Patents by Inventor Guangcan Guo
Guangcan Guo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11313925Abstract: Provided is a quantum sensor based on a rare-earth-ion doped optical crystal, having: a rare-earth-ion doped optical crystal; a low temperature providing unit, which provides a low temperature operating environment to the rare-earth-ion doped optical crystal; a constant magnetic field generation unit, which applies a constant magnetic field to the rare-earth-ion doped optical crystal; a light field generation unit, which provides a light field performing optical pumping on the rare-earth-ion doped optical crystal to prepare the rare-earth-ions in an initial spin state, and a light field for exciting Raman scattering of the rare-earth-ion doped optical crystal; a pulsed magnetic field generation unit, which applies a pulsed magnetic field perpendicular to the constant magnetic field to the rare-earth-ion doped optical crystal to make the rare-earth-ion doped optical crystal generate a spin echo; and a heterodyne Raman scattering light field detection and analysis unit, which detects and analyzes a Raman scatteType: GrantFiled: November 14, 2017Date of Patent: April 26, 2022Assignee: University of Science and Technology of ChinaInventors: Zongquan Zhou, Yu Ma, Tao Tu, Chuanfeng Li, Guangcan Guo
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Patent number: 10802102Abstract: A pulsed electron paramagnetic resonance spectrometer comprises: a microwave excitation generating unit for generating at least one microwave pulse; a microwave conducting unit comprising a resonant cavity and a microwave transmission line for transmitting microwaves, wherein the microwave transmission line is connected between the microwave excitation generating unit and the resonant cavity, and the resonant cavity is for placing a sample; a cryostat and magnet unit comprising a cryostat that performs ultra-low temperature cooling for the microwave resonant cavity, the microwave transmission line being disposed to pass through the cryostat and connected to the resonant cavity; the cryostat and magnet unit further comprises a magnet that provides a resonance test magnetic field around the sample, the resonant cavity being disposed in a room temperature gap of the magnet. The device of the present disclosure characteristics in ultra-low sample temperature (0.Type: GrantFiled: March 8, 2018Date of Patent: October 13, 2020Assignee: University of Science and Technology of ChinaInventors: Zongquan Zhou, Peiyun Li, Chao Liu, Xiao Liu, Chuanfeng Li, Guangcan Guo
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Publication number: 20200182955Abstract: A pulsed electron paramagnetic resonance spectrometer comprises: a microwave excitation generating unit for generating at least one microwave pulse; a microwave conducting unit comprising a resonant cavity and a microwave transmission line for transmitting microwaves, wherein the microwave transmission line is connected between the microwave excitation generating unit and the resonant cavity, and the resonant cavity is for placing a sample; a cryostat and magnet unit comprising a cryostat that performs ultra-low temperature cooling for the microwave resonant cavity, the microwave transmission line being disposed to pass through the cryostat and connected to the resonant cavity; the cryostat and magnet unit further comprises a magnet that provides a resonance test magnetic field around the sample, the resonant cavity being disposed in a room temperature gap of the magnet. The device of the present disclosure characteristics in ultra-low sample temperature (0.Type: ApplicationFiled: March 8, 2018Publication date: June 11, 2020Inventors: Zongquan ZHOU, Peiyun LI, Chao LIU, Xiao LIU, Chuanfeng LI, Guangcan GUO
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Publication number: 20200072915Abstract: Provided is a quantum sensor based on a rare-earth-ion doped optical crystal, having: a rare-earth-ion doped optical crystal; a low temperature providing unit, which provides a low temperature operating environment to the rare-earth-ion doped optical crystal; a constant magnetic field generation unit, which applies a constant magnetic field to the rare-earth-ion doped optical crystal; a light field generation unit, which provides a light field performing optical pumping on the rare-earth-ion doped optical crystal to prepare the rare-earth-ions in an initial spin state, and a light field for exciting Raman scattering of the rare-earth-ion doped optical crystal; a pulsed magnetic field generation unit, which applies a pulsed magnetic field perpendicular to the constant magnetic field to the rare-earth-ion doped optical crystal to make the rare-earth-ion doped optical crystal generate a spin echo; and a heterodyne Raman scattering light field detection and analysis unit, which detects and analyzes a Raman scatteType: ApplicationFiled: November 14, 2017Publication date: March 5, 2020Inventors: Zongquan Zhou, Yu Ma, Tao Tu, Chuanfeng Li, Guangcan Guo
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Patent number: 9178623Abstract: The present invention utilizes a high-speed serial data transceiver to generate two high-speed electric pulse signals. After passing through a gain network, the signals are used for driving an electro-optic phase modulator (PM) so as to realize phase modulation of photon signals. The present invention may directly use a high-speed digital signal to realize a four-phase modulation function needed by the BB84 quantum key distribution protocol without using a digital to analog converter or an analog switch. This can prevent modulation rate from being restricted by links including digital-to-analog conversion, switching of the analog and the like. A dual-electrode electro-optic phase modulator scheme can also effectively reduce requirements for amplitude of a modulation driving signal, thus facilitating realization of high-speed phase modulation, which meets requirements of quantum key distribution.Type: GrantFiled: March 8, 2013Date of Patent: November 3, 2015Assignee: University of Science and Technology ChinaInventors: Wei Chen, Shuang Wang, Zhenqiang Yin, Dajun Huang, Yang Yang, Zheng Zhou, Deyong He, Yuhu Li, Zhengfu Han, Yonggang Wang, Guangcan Guo
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Publication number: 20140205302Abstract: The present invention utilizes a high-speed serial data transceiver to generate two high-speed electric pulse signals. After passing through a gain network, the signals are used for driving an electro-optic phase modulator (PM) so as to realize phase modulation of photon signals. The present invention may directly use a high-speed digital signal to realize a four-phase modulation function needed by the BB84 quantum key distribution protocol without using a digital to analog converter or an analog switch. This can prevent modulation rate from being restricted by links including digital-to-analogue conversion, switching of the analogue and the like. A dual-electrode electro-optic phase modulator scheme can also effectively reduce requirements for amplitude of a modulation driving signal, thus facilitating realization of high-speed phase modulation, which meets requirements of quantum key distribution.Type: ApplicationFiled: March 8, 2013Publication date: July 24, 2014Applicant: UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINAInventors: Wei Chen, Shuang Wang, Zhenqiang Yin, Dajun Huang, Yang Yang, Zheng Zhou, Deyong He, Yuhu Li, Zhengfu Han, Yonggang Wang, Guangcan Guo
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Patent number: 8331797Abstract: The invention relates to a polarization-controlled encoding method, encoder and quantum key distribution system, which is characterized in that polarization maintaining light path or 90 degree rotation Faraday mirror are used inside the encoder to keep the polarization of the output pulses same, and that in the quantum key distribution system employing the polarization-controlled encoder the pulse emitted from transmitter is unidirectional-transmitted to receiver and then quantum key distribution is implemented using interference in the pulses according to the quantum key distribution protocol. The quantum key distribution system using the polarization-controlled encoder of the invention has the ability of avoiding the wiretapping to transmitter, receiver and quantum channel.Type: GrantFiled: August 19, 2004Date of Patent: December 11, 2012Assignee: University of Science and Technology of ChinaInventors: Zhengfu Han, Bing Zhu, Xiaofan Mo, Guangcan Guo
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Patent number: 7596318Abstract: An addressing method of quantum network and a quantum network router are disclosed. There are at least three nodes in the network. The method comprises steps of: appointing an address serial number for every node; sending photon signals with different wavelength from one node to other nodes, wherein the signal source wavelength and node address are regarded as an addressing badge; determining, by every node, the source of signal according to the addressing badge of received photon signals. Quantum network router comprises a photon signal allocator including N sets of optical components, one end of every optical component is mix-wavelength interface, and the other end includes separate wavelength interfaces; an external interface comprising mix-wavelength interfaces of optical components, separate wavelength interfaces of different optical components, which transmit the same wavelength signals, connect one to one.Type: GrantFiled: June 25, 2004Date of Patent: September 29, 2009Assignee: University of Science and Technology of ChinaInventors: Zhengfu Han, Tao Zhang, Guangcan Guo
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Publication number: 20080037998Abstract: The invention relates to a polarization-controlled encoding method, encoder and quantum key distribution system, which is characterized in that polarization maintaining light path or 90 degree rotation Faraday mirror are used inside the encoder to keep the polarization of the output pulses same, and that in the quantum key distribution system employing the polarization-controlled encoder the pulse emitted from transmitter is unidirectional-transmitted to receiver and then quantum key distribution is implemented using interference in the pulses according to the quantum key distribution protocol. The quantum key distribution system using the polarization-controlled encoder of the invention has the ability of avoiding the wiretapping to transmitter, receiver and quantum channel.Type: ApplicationFiled: August 19, 2004Publication date: February 14, 2008Applicant: University of Science and Technology of ChinaInventors: Han Zhengfu, Bing Zhu, Xiaofan Mo, Guangcan Guo
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Publication number: 20060210270Abstract: An addressing method of quantum network and a quantum network router are disclosed. There are at least three nodes in the network. The method comprises steps of: appointing an address serial number for every node; sending photon signals with different wavelength from one node to other nodes, wherein the signal source wavelength and node address are regarded as an addressing badge; determining, by every node, the source of signal according to the addressing badge of received photon signals. Quantum network router comprises a photon signal allocator including N sets of optical components, one end of every optical component is mix-wavelength interface, and the other end includes separate wavelength interfaces; an external interface comprising mix-wavelength interfaces of optical components, separate wavelength interfaces of different optical components, which transmit the same wavelength signals, connect one to one.Type: ApplicationFiled: June 25, 2004Publication date: September 21, 2006Inventors: Zhengfu Han, Tao Zhang, Guangcan Guo