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公开(公告)号：US20240144969A1
公开(公告)日：2024-05-02
申请号：US18406083
申请日：2024-01-05
发明人： Douglas James KELLY , Benn Charles THOMSEN , Dushyanth NARAYANAN , Antony Ian Taylor ROWSTRON , Andreas GEORGIOU
IPC分类号： G11B7/0065 , G11B7/135
CPC分类号： G11B7/0065 , G11B7/135
摘要： A holographic data storage system comprises an emitter system, a holographic recording medium, and an input waveguide network formed of one or more multimode optical waveguides. The holographic recording medium has multiple recording regions, each optically coupled to a corresponding one of multiple out-coupling regions of the input waveguide network, the holographic data storage system arranged to persistently write data of an input beam, received at any one of the out-coupling regions, to the corresponding recording region. A controller is coupled to at least one of the emitter system and at least one controllable guiding element of the input waveguide network and controls at least one optical characteristic of the input beam or the at least one guiding element, so as to guide the input beam from an in-coupling region to any selected one of the multiple out-coupling regions. Similar waveguide networks are provided for carrying reference and output beams.
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公开(公告)号：US20240304216A1
公开(公告)日：2024-09-12
申请号：US18636249
申请日：2024-04-15
IPC分类号： G11B7/24044 , G11B7/0065 , G11B7/135
CPC分类号： G11B7/24044 , G11B7/0065 , G11B7/135
摘要： In an optical data transfer system, a beam modulator is configured to embed a set of data in an input beam. A multimode optical waveguide network has an in-coupling region for receiving the input beam. The multimode optical waveguide network is configured to guide the input beam to an out-coupling region of the multimode optical waveguide network. A spatial coherent detector is configured to measure a phase and an amplitude of an output optical field at multiple locations. The output optical field is at least partially defined by the input beam and thus exhibiting distortion effects caused by the passage of the beam through the multimode waveguide network. Signal processing is applied to an output of the spatial coherent detector, in order to compensate for the distortion effects, and thereby recover, from the output of the spatial coherent detector, the set of data embedded in the input beam.
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公开(公告)号：US20230120717A1
公开(公告)日：2023-04-20
申请号：US17905850
申请日：2021-02-22
IPC分类号： G11B7/0065 , G11B7/135 , G11B7/08
摘要： A method of performing a write operation in a holographic data storage system, in which schedule schedules at least one write operation across multiple non-contiguous write intervals, the write operation pertaining to a set of data to be stored in a region of a holographic recording medium. In each of the non-contiguous write intervals, the region of the holographic recording medium is exposed to an interference pattern caused by interference between a reference beam and an input beam carrying the set of data. The multiple non-contiguous write intervals have a total aggregate duration of sufficient length to cause a persistent state change in the exposed region, such that the set of data is recoverable from that region by the end of a final write interval of the multiple non-contiguous write intervals.
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公开(公告)号：US20230048079A1
公开(公告)日：2023-02-16
申请号：US17904788
申请日：2021-02-22
发明人： Douglas James KELLY , Benn Charles THOMSEN , Dushyanth NARAYANAN , Antony Ian Taylor ROWSTRON , Andreas GEORGIOU
IPC分类号： G02B6/35 , G11B7/0065 , G11B7/135
摘要： A multimode optical waveguide network comprises a parent waveguide and a plurality of child waveguides. Each waveguide is a multimode optical waveguide having a first surface region, multiple second surface regions, and at least one guiding element attached to a surface of the waveguide or embedded within the waveguide, each second surface region of the parent waveguide optically coupled to the first surface region of a corresponding child waveguide. The guiding element(s) of the parent waveguide is arranged to guide a beam, from or to its first surface region, to or from any selected second surface region of its multiple second surface regions. The guiding element(s) of each of the waveguides is configurable for selecting the second surface region of that waveguide and/or responsive to at least one beam characteristic for selecting the second surface region of that waveguide via modulation of the at least one beam characteristic.
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公开(公告)号：US20190354283A1
公开(公告)日：2019-11-21
申请号：US15981789
申请日：2018-05-16
发明人： Antony Ian Taylor ROWSTRON , Ioan Alexandru STEFANOVICI , Aaron William OGUS , Douglas Wayne PHILLIPS , Richard John BLACK , Austin Nicholas DONNELLY , Alexander Lloyd GAUNT , Andreas GEORGIOU , Ariel GOMEZ DIAZ , Serguei Anatolievitch LEGTCHENKO , Reinhard Sebastian Bernhard NOWOZIN , Benn Charles THOMSEN , Hugh David Paul WILLIAMS , David LARA SAUCEDO , Patrick Neil ANDERSON , Andromachi CHATZIELEFTHERIOU , John Christopher DAINTY , James Hilton CLEGG , Raluca Andreea DIACONU , Rokas DREVINSKAS , Mengyang YANG
摘要： A data-storage system comprises a head receiver configured to variably receive up to a number M of write heads. The data-storage system also includes an installed number N of write heads arranged in the head receiver, a substrate receiver configured to receive one or more data-storage substrates, and a positioner machine configured to adjust a relative placement of each of the M write heads with respect to at least one of the one or more data-storage substrates.
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公开(公告)号：US20190114307A1
公开(公告)日：2019-04-18
申请号：US15786347
申请日：2017-10-17
发明人： Ioan Alexandru STEFANOVICI , Benn Charles THOMSEN , Alexander Lloyd GAUNT , Antony Ian Taylor ROWSTRON , Reinhard Sebastian Bernhard NOWOZIN
摘要： Examples are disclosed that relate to reading stored data. The method comprises obtaining a representation of a measurement performed on a data-storage medium, the representation being based on a previously recorded pattern of data encoded in the data-storage medium in a layout that defines a plurality of data locations. The method further comprises inputting the representation into a data decoder comprising a trained machine-learning function, and obtaining from the data decoder, for each data location of the layout, a plurality of probability values, wherein each probability value is associated with a corresponding data value and represents the probability that the corresponding data value matches the actual data value in the previously recorded pattern of data at a same location in the layout.
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公开(公告)号：US20230360674A1
公开(公告)日：2023-11-09
申请号：US17906793
申请日：2021-02-22
发明人： Douglas James KELLY , Benn Charles THOMSEN , Dushyanth NARAYANAN , Antony Ian Taylor ROWSTRON , Andreas GEORGIOU
IPC分类号： G11B7/0065 , G11B7/135
CPC分类号： G11B7/0065 , G11B7/135
摘要： A holographic data storage system comprises an emitter system, a holographic recording medium, and an input waveguide network formed of one or more multimode optical waveguides. The holographic recording medium has multiple recording regions, each optically coupled to a corresponding one of multiple out-coupling regions of the input waveguide network, the holographic data storage system arranged to persistently write data of an input beam, received at any one of the out-coupling regions, to the corresponding recording region. A controller is coupled to at least one of the emitter system and at least one controllable guiding element of the input waveguide network and controls at least one optical characteristic of the input beam or the at least one guiding element, so as to guide the input beam from an in-coupling region to any selected one of the multiple out-coupling regions. Similar waveguide networks are provided for carrying reference and output beams.
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公开(公告)号：US20200336290A1
公开(公告)日：2020-10-22
申请号：US16445198
申请日：2019-06-18
发明人： Istvan HALLER , Krzysztof JOZWIK , Hitesh BALLANI , Paolo COSTA , Benn Charles THOMSEN , Foteini KARINOU , Daniel Jonathan Finchley CLETHEROE , Kai SHI , Sophie Gloria LANGE
摘要： In various examples there is a communications network comprising a plurality of nodes connected via an interconnection medium to form a receive-from-many communications network. The network has a synchronisation mechanism which synchronizes a signal frequency of the nodes. The network has at least one store holding signal amplitude data of signals previously sent between specified pairs of nodes of the communications network. An amplitude controller uses the stored data to adjust amplitudes of signals communicated between at least one of the pairs of nodes of the communications network.
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公开(公告)号：US20190132112A1
公开(公告)日：2019-05-02
申请号：US15857321
申请日：2017-12-28
发明人： Hitesh BALLANI , Paolo COSTA , Hugh David Paul WILLIAMS , István HALLER , Krzysztof JOZWIK , Benn Charles THOMSEN , Kari Aaron CLARK , Adam Christopher FUNNELL , Philip Michael WATTS , Kai SHI , Thomas Michael Hoare GERARD
摘要： There is a communications network node comprising a transmitter or a receiver configured to communicate with a plurality of other nodes via an interconnection medium interconnecting the node and the other nodes. The node is frequency synchronized with regard to signal transmission or reception, via a frequency synchronization mechanism, with at least one of the other nodes. The node has at least one store holding phase data relating to an amount of phase asynchrony and path characteristics between the node and at least one of the other nodes. A phase controller uses the stored data to adjust phase used by the node such that the recovery of data when communicating with at least one other node is facilitated.
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公开(公告)号：US20240257834A1
公开(公告)日：2024-08-01
申请号：US18631043
申请日：2024-04-10
IPC分类号： G11B7/0065 , G11B7/08 , G11B7/135
CPC分类号： G11B7/0065 , G11B7/083 , G11B7/135
摘要： A method of performing a write operation in a holographic data storage system, in which schedule schedules at least one write operation across multiple non-contiguous write intervals, the write operation pertaining to a set of data to be stored in a region of a holographic recording medium. In each of the non-contiguous write intervals, the region of the holographic recording medium is exposed to an interference pattern caused by interference between a reference beam and an input beam carrying the set of data. The multiple non-contiguous write intervals have a total aggregate duration of sufficient length to cause a persistent state change in the exposed region, such that the set of data is recoverable from that region by the end of a final write interval of the multiple non-contiguous write intervals.
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