公开(公告)号：US20240243832A1

公开(公告)日：2024-07-18

申请号：US18096128

申请日：2023-01-12

Applicant: Cisco Technology, Inc.

Inventor： Jean-Luc Joseph Tambasco ,  Dominic Francis Siriani

IPC: H04J14/02 ,  H04B10/294

CPC classification number: H04J14/0201 ,  H04B10/294

Abstract: A method and apparatus are provided. The method includes receiving, at a TE0 mode add/drop filter, a TE0 mode optical signal having a first wavelength and a second wavelength, and transmitting, from the TE0 mode add/drop filter, the TE0 mode optical signal having the first wavelength and the second wavelength towards a Bragg grating, without converting the TE0 mode optical signal having the first wavelength and the second wavelength to another mode. The method further includes receiving, at the TE0 mode add/drop filter, a reflected TE1 mode optical signal having the first wavelength from the Bragg grating, and transmitting, from the TE0 mode add/drop filter, the reflected TE1 mode optical signal having the first wavelength towards a photodetector, without converting the reflected TE1 mode optical signal having the first wavelength to another mode.

公开(公告)号：US12034526B2

公开(公告)日：2024-07-09

申请号：US17911879

申请日：2020-03-20

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Alfredo Palagi ,  Roberto Magri ,  Antonio Tartaglia

IPC: H04B10/00 ,  H04J14/02 ,  H04J14/00

CPC classification number: H04J14/0201

Abstract: An add-drop network element (100) for an optical communications network. The add-drop network element comprises an optical amplifier (102) having an input port and an output port. The add-drop network element comprises also comprises an optical coupler (104) and an optical splitter (106). The optical coupler (104) comprises an add input port, a through input port and an output port, the output port of the optical coupler (104) being connected to the input port of the optical amplifier. The optical splitter (106) comprising a drop output port, a through output port and an input port, the input port of the optical splitter (106) being connected to the output port of the optical amplifier.

公开(公告)号：US20240187762A1

公开(公告)日：2024-06-06

申请号：US18061681

申请日：2022-12-05

Applicant: AT&T Intellectual Property I, L.P. ,  AT&T Communications Services India Private Limited

Inventor： Mritunjay Pandey ,  Subhash Kapoor ,  Lynn Rivera ,  Saurav Paira

IPC: H04Q11/00 ,  H04B10/27 ,  H04J14/02

CPC classification number: H04Q11/0062 ,  H04B10/27 ,  H04J14/0201 ,  H04Q2011/009

Abstract: Aspects of the subject disclosure may include, for example, identifying network elements of a wavelength division multiplexing (WDM) domain of an optical waveguide communication system that includes a group of optical-add-drop multiplexor (OADM) devices. Operations are observed for the WDM domain configured to deliver communication services configured for simultaneously transporting independent signals across a network of single optical waveguides. A demand for optical waveguide communication services is determined and the WDM network is configured according to the optical fiber communication link requirement and according to the observations. The configured WDM network includes at least one OADM device of the group of OADM devices configured to provide a WDM cross-frequency network path of the configured WDM network. Other embodiments are disclosed.

公开(公告)号：US11984932B2

公开(公告)日：2024-05-14

申请号：US17752832

申请日：2022-05-24

Applicant: Infinera Corporation

Inventor： Jeffrey T. Rahn ,  Kuang-Tsan Wu ,  Steven Joseph Hand ,  Han Henry Sun

IPC: H04B10/06 ,  H04B10/2575 ,  H04B10/50 ,  H04B10/516 ,  H04B10/61 ,  H04J14/02 ,  H04Q11/00

CPC classification number: H04B10/612 ,  H04B10/25752 ,  H04B10/505 ,  H04B10/506 ,  H04B10/516 ,  H04B10/616 ,  H04B10/65 ,  H04J14/0201 ,  H04J14/0224 ,  H04J14/0246 ,  H04J14/0282 ,  H04J14/0298 ,  H04Q11/0067

Abstract: Optical network systems and components 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 DACs 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 DACs, and supplies a plurality of optical subcarriers based on the outputs, such that one of the optical subcarriers has a frequency bandwidth that is wider than remaining ones of the optical subcarriers, said one of the optical subcarriers carrying information for clock recovery.

公开(公告)号：US20240089004A1

公开(公告)日：2024-03-14

申请号：US18462470

申请日：2023-09-07

Applicant: Marvell Asia Pte Ltd

Inventor： Gary Mak ,  Lenin Kumar Patra ,  Jamal Riani

IPC: H04B10/50 ,  G02B6/293 ,  H04B10/2563 ,  H04J14/02

CPC classification number: H04B10/503 ,  G02B6/2938 ,  H04B10/2563 ,  H04J14/0201

Abstract: A transmitter includes at least three tunable laser sources, an optical multiplexer, and a processor. The at least three tunable laser sources are configured to receive respective data streams, and to output respective Tx light beams at different respective carrier frequencies, modulated with the respective data streams. The optical multiplexer is configured to combine the multiple Tx light beams to produce a combined beam formed of the modulated Tx light beams at the different carrier frequencies, and to transmit the combined beam over an optical fiber. The processor is configured to receive a notification indicative of an interference occurring due to Four-Wave Mixing (FWM) in the optical fiber, and to modify at least one of the carrier frequencies responsively to the notification in order to mitigate the interference due to FWM.

公开(公告)号：US20190245626A1

公开(公告)日：2019-08-08

申请号：US16270576

申请日：2019-02-07

Applicant: Infinera Corporation

Inventor： Jeffrey T. Rahn ,  Kuang-Tsan Wu ,  Steven Joseph Hand ,  Han Henry Sun

IPC: H04B10/61 ,  H04J14/02 ,  H04B10/2575

CPC classification number: H04J14/0298 ,  H04B10/25752 ,  H04B10/505 ,  H04B10/516 ,  H04B10/611 ,  H04B10/612 ,  H04J14/0201

Abstract: 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.

公开(公告)号：US20190214782A1

公开(公告)日：2019-07-11

申请号：US15868703

申请日：2018-01-11

Applicant: Fujitsu Limited

Inventor： Youichi Akasaka ,  Tadashi Ikeuchi

IPC: H01S3/10 ,  G02B6/02 ,  H01S3/30 ,  G02F1/365

CPC classification number: H01S3/10053 ,  G02B6/02085 ,  G02B6/02195 ,  G02F1/365 ,  H01S3/302 ,  H04B10/67 ,  H04J14/0201

Abstract: An FBG element is configured to apply a phase shift to at least one of an input optical signal, a first pump light, and an idler signal between stages of a phase sensitive amplifier. The FBG element is apodized using a trapezoidal apodization function over the length of the first FBG element to enable tuning of the phase shift over a range of 2π radians.

公开(公告)号：US10079638B2

公开(公告)日：2018-09-18

申请号：US15686460

申请日：2017-08-25

Applicant: TRANSMODE SYSTEMS AB

Inventor： Bengt Johansson ,  Magnus Svevar ,  Ola Wikström ,  Mats Plantare ,  Jan Skagerlund

IPC: H04B10/25 ,  H04B10/032 ,  H04B10/275 ,  H04B10/2575 ,  H04J14/02 ,  H04J14/08 ,  H04B10/079 ,  H04L7/00

CPC classification number: H04B10/032 ,  H04B10/0795 ,  H04B10/2575 ,  H04B10/275 ,  H04J14/0201 ,  H04J14/08 ,  H04L7/0075

Abstract: An optical system is provided comprising a first node and a channel drop add device. The first node is configured to transmit data onto an optical fiber in a first line direction. The channel drop add device (501) is adapted to receive and add channels onto the optical fiber thereby transmitting the data into the first and a second line direction. The network further comprises a second node configured to form a transmitter/receiver function. The second node is configured to receive data on said optical fiber from said first and second line directions. Further, the second node is adapted to synchronize received data from said first and second line directions by delaying the data signals seeing the shortest delay, by a delay device.

公开(公告)号：US20180167159A1

公开(公告)日：2018-06-14

申请号：US15851673

申请日：2017-12-21

Applicant: Snell Holdings, LLC

Inventor： Chris Wilhelm Barnard

IPC: H04J14/02 ,  H04L12/703 ,  H04Q11/00 ,  H04L12/723 ,  H04B10/079 ,  H04B10/572

CPC classification number: H04J14/0293 ,  H04B10/0793 ,  H04B10/572 ,  H04J14/02 ,  H04J14/0201 ,  H04J14/0287 ,  H04L45/28 ,  H04L45/50 ,  H04Q11/0066 ,  H04Q2011/0081

Abstract: The present invention includes novel techniques, apparatus, and systems for optical WDM communications. Tunable lasers are employed to generate subcarrier frequencies representing subchannels of an ITU channel to which client signals can be mapped. Client circuits can be divided and combined before being mapped, independent of one another, to individual subchannels within and across ITU channels. Subchannels may be independently routed to a single subchannel receiver filter, such that each subchannel detected at the receiver may come from a different source location. Network architectures and subchannel transponders, muxponders and crossponders are disclosed, and techniques are employed (at the subchannel level/layer), to facilitate the desired optical routing, switching, concatenation and protection of client circuits mapped to these subchannels across the nodes of a WDM network. Subchannel hopping may also be used to increase the optical network security.

公开(公告)号：US20180091233A1

公开(公告)日：2018-03-29

申请号：US15703399

申请日：2017-09-13

Applicant: RANOVUS INC.

Inventor： Ryan Murray HICKEY

IPC: H04B10/70 ,  H04J14/02 ,  H04J14/06 ,  H04B10/278 ,  H04B10/275

CPC classification number: H04B10/70 ,  G02B6/12007 ,  G02B6/29341 ,  G02B6/29395 ,  G02B2006/12164 ,  H04B10/275 ,  H04B10/278 ,  H04J14/0201 ,  H04J14/06

Abstract: A photonic integrated chip device having a common optical edge interface is provided and specifically a device comprising: a photonic integrated circuit (PIC) chip comprising: an optical circuit; and an electrical interface configured to receive electrical signals for controlling the optical circuit; and, a common optical interface side of the PIC chip comprising: at least one input configured to receive light into the PIC chip to the optical circuit; and at least one output configured to convey at least one optical signal from the optical circuit out of the PIC chip, the electrical interface located on one or more electrical interface sides of the PIC chip different from the common optical interface side.