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公开(公告)号：US10200144B1
公开(公告)日：2019-02-05
申请号：US15705450
申请日：2017-09-15
发明人： Aref Chowdhury , David Miles
摘要： A communication system that can be used, e.g., to provide high-speed access to the servers of a data center. In an example embodiment, the communication system transports data using WDM optical signals. The downlink WDM signals have some WDM components that are modulated with data and some WDM components that are not modulated with data. The uplink WDM signals are generated at the server end of the system by modulating with data the unmodulated WDM components received through the downlink. Appropriately connected wavelength multiplexers, wavelength demultiplexers, and/or optical filters can be used to properly apply the various modulated WDM components to the corresponding optical receivers and the unmodulated WDM components to the corresponding optical transmitters. The resulting system architecture advantageously enables, e.g., the use of a single, conveniently located multi-wavelength light source to provide carrier wavelengths for both uplink and downlink optical traffic.
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公开(公告)号：US20170201341A1
公开(公告)日：2017-07-13
申请号：US14992981
申请日：2016-01-11
发明人： Aref Chowdhury , Roland Ryf
CPC分类号： H04J14/04 , H04B10/2581 , H04J14/00 , H04J14/02 , H04J14/06
摘要： An optical data transmitter includes vertical cavity surface-emitting lasers and an all-optical spatial mode multiplexer. Each vertical cavity surface-emitting laser is configured to output a data modulated optical carrier at a center wavelength of less than one micrometer. The all-optical spatial mode multiplexer has an optical output and optical inputs. Each vertical cavity surface-emitting lasers is optically connected to one or more of the optical inputs of the all-optical spatial mode multiplexer. The all-optical spatial mode multiplexer is configured to cause at least two of the vertical cavity surface-emitting lasers to excite linearly independent combinations of one or more optical spatial propagating modes of an optical fiber in response to the optical output being coupled to a near end of the optical fiber.
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公开(公告)号：US09712899B2
公开(公告)日：2017-07-18
申请号：US14567328
申请日：2014-12-11
发明人： Marcus Weldon , Aref Chowdhury
CPC分类号： H04Q11/0003 , H04J14/02 , H04J14/0212 , H04J14/0213 , H04Q11/0062 , H04Q2011/0075
摘要： We disclose a hybrid optical switch configured to switch optical channels based on their respective utilization factors. In an example embodiment, optical channels having relatively low utilization factors are unwrapped down to payload units, which are then switched electrically, e.g., using an Optical-Transport-Network (OTN) switch, in a manner that tends to increase the utilization factors of the optical channels that carry the switched payload units. In contrast, optical channels having relatively high utilization factors are switched optically, e.g., using a reconfigurable optical add/drop multiplexer, without being unwrapped. The hybrid optical switch may advantageously be deployed in a network node subjected to relatively high traffic-volume fluctuations because the switch tends to improve optical-channel utilization when the traffic volume is relatively low and to decrease the workload of the corresponding OTN switch when the traffic volume is relatively high.
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公开(公告)号：US20160173964A1
公开(公告)日：2016-06-16
申请号：US14567328
申请日：2014-12-11
发明人： Marcus Weldon , Aref Chowdhury
CPC分类号： H04Q11/0003 , H04J14/02 , H04J14/0212 , H04J14/0213 , H04Q11/0062 , H04Q2011/0075
摘要： We disclose a hybrid optical switch configured to switch optical channels based on their respective utilization factors. In an example embodiment, optical channels having relatively low utilization factors are unwrapped down to payload units, which are then switched electrically, e.g., using an Optical-Transport-Network (OTN) switch, in a manner that tends to increase the utilization factors of the optical channels that carry the switched payload units. In contrast, optical channels having relatively high utilization factors are switched optically, e.g., using a reconfigurable optical add/drop multiplexer, without being unwrapped. The hybrid optical switch may advantageously be deployed in a network node subjected to relatively high traffic-volume fluctuations because the switch tends to improve optical-channel utilization when the traffic volume is relatively low and to decrease the workload of the corresponding OTN switch when the traffic volume is relatively high.
摘要翻译： 我们公开了一种配置为基于它们各自的利用因素来切换光信道的混合光开关。 在示例实施例中，具有相对低的利用因子的光信道被解包为有效载荷单元，然后这些单元以例如使用光传输网络（OTN）交换机的方式进行电路交换，其倾向于增加利用因子 携带有效载荷单元的光信道。 相比之下，具有较高利用率因素的光通道在光学上被切换，例如使用可重新配置的光分插复用器，而不被展开。 混合光交换机可以有利地部署在遭受相对高的业务量体积波动的网络节点中，因为当业务量相对较低时交换机倾向于改善光信道利用，并且当业务量降低时相应的OTN交换机的工作量 音量相对较高。
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公开(公告)号：US10075257B2
公开(公告)日：2018-09-11
申请号：US14992981
申请日：2016-01-11
发明人： Aref Chowdhury , Roland Ryf
IPC分类号： H04J14/04 , H04B10/2581 , H04J14/00 , H04J14/06 , H04J14/02
CPC分类号： H04J14/04 , H04B10/2581 , H04J14/00 , H04J14/02 , H04J14/06
摘要： An optical data transmitter includes vertical cavity surface-emitting lasers and an all-optical spatial mode multiplexer. Each vertical cavity surface-emitting laser is configured to output a data modulated optical carrier at a center wavelength of less than one micrometer. The all-optical spatial mode multiplexer has an optical output and optical inputs. Each vertical cavity surface-emitting lasers is optically connected to one or more of the optical inputs of the all-optical spatial mode multiplexer. The all-optical spatial mode multiplexer is configured to cause at least two of the vertical cavity surface-emitting lasers to excite linearly independent combinations of one or more optical spatial propagating modes of an optical fiber in response to the optical output being coupled to a near end of the optical fiber.
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