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1. 发明申请

US20230137204A1 OPTICAL CHANNEL PLAN PROCESS 有权
公开(公告)号：US20230137204A1
公开(公告)日：2023-05-04
申请号：US18093170
申请日：2023-01-04
申请人： Cisco Technology, Inc.
发明人： Claudio Crognale , Giovanni Marenco , Maurizio Di Vizio , Silvia Turolla
IPC分类号： H04B10/69 , H04B17/336 , H04B10/079 , H04J14/02
摘要： Methods for configuring an optical link in which a distribution of transmission data rates and line rates are configured for a predetermined amount of optical bandwidth to maximize transmission capacity. In these methods, a controller of an optical network obtains input parameters that include a signal-to-noise ratio (SNR) for optical signals and an allocated bandwidth of the optical link, further obtains, for each line rate, a mapping of transmission data rates along a frequency spectrum of the allocated bandwidth compatible with the SNR, and generates a channel plan in which a number of traffic modes and a distribution of a plurality of channels in the allocated bandwidth are set to maximize transmission capacity. The plurality of channels is used for transmitting the signals on the optical link. The controller configures at least one optical network element in the optical network to establish the optical link based on the channel plan.

2. 发明授权

US11637630B2 Frequency division multiple access optical subcarriers 有权
公开(公告)号：US11637630B2
公开(公告)日：2023-04-25
申请号：US16578398
申请日：2019-09-23
申请人： Infinera Corporation
发明人： Jeffrey T. Rahn , Kuang-Tsan Wu , Steven J. Hand , David F. Welch
IPC分类号： H04B7/26 , H04B10/50 , H04B10/548 , H04B10/61 , H04B10/69 , H04J14/02 , H04L1/00 , H04L5/00 , H04J14/08 , H04J14/00 , H04B10/077 , H04B10/079 , H04B10/25 , H04B10/40 , H04Q11/00 , H04B10/2575 , H04J99/00
摘要： A network or system in which a hub or primary node may communicate with a plurality of leaf or secondary nodes. The hub node may operate or have a capacity greater than that of the leaf nodes. Accordingly, relatively inexpensive leaf nodes may be deployed to receive data carrying optical signals from, and supply data carrying optical signals to, the hub node. One or more connections may couple each leaf node to the hub node, whereby each connection may include one or more spans or segments of optical fibers, optical amplifiers, optical splitters/combiners, and optical add/drop multiplexer, for example. Optical subcarriers may be transmitted over such connections, each carrying a data stream. The subcarriers may be generated by a combination of a laser and a modulator, such that multiple lasers and modulators are not required, and costs may be reduced. As the bandwidth or capacity requirements of the leaf nodes change, the number of subcarriers, and thus the amount of data provided to each node, may be changed accordingly. Each subcarrier within a dedicated group of subcarriers may carry OAM or control channel information to a corresponding leaf node, and such information may be used by the leaf node to configure the leaf node to have a desired bandwidth or capacity.

3. 发明申请

US20230118684A1 SYSTEMS AND METHODS FOR MONITORING GENERALIZED OPTICAL SIGNAL-TO-NOISE RATIO 有权
公开(公告)号：US20230118684A1
公开(公告)日：2023-04-20
申请号：US17503712
申请日：2021-10-18
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： Zhiping JIANG , Choloong HAHN
IPC分类号： H04B10/079
摘要： The disclosed systems and methods for monitoring, by a coherent optical monitor (OPM), generalized optical signal-to-noise ratio (gOSNR) of an optical channel, the method comprising: i) receiving, by an input port of the coherent OPM, a first signal and a second signal, wherein: the first signal and the second signal include same data, the first signal is an optical signal received from the optical channel, and the first signal is affected by a noise; ii) processing, by a digital signal processor (DSP) of the coherent OPM, the first signal and the second signal and extract the data from the first signal and the second signal; iii) computing, by the DSP, a first correlation between the data from the first signal and the data from the second digital signal; and iv) computing, by the DSP, a first gOSNR based on the first correlation.

4. 发明授权

US11632180B2 Coherent optical receiver device and coherent optical receiving method 有权
公开(公告)号：US11632180B2
公开(公告)日：2023-04-18
申请号：US17219256
申请日：2021-03-31
申请人： NEC CORPORATION
发明人： Kouichi Suzuki
IPC分类号： H04B10/61 , H04B10/079 , H04J14/02 , H04J14/06
摘要： In a coherent optical receiver device, the dynamic range considerably decreases in the case of selectively receiving the optical multiplexed signals by means of the wavelength of the local oscillator light, therefore, a coherent optical receiver device according to an exemplary aspect of the invention includes a coherent optical receiver receiving optical multiplexed signals in a lump in which signal light is multiplexed; a variable optical attenuator; a local oscillator connected to the coherent optical receiver; and a first controller controlling the variable optical attenuator by means of a first control signal based on an output signal of the coherent optical receiver; wherein the coherent optical receiver includes a 90-degree hybrid circuit, a photoelectric converter, and an impedance conversion amplifier, and selectively detects the signal light interfering with local oscillation light output by the local oscillator out of the optical multiplexed signals; and the variable optical attenuator is disposed in the optical path of the optical multiplexed signals in a stage preceding the photoelectric converter, inputs the optical multiplexed signals, and outputs them to the coherent optical receiver controlling the intensity of the optical multiplexed signals based on the first control signal.

5. 发明申请

US20230101899A1 OPTICAL COMMUNICATION SYSTEM, FAILURE ANALYSIS APPARATUS, AND FAILURE ANALYSIS METHODOF OPTICAL COMMUNICATION SYSTEM 有权
公开(公告)号：US20230101899A1
公开(公告)日：2023-03-30
申请号：US17908643
申请日：2020-03-27
申请人： NEC Corporation
发明人： Shingo KUBOKI
IPC分类号： H04B10/079
摘要： An object is to estimate a location where a communication failure occurs while reducing a load on an apparatus included in an upper layer in an optical communication system. Terminal stations communicate via an optical transmission line constituting an optical network and include one or more transponders. Failure cause estimation apparatuses monitors states of the transponders provided in each of the terminal stations and estimates a failure probability for each location where an occurrence of a failure is suspected. A failure analysis apparatus estimates a location where there is a risk of failure occurrence and a failure probability at the location where there is the risk of failure occurrence based on failure cause estimation results of the failure cause estimation apparatuses provided in the terminal stations.

6. 发明申请

US20230100317A1 Interference Devices for Wavelength Locking 有权
公开(公告)号：US20230100317A1
公开(公告)日：2023-03-30
申请号：US17945862
申请日：2022-09-15
申请人： Apple Inc.
发明人： Jason S. Pelc , Mark Alan Arbore , Yi-Kuei Wu
IPC分类号： H04B10/572 , H04B10/079 , G02B6/42
摘要： Configurations for a modal interference device used for wavelength locking are disclosed. The modal interference device may be an interference device that includes an input waveguide, an interference waveguide, and an output waveguide. A fundamental mode of light may be launched into the input waveguide and the interference waveguide may receive the fundamental mode and generate a higher order mode of light, where the two modes of light may be superimposed while propagating through the interference waveguide. The two modes of light may be received at an output waveguide that collapses the two modes into a single mode and generates an output signal corresponding to the interference between the two modes of light. The output signal may be used to wavelength lock a measured wavelength to a target wavelength. The multiple output waveguides may produce output signals that have dead zones that do not align with one another for any wavelength in the wavelength range of interest.

7. 发明申请

US20230096052A1 Alarm Processing Method and Apparatus 有权
公开(公告)号：US20230096052A1
公开(公告)日：2023-03-30
申请号：US18060913
申请日：2022-12-01
申请人： Huawei Technologies Co., Ltd.
发明人： Liang Sun
IPC分类号： H04B10/032 , H04B10/079
摘要： An alarm processing method and apparatus is disclosed. Specifically, a mechanism of configuring and detecting an LOF pre-alarm is provided. A detection condition of the LOF pre-alarm is that it is detected that a frame alignment failure lasts for first duration. A detection condition of the LOF alarm is that it is detected that a frame alignment failure lasts for second duration. The second duration is less than the first duration. When detecting the LOF pre-alarm, a network device inserts a first maintenance signal frame. The first maintenance signal frame supports frame alignment. In other words, a network device that receives the first maintenance signal frame may perform normal frame alignment, so that no alarm is reported, for example, the LOF alarm is not triggered.

8. 发明申请

US20230087691A1 Through-Display Interferometric Proximity and Velocity Sensing 有权
公开(公告)号：US20230087691A1
公开(公告)日：2023-03-23
申请号：US17903840
申请日：2022-09-06
申请人： Apple Inc.
发明人： Tong Chen , Edward Vail , Mark T. Winkler , Yongkang Gao
IPC分类号： H04B10/079 , H04B10/294
摘要： An optical sensing system includes a transmitter side and a receiver side, and is configured to be positioned below a display of an electronic device. The transmitter side includes a light emitter. The receiver side includes an array of photodiodes. The light emitter of the transmitter side and the array of photodiodes of the receiver side are optically coupled via a waveguide. As a result of this construction, the optical sensing system can be operated as an interferometric optical sensor.

9. 发明申请

US20230081781A1 PERFORMANCE MONITOR FOR AN OPTICAL COMMUNICATION SYSTEM 有权
公开(公告)号：US20230081781A1
公开(公告)日：2023-03-16
申请号：US18047029
申请日：2022-10-17
申请人： Nokia Solutions and Networks Oy
发明人： Camille DELEZOIDE , Petros RAMANTANIS
IPC分类号： H04B10/077 , H04B17/336 , H04B10/079
摘要： A performance monitor configured to unify at least two different signal-quality estimates into a single performance metric such that a systematic error associated with the performance metric can be approximately constant or smaller than a specified fixed limit over a significantly wider range of data-link conditions than that of a conventional performance metric of similar utility. In an example embodiment, the performance metric can be based on a weighted sum of two different SNR estimates, obtained from an error count of the receiver's FEC decoder and from a constellation scatter plot generated using the receiver's symbol decoder, respectively. Different weights for the weighted sum may be selected for different data-link conditions, e.g., using SNR thresholding, analytical formulas, or pre-computed look-up tables. The performance metric may be supplied to a control entity and considered thereby as a factor in a possible decision to trigger protective switching and/or a transponder-mode change.

10. 发明申请

US20230079971A1 BIDIRECTIONAL COHERENT OPTICAL TRANSCEIVER WITH SELF-OPTIMIZATION AND COMMUNICATION METHOD THEREOF 有权
公开(公告)号：US20230079971A1
公开(公告)日：2023-03-16
申请号：US17471417
申请日：2021-09-10
申请人： NGUYEN TAN HUNG
发明人： NGUYEN TAN HUNG
IPC分类号： H04L1/00 , H04B10/40 , H04B7/0413 , H04B10/079
摘要： In one embodiment, information passing mechanism between the two connected optical transceivers is provided. Within the first optical transceiver, Rx 1 calculates the current condition of the uplink channel and passes this information together with the condition of the downlink channel that it receives from Tx 2 to Tx 1. The Tx 1 uses the downlink channel condition that it receives from the Rx 1 to generate signal with appropriate modulation format, shaping factor, baudrate and coding scheme for maximizing the downlink's capacity. The Tx 1 then transmits this information together with the uplink channel condition received from Rx 1 to Rx 2. The Rx 2 uses the information about the modulation format, baudrate, shaping factor and coding scheme that it receives from Tx 1 for the reception of information-bearing signal. The Rx 2 then calculates the transmission channel condition of the downlink channel and passes this information together with the uplink channel condition that it receives from Tx 1 to Tx 2. The Tx 2 then uses the uplink channel condition that it receives from the Rx 2 to generate signal with optimized modulation format, shaping factor, baudrate and coding scheme for maximizing the uplink's capacity. The information exchange process between the two connected optical transceivers then repeats in an endless loop.

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