公开(公告)号：US20180076886A1

公开(公告)日：2018-03-15

申请号：US15261401

申请日：2016-09-09

申请人： Hamid MEHRVAR ,  Peter ASHWOOD-SMITH

发明人： Hamid MEHRVAR ,  Peter ASHWOOD-SMITH

IPC分类号： H04B10/079 ,  H04B10/25 ,  H04B10/40 ,  H04Q11/00 ,  H04L7/00

CPC分类号： H04B10/07951 ,  H04B10/0775 ,  H04B10/2504 ,  H04B10/40 ,  H04J3/0667 ,  H04L7/0075 ,  H04L43/0864 ,  H04L43/106 ,  H04Q11/0005 ,  H04Q2011/0058 ,  H04Q2011/0083

摘要： One aspect of the disclosure is directed to a system and method for determining the propagation delay for a signal to traverse an optical fiber between two transceivers. The method is performed by the first transceiver and includes transmitting a message to the second transceiver over a first optical fiber. The method further includes receiving on the first optical fiber a reply message from the second transceiver including an indication of the internal time for the second transceiver to transmit the reply message. The method further includes determining the time interval from the time the message was transmitted to the time the first transceiver received the reply message. The method further includes calculating the propagation delay from the time interval and the internal time. The method further includes configuring the first transceiver to receive data traffic from the second transceiver on a second optical fiber. Another aspect is directed to a system and method for using the determined propagation delay to synchronize the two transceivers.

公开(公告)号：US20190319735A1

公开(公告)日：2019-10-17

申请号：US16383310

申请日：2019-04-12

申请人： Hamid MEHRVAR ,  Christopher JANZ

发明人： Hamid MEHRVAR ,  Christopher JANZ

IPC分类号： H04J14/02 ,  H04Q11/00

摘要： A method of managing an optical communications network comprising a plurality of nodes interconnected by optical sections. The method comprises: identifying one or more pairs of adjacent DL-equipped nodes at which dummy light (DL) hardware is deployed, respective dummy light (DL) hardware being deployed at fewer than the plurality of the nodes of the optical communications network, the respective DL hardware deployed at a particular node configured to supply dummy light to each optical section extending from the particular node, and defining a respective single-section DL path between each identified pair of adjacent DL-equipped nodes; identifying one or more pairs of non-adjacent DL-equipped nodes at which DL hardware is deployed, and defining a respective multi-section DL path between each identified pair of non-adjacent DL-equipped nodes; and causing the deployed DL hardware to supply DL light to each of the single- and the multi-section DL paths.

公开(公告)号：US20170272165A1

公开(公告)日：2017-09-21

申请号：US15198503

申请日：2016-06-30

申请人： Mohammad Mehdi MANSOURI RAD ,  Hamid MEHRVAR ,  Mehdi Arashmid AKHAVAIN MOHAMMADI

发明人： Mohammad Mehdi MANSOURI RAD ,  Hamid MEHRVAR ,  Mehdi Arashmid AKHAVAIN MOHAMMADI

IPC分类号： H04B10/2581 ,  H04B10/50 ,  H04B10/60

CPC分类号： H04B10/2581 ,  H04B10/50 ,  H04B10/60 ,  H04B10/85

摘要： Transmitter, receiver, system and method for secure data communications are provided. The transmitter receives an optical signal from a signal source and transmits first and second version of the optical signal in first and second areas of an optical channel. The receiver receives first and second components of an obfuscated signal and modifies the first component before combining the modified first component and the second component to obtain a recovered optical signal.

公开(公告)号：US20190238224A1

公开(公告)日：2019-08-01

申请号：US15883540

申请日：2018-01-30

申请人： Mohammad Mehdi MANSOURI RAD ,  Hamid MEHRVAR ,  Zhiping JIANG ,  Eric BERNIER

发明人： Mohammad Mehdi MANSOURI RAD ,  Hamid MEHRVAR ,  Zhiping JIANG ,  Eric BERNIER

IPC分类号： H04B10/079 ,  H04J14/02 ,  H04B10/071 ,  H04B10/80 ,  H04B10/299

摘要： A monitoring and calibration apparatus for an optical networking device such as ROADM is provided. Reflectors are integrated into the device, for example at the ends of optical interconnect cables. The reflectors reflect light in specific monitoring wavelengths and pass other wavelengths such as those used for communication. A light source emits monitoring light which is reflected by the reflector and measured by a detector to measure the integrity of optical paths. The optical paths can include optical cables and cable connectors. Path integrity between different modules of the device can therefore be monitored. Multiple reflectors, reflecting light in different wavelengths, can be placed in series along the same optical path and used to monitor multiple segments of the path. A wavelength selective switch (WSS) of the device can be used to route monitoring light to different optical paths. The WSS also operates to route communication signals in the device.

公开(公告)号：US20180007045A1

公开(公告)日：2018-01-04

申请号：US15198441

申请日：2016-06-30

申请人： Mehdi Arashmid AKHAVAIN MOHAMMADI ,  Mohammad Mehdi MANSOURI RAD ,  Hamid MEHRVAR

发明人： Mehdi Arashmid AKHAVAIN MOHAMMADI ,  Mohammad Mehdi MANSOURI RAD ,  Hamid MEHRVAR

IPC分类号： H04L29/06 ,  H04B10/516 ,  H04B10/66 ,  H04B10/27

CPC分类号： H04L63/0876 ,  H04B10/27 ,  H04B10/516 ,  H04B10/66 ,  H04L63/0428 ,  H04L63/061 ,  H04L63/068

摘要： Transmitter, receiver, system and method for secure data communications are provided. The transmitter encodes data as a spatial symbol in accordance with a codebook to transmit spatially encoded data through the optical channel. The receiver detects a spatial symbol from spatially encoded data received through the optical channel, and generates a data value based on a codebook and the spatial symbol.

公开(公告)号：US20130051809A1

公开(公告)日：2013-02-28

申请号：US13216941

申请日：2011-08-24

申请人： Hamid MEHRVAR ,  Salih Jasarevic ,  Bernard Thiboutot ,  David Doucet

发明人： Hamid MEHRVAR ,  Salih Jasarevic ,  Bernard Thiboutot ,  David Doucet

IPC分类号： H04B10/06

CPC分类号： H04B10/03 ,  H04B10/032 ,  H04B10/6161

摘要： The present disclosure provides short-term optical recovery systems and methods in coherent optical receivers to minimize recovery time for fault scenarios and signal reacquisition while maintaining robust signal acquisition. The short-term optical recovery systems and methods include special techniques and algorithms to minimize recovery time. The short-term optical recovery systems and methods include an expedited acquisition engine that includes a reference clock recovery, a compensator to remove chromatic dispersion, a burst framer, and a compensator to remove polarization dispersion. Importantly, the expedited acquisition engine uses a memory-oriented architecture to allow some properties of the acquisition engine to be stored during initial acquisition and, hence, later on be deployed in any fault scenario to further expedite recovery of a signal. The expedited acquisition engine leverages on a frequency aligned Local Oscillator (LO) as well as pre-calculated dispersion maps and equalizer coefficients.

摘要翻译： 本公开提供了相干光接收机中的短期光学恢复系统和方法，以最小化故障场景的恢复时间和信号重新采集，同时保持鲁棒的信号采集。 短期光学恢复系统和方法包括特殊技术和算法，以最大限度地减少恢复时间。 短期光学恢复系统和方法包括加速采集引擎，其包括参考时钟恢复，用于去除色散的补偿器，突发成帧器和补偿器以去除偏振色散。 重要的是，加速采集引擎使用面向内存的架构，以允许在初始采集期间存储采集引擎的某些属性，并且因此随后部署在任何故障场景中以进一步加速信号的恢复。 加速采集引擎利用频率对准的本地振荡器（LO）以及预先计算的色散映射和均衡器系数。

公开(公告)号：US20210014584A1

公开(公告)日：2021-01-14

申请号：US16508652

申请日：2019-07-11

申请人： Hamid MEHRVAR ,  Chunshu ZHANG

发明人： Hamid MEHRVAR ,  Chunshu ZHANG

IPC分类号： H04Q11/00 ,  H04L29/06 ,  H04J14/02 ,  H04B10/516 ,  H04B10/67

摘要： A system and method for a tunable optical delay line. The tunable optical delay line comprises a coarse delay portion that provides a coarse delay amount, the coarse delay portion including a coarse delay selection element in conjunction with a coarse delay element, the coarse delay selection element incorporated on-chip into a photonic integrated circuit (IC) component, the coarse delay element being disposed off-chip of the photonic IC component and interconnected with the coarse delay selection element; and a fine delay element that provides a fine delay amount, the fine delay element interconnected in series with the coarse delay selection element, the optical delay line being tunable to a target delay amount by agglomerating the coarse and fine delay amounts.

公开(公告)号：US20180062782A1

公开(公告)日：2018-03-01

申请号：US15249784

申请日：2016-08-29

申请人： Hamid MEHRVAR ,  Mohammad Mehdi MANSOURI RAD ,  Christopher JANZ

发明人： Hamid MEHRVAR ,  Mohammad Mehdi MANSOURI RAD ,  Christopher JANZ

IPC分类号： H04J14/02 ,  H04B10/25

CPC分类号： H04J14/0201 ,  H04B10/2504 ,  H04B10/2507 ,  H04J14/0221

摘要： Aspects of the disclosure provide systems and methods which avoid the negative effects of Spectral Hole Burning when spectral changes are made for an optical communication system (OCS). Embodiments of the disclosure are directed to methods and systems which preform spectral holes for the range of wavelength channels expected to be used in the OCS. Embodiments include a configurable idle tone source for providing power to each of a set of idle tone wavelengths distributed across the spectral band used in the optical communication system. The configurable idle tone source is communicatively coupled to an output fiber of an optical network element and controlled such that optical power is present in the output optical fiber at each one of the set of idle tone wavelengths.

公开(公告)号：US20170055049A1

公开(公告)日：2017-02-23

申请号：US14828019

申请日：2015-08-17

申请人： Mohammad KIAEI ,  Hamid MEHRVAR

发明人： Mohammad KIAEI ,  Hamid MEHRVAR

IPC分类号： H04Q11/00 ,  H04L12/933

CPC分类号： H04Q11/0003 ,  H04L49/1523 ,  H04Q11/0005 ,  H04Q11/0062 ,  H04Q2011/0037

摘要： A method and apparatus for routing received connection demands through a photonic switch having multiple parallel instances of a switching plane is provided. Routing respects the constraint that each cell of the switch accommodates a maximum of one lightpath. Connection demands are routed one at a time via switching plane instances where it is possible without violating the constraint. When a demand cannot be routed, a re-arrangement step is performed. A previously routed demand that conflicts with the blocked demand is identified and de-allocated. The blocked demand is then routed in place of this de-allocated demand, which is now considered blocked. The process repeats until no blocked demands remain. Attempts to route additional demands of lower priority can also be made by checking whether each lower priority demand can be routed given the configuration of the switch to route existing demands.

摘要翻译： 提供了一种用于通过具有开关平面的多个平行实例的光子开关来路由所接收的连接需求的方法和装置。 路由方面遵循交换机的每个单元最多容纳一个光路的约束。 连接需求通过可能的切换平面实例一次一个路由，而不违反约束。 当需求不能路由时，执行重新排列步骤。 与被阻止的需求冲突的先前路由的需求被识别和解除分配。 阻塞的需求然后被路由替代现在被认为被阻止的这种去分配的需求。 该过程重复，直到没有阻止需求为止。 通过检查每个较低优先权要求是否可以通过交换机的配置路由现有需求，也可以尝试路由更低优先级的附加需求。

公开(公告)号：US20200351216A1

公开(公告)日：2020-11-05

申请号：US16687283

申请日：2019-11-18

申请人： Hamid MEHRVAR ,  Dominic John GOODWILL ,  Yong LUO

发明人： Hamid MEHRVAR ,  Dominic John GOODWILL ,  Yong LUO

IPC分类号： H04L12/863

摘要： There is provided methods and apparatuses for transferring photonic cells or frames between a photonic switch and an electronic switch enabling a scalable data center cloud system with photonic functions transparently embedded into an electronic chassis. In various embodiments, photonic interface functions may be transparently embedded into existing switch chips (or switch cards) without changes in the line cards. The embedded photonic interface functions may provide the switch cards with the ability to interface with both existing line cards and photonic switches. In order to embed photonic interface functions without changes on the existing line cards, embodiments use two-tier buffering with a pause signalling or pause messaging scheme for managing the two-tier buffer memories.