
7 Jun 22
Consistent with the present disclosure a network is provided that includes a primary node and a plurality of secondary nodes.
John D. McNicol, Han Henry Sun, Kuang-Tsan Wu
Filed: 11 May 20
Utility
Clock recovery for digital subcarriers for optical networks
24 May 22
Optical network systems are disclosed, including a transmitter comprising a digital signal processor that receives data; circuitry that generate a plurality of electrical signals based on the data; a plurality of filters, each of which receiving a corresponding one of the plurality of electrical signals, a plurality of roll-off factors being associated with a respective one of the plurality of filters; a plurality of digital-to-analog converter circuits that receive outputs from the digital signal processor, the outputs being indicative of outputs from the plurality of filters; a laser that supplies light; and a modulator that receives the light and outputs from the digital-to-analog converter circuits, the modulator supplying a plurality of optical subcarriers based on the outputs of the digital-to-analog converter circuits, such that one of the plurality of optical subcarriers carrying information for clock recovery.
Jeffrey T. Rahn, Kuang-Tsan Wu, Steven Joseph Hand, Han Henry Sun
Filed: 26 Jun 20
Utility
System and method for topology discovery and fiber continuity verification in network
24 May 22
An optical network includes an arrangement of optical nodes.
Michael Marti, Rafael da Costa Miranda, Nuno Miguel Pires da Costa Pereira
Filed: 22 Feb 21
Utility
Correcting traffic misconnections in optical communications networks
17 May 22
An example system includes a transceiver and a microcontroller.
Rajan Rao, Steven J. Hand, Vasudha Bhaskara
Filed: 6 Jul 21
Utility
Framework for handling signal integrity using ASE in optical networks
17 May 22
A method and system is described.
Sharfuddin Syed, Ashwini K. Bhat, Vasudha Bhaskara
Filed: 23 Mar 20
Utility
Fast system optimization (FSO) with optimally placed recovery tones
3 May 22
Described herein is an apparatus including a continuous wave idler and an optical coupler that provide an optical signal having a power greater than optical channels carrying data, and positioned at a cross-over point between two spectral bands, with each band encompassing multiple optical channels.
Sumudu Geethika Edirisinghe, Pierre Mertz, Steven William Beacall
Filed: 17 Dec 20
Utility
Highly parallel and scalable cyclic redundancy check
19 Apr 22
Techniques for calculation of CRC values for very large Ethernet packets in a quick manner are disclosed.
Ashok Jain
Filed: 21 Dec 16
Utility
Multi layer protection control for coherent DWDM networks
19 Apr 22
A terminal node, an optical network and/or a method are described in which a first processor of a first optical protection switching module having a first optical switch, and a second processor of a second optical protection switching module having a second optical switch coordinate switching of the first optical switch and the second optical switch upon detection of a first failure by the first processor, or the detection of a second failure by the second processor.
Kapil Juneja, Amit Satbhaiya, Rajan Rao
Filed: 18 Dec 20
Utility
Dual parallel Mach-Zehnder-modulator device with pre-distorted driving voltages
5 Apr 22
Disclosed herein is a dual parallel Mach-Zehnder-modulator (DPMZM) device comprising a DPMZM 10 having first and second inner MZMs arranged parallel to each other.
Alessandro Bianciotto, Stefano CalabrĂ³, Maxim Kuschnerov, Mahdi Mezghanni, Antonio Napoli, Bernhard Spinnler
Filed: 26 Feb 19
Utility
Dynamically switching queueing schemes for network switches
5 Apr 22
An example system includes a first network node, a second network node, and a third network node.
Steven J. Hand
Filed: 31 Dec 19
Utility
Out-of-band communication channel for subcarrier-based optical communication systems
5 Apr 22
In an example method, an edge transceiver receives a first message from a hub transceiver over a first communications channel of an optical communications network, including an indication of available network resources on the optical communications network.
Steven J. Hand
Filed: 4 Jun 20
Utility
Dynamically switching queueing schemes for network switches
29 Mar 22
An example system includes a plurality of network nodes, each including one or more respective first transceivers configured to transmit data according to a first maximum throughput, and one or more respective second transceivers configured to transmit data according to a second maximum throughput that is less than the first maximum throughput.
Steven J. Hand
Filed: 31 Dec 19
Utility
OTDR with increased precision and reduced dead zone using superposition of pulses with varying clock signal delay
29 Mar 22
A method for determining the position of an irregularity in an optical transmission fiber using an optical time domain reflectometer, the method comprising the steps of emitting a succession of sampling light pulses into the optical transmission fiber, detecting reflected light pulses resulting from the reflection of the sampling light pulses at the irregularity in the optical transmission fiber and generating corresponding time-dependent detection signals, wherein different delays are associated with detection signals corresponding to different sampling light pulses, obtaining a combined signal from the detection signals, and analyzing the combined signal for determining the position of the irregularity in the optical transmission fiber with respect to the optical time domain reflectometer, wherein the combined signal corresponds to a superposition of the detection signals.
Lutz Rapp, Nuno Renato Duarte Pereira
Filed: 24 May 17
Utility
Method and apparatus for a restoration network with dynamic activation of pre-deployed network resources
22 Mar 22
An optical network having a first terminal node, a second terminal node, and a network service system is described.
Rajan Rao, Wayne Wauford, Vinesh Raghavan, Prasanjeet Khuntia
Filed: 31 Dec 19
Utility
Frequency division multiple access optical subcarriers
22 Feb 22
A network or system in which a hub or primary node may communicate with a plurality of leaf or secondary nodes.
Jeffrey T. Rahn, Kuang-Tsan Wu, Steven J. Hand, David F. Welch
Filed: 22 Sep 19
Utility
Time division multiple access optical subcarriers
22 Feb 22
A transmitter can include a laser operable to output an optical signal; a digital signal processor operable to receive data and provide a plurality of electrical signals based on the data; and a modulator operable to modulate the optical signal to provide a plurality of optical subcarriers based on the plurality of electrical signals.
Amir Jafari, Kuang-Tsan Wu, David F. Welch, Steven Joseph Hand, Mohamed Osman
Filed: 4 Mar 20
Utility
External network to network interface and optical express power controls
15 Feb 22
Methods, systems, and optical power controllers are disclosed.
Omer F. Yilmaz, Stephane St-Laurent, Steve Sanders, Matthew L. Mitchell
Filed: 20 Dec 18
Utility
Independently routable digital subcarriers for optical communication networks
15 Feb 22
Optical network systems and components are disclosed including a transmitter comprising a digital signal processor receiving a plurality of independent data streams, the digital signal processor supplying outputs based on the plurality of independent data streams, the digital signal processor comprising a plurality of pulse shape filters corresponding to the plurality of independent data streams, the plurality of pulse shape filters configured to filter the independent data streams to produce a first subcarrier having a first frequency bandwidth and a second subcarrier having a second frequency bandwidth different than the first frequency bandwidth for the outputs.
Jeffrey T. Rahn, Kuang-Tsan Wu, Steven Joseph Hand, Han Henry Sun
Filed: 7 Feb 19
Utility
Apparatus and method to reduce the impact of coherent crosstalk in optical networks
15 Feb 22
Optical networks, nodes and methods are disclosed.
Emilio Bravi
Filed: 12 Dec 18