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1. 发明公开

US20230379055A1 A TELECOMMUNICATIONS NETWORK 审中-公开
公开(公告)号：US20230379055A1
公开(公告)日：2023-11-23
申请号：US18247946
申请日：2021-09-10
申请人： BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY
发明人： Marco MENCHETTI , Fraser BURTON , Liam BUSSEY , Md Asif IQBAL , Amelia WINTERBURN
IPC分类号： H04B10/27 , H04B10/69 , H04B10/50
CPC分类号： H04B10/27 , H04B10/69 , H04B10/503 , H04B2210/006
摘要： This disclosure provides a method of operating a central node in a telecommunications network, the telecommunications network including an optical network and a plurality of distributed nodes each configured to use a first optical signal at a first wavelength, the method including producing a first optical signal at a second wavelength; directing the first optical signal into a first path for the first optical signal and a second path for the first optical signal, wherein the first path for the first optical signal is connected to a first optical stabilizer to stabilize the first optical signal produced by the central node, and the second path for the first optical signal provides the first optical signal to the optical network for distribution to each of the plurality of distributed nodes, wherein the second wavelength has a lower transmission loss than the first wavelength.

2. 发明公开

US20240295594A1 A CONTROLLER FOR AN ELECTROMAGNETIC FIELD DETECTOR 审中-公开
公开(公告)号：US20240295594A1
公开(公告)日：2024-09-05
申请号：US18548391
申请日：2022-02-16
申请人： BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY
发明人： Liam BUSSEY , Fraser BURTON , Amelia WINTERBURN , Marco MENCHETTI
IPC分类号： G01R29/08
CPC分类号： G01R29/0885
摘要： This disclosure provides a method of controlling an electromagnetic field detector by causing a first phase shift to be applied to a second probe signal path so as to cause a variation in a change in intensity of combined first and second paths of a probe signal; obtaining data indicating a second phase shift to be applied to the second probe signal path so as to increase the change in intensity of the combined first and second paths of the probe signal, wherein the second phase shift is determinable from a variation in the change in intensity of the combined first and second paths of the probe signal caused by the first phase shift; and causing the second phase shift to be applied to the second probe signal path.

3. 发明公开

US20240159809A1 ELECTROMAGNETIC FIELD DETECTOR 审中-公开
公开(公告)号：US20240159809A1
公开(公告)日：2024-05-16
申请号：US18548390
申请日：2022-02-15
申请人： BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY
发明人： Fraser BURTON , Marco MENCHETTI , Liam BUSSEY
IPC分类号： G01R29/08
CPC分类号： G01R29/0885 , G01R29/0892
摘要： This invention provides a method of detecting an electromagnetic field, and a device for 5 performing said method, the method comprising the steps of: transmitting a probe signal at a probe frequency in a first probe signal path and a second probe signal path to an optical receiver, wherein the first probe signal path passes through a transmission medium and the probe frequency is set to excite electrons of the transmission medium from a ground state to a first excited state; transmitting a coupling signal at a coupling frequency in a first coupling signal path, wherein the first coupling signal path overlaps with the first probe signal path in the transmission medium in a first overlapping section, wherein the coupling frequency is set to excite electrons of the transmission medium to a predetermined excited state so as to induce an Electromagnetic Induced Transparency, EIT, effect in the transmission medium such that an incident electromagnetic field at the transmission medium causes a change in refractive index in the transmission medium at the first overlapping section such that there is a change in an optical path length difference between the first probe signal path and the second probe signal path; combining the first path of the probe signal, following its passage of the first overlapping section of the transmission medium, with the second path of the probe signal; and monitoring, at the optical receiver, the intensity of the combined first and second paths of the probe signal so as to detect the incident electromagnetic field at the first overlapping section of the transmission medium as a change in the intensity caused by the change in the optical path length difference between the first probe signal path and the second probe signal path.

4. 发明公开

US20240204876A1 WIRELESS TRANSCEIVER 审中-公开
公开(公告)号：US20240204876A1
公开(公告)日：2024-06-20
申请号：US18556887
申请日：2022-03-04
申请人： BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY
发明人： Liam BUSSEY
IPC分类号： H04B10/40
CPC分类号： H04B10/40 , H04B2210/006
摘要： This disclosure provides a first wireless transceiver for a wireless telecommunications network, and a method of operating the first wireless transceiver, such that a combination of a phase-modulated signal and a local oscillator signal cause a detectable change of a probe signal from which a phase state of the phase-modulated signal can be detected.

5. 发明公开

US20230261743A1 ELECTROMAGNETIC FIELD RECEIVER 审中-公开
公开(公告)号：US20230261743A1
公开(公告)日：2023-08-17
申请号：US18005318
申请日：2021-06-10
申请人： BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY
发明人： Fraser BURTON , Liam BUSSEY
IPC分类号： H04B10/073 , H04B1/16 , G01R29/08
CPC分类号： H04B10/073 , H04B1/16 , G01R29/0885 , H04B2210/006
摘要： This invention relates to an electromagnetic field receiver controller including a first and second optical transmitter, a transmission medium and an optical receiver. The first optical transmitter is configured to transmit a probe signal to the optical receiver via the transmission medium at a probe frequency and the second transmitter is configured to transmit a coupling signal via the transmission medium at a coupling frequency, wherein the probe frequency is set to excite electrons of the transmission medium from a ground state to a first excited state and the coupling frequency is set to excite electrons of the transmission medium to a predetermined excited state so as to induce an Electromagnetic Induced Transparency (EIT) effect in the electromagnetic field receiver such that an incident electromagnetic field at the transmission medium causes a detectable change in power of the probe signal at the optical receiver.

6. 发明公开

US20240094275A1 ELECTROMAGNETIC FIELD RECEIVER 审中-公开
公开(公告)号：US20240094275A1
公开(公告)日：2024-03-21
申请号：US18554534
申请日：2022-03-04
申请人： BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY
发明人： Fraser BURTON , Marco MENCHETTI , Liam BUSSEY , Amelia WINTERBURN
IPC分类号： G01R29/08
CPC分类号： G01R29/0885
摘要： This disclosure provides an electromagnetic field detector, and a method of operating the electromagnetic field detector in a wireless telecommunications network, the electromagnetic field detector including a first optical transmitter, a second optical transmitter, and a transmission medium, wherein the first optical transmitter is configured to transmit a probe signal at a probe frequency and the second optical transmitter is configured to transmit a coupling signal at a coupling frequency, wherein the probe frequency is set to excite electrons of the transmission medium from a ground state to a first excited state and the coupling frequency is set to excite electrons of the transmission medium to a predetermined excited state so as to induce an Electromagnetic Induced Transparency (EIT) effect such that an incident electromagnetic field at the transmission medium causes a detectable change in the probe signal.

7. 发明公开

US20230194590A1 WIRELESS TELECOMMUNICATIONS NETWORK 审中-公开
公开(公告)号：US20230194590A1
公开(公告)日：2023-06-22
申请号：US17754871
申请日：2020-09-08
申请人： British Telecommunications Public Limited Company
发明人： Fraser BURTON , Tim WHITLEY , Marcus PATERSON , Liam BUSSEY
IPC分类号： G01R29/08 , G02B6/02
CPC分类号： G01R29/0885 , G02B6/02328
摘要： This disclosure provides a waveguide including a sequence of variable transparency segments, wherein each variable transparency segment of the sequence of variable transparency segments is configured to vary its transparency by the electromagnetically Induced Transparency (EIT) effect and further vary its transparency in response to an incident electromagnetic field; and a plurality of separator segments interspersed within the sequence of variable transparency segments so that each variable transparency segment: has a first separation distance from a first other variable transparency segment being a first predetermined number of variable transparency segments preceding or succeeding in the sequence of variable transparency segments, has a second separation distance from a second other variable transparency segment being a second predetermined number of variable transparency segments preceding or succeeding in the sequence of variable transparency segments, and is uniquely identified by a combination of separation distances comprising its first and second separation distances.

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