Patents by Inventor Ninghua Zhu
Ninghua Zhu 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).
-
Patent number: 11978996Abstract: A tunable external cavity laser with dual gain chips, including: a polarization beam splitter having a beam splitting surface arranged at an angle of 45° with respect to a first direction and a second direction perpendicular to the first direction; a first gain chip arranged in the first direction; a second gain chip arranged in the second direction; a feedback cavity arranged in the first direction, wherein the feedback cavity and the first gain chip are respectively arranged on two opposite sides of the polarization beam splitter, and the feedback cavity includes at least one independent Fabry-Perot etalon, at least one air gap Fabry-Perot cavity and a mirror that are arranged in the first direction. The polarization beam splitter and the two gain chips cooperate to share the feedback cavity, so that a wavelength and a phase may be adjusted, and a larger tuning range may be obtained.Type: GrantFiled: December 14, 2021Date of Patent: May 7, 2024Assignee: Institute of Semiconductors, Chinese Academy of SciencesInventors: Changda Xu, Dechao Ban, Wenhui Sun, Wei Chen, Ninghua Zhu, Ming Li
-
Patent number: 11876347Abstract: A broadband tuning system includes a first chip and a second chip. The first chip includes a first light amplification region, a first forward grating region and a first backward grating region that are sequentially arranged in a first direction. The first light amplification region is configured to amplify a first light source and to turn on or turn off the first light source, and the first forward grating region and the first backward grating region are configured to tune the first light source. The second chip includes a second light amplification region, a second forward grating region and a second backward grating region that are sequentially arranged in a second direction. The second light amplification region is configured to amplify a second light source and to turn on or turn off the second light source, and the second forward grating region and the second backward grating region are configured to tune the second light source.Type: GrantFiled: December 29, 2020Date of Patent: January 16, 2024Assignee: INSTITUTE OF SEMICONDUCTORS, CHINESE ACADEMY OF SCIENCESInventors: Wenhui Sun, Wei Chen, Nuannuan Shi, Ninghua Zhu, Ming Li, Xin Wang, Jinhua Bai, Haiqing Yuan, Wei Li, Yu Liu
-
Publication number: 20230387655Abstract: Provided is a light transmitter, including: a substrate; a semiconductor refrigeration assembly arranged on the substrate; a light emitting assembly mounted on the semiconductor refrigeration assembly, so that the semiconductor refrigeration assembly cools the light emitting assembly, and the light emitting assembly is configured to generate a laser beam; a tube shell mounted on the substrate to package the semiconductor refrigeration assembly and the light emitting assembly; an optical fiber configured to output the laser beam generated by the light emitting assembly to an outside of the tube shell; and a transparent filling glue filled in a space between an inner wall of the tube shell and the substrate, and configured to guide the laser beam generated by the light emitting assembly to the optical fiber and transfer a heat generated by the light emitting assembly to the tube shell.Type: ApplicationFiled: March 30, 2023Publication date: November 30, 2023Inventors: Shaokang Chen, Chunyuan Mu, Keqi Cao, Jian Wang, Yu Liu, Wei Chen, Ming Li, Ninghua Zhu
-
Patent number: 11662370Abstract: A frequency spectrum detection system including: a frequency-scan light source, a phase modulator, an optical filter, an optical fiber, a photodetector, a power divider, an electric amplifier, a combiner, an electric filter, and an oscilloscope. The frequency-scan light source, the phase modulator, the optical filter, the photodetector, and the electric amplifier form a ring-shaped optoelectronic oscillator resonant cavity, which is configured to generate a frequency-scan signal. The combiner is configured to receive a signal to be measured. The phase modulator is configured to modulate the combined electrical signal onto a frequency-scan optical signal. The optical filter is configured to selectively attenuate or amplify one sideband of double sidebands of the double-sideband phase-modulated optical signal. The photodetector is configured to detect a signal filtered by the optical filter.Type: GrantFiled: May 28, 2020Date of Patent: May 30, 2023Assignee: INSTITUTE OF SEMICONDUCTORS, CHINESE ACADEMY OF SCIENCESInventors: Ming Li, Tengfei Hao, Jian Tang, Nuannuan Shi, Wei Li, Ninghua Zhu
-
Patent number: 11606064Abstract: A Fourier domain mode-locked optoelectronic oscillator includes a laser light source, a phase modulator, an optical notch filter, a photodetector, an electrical amplifier and a power divider; wherein the laser light source, the phase modulator, the optical notch filter and the photodetector together form a swept microwave photonic filter. The passband of the swept microwave photonic filter is determined by the difference in wavelength corresponding to the laser light source and the notch positions of the optical notch filter. In the present disclosure, the laser light source, the phase modulator, the optical notch filter, and the photodetector are configured to form a fast swept microwave photonic filter, the sweeping of a passband of the microwave photonic filter is realized by the sweeping of the laser light source or the optical notch filter, and the change in the filter's passband is matched with the latency for delivering a signal in the optoelectronic oscillator loop for one trip.Type: GrantFiled: August 6, 2020Date of Patent: March 14, 2023Assignee: INSTITUTE OF SEMICONDUCTORS, CHINESE ACADEMY OF SCIENCESInventors: Ming Li, Tengfei Hao, Jian Tang, Nuannuan Shi, Wei Li, Ninghua Zhu
-
Publication number: 20220255284Abstract: A tunable external cavity laser with dual gain chips, including: a polarization beam splitter having a beam splitting surface arranged at an angle of 45° with respect to a first direction and a second direction perpendicular to the first direction; a first gain chip arranged in the first direction; a second gain chip arranged in the second direction; a feedback cavity arranged in the first direction, wherein the feedback cavity and the first gain chip are respectively arranged on two opposite sides of the polarization beam splitter, and the feedback cavity includes at least one independent Fabry-Perot etalon, at least one air gap Fabry-Perot cavity and a mirror that are arranged in the first direction. The polarization beam splitter and the two gain chips cooperate to share the feedback cavity, so that a wavelength and a phase may be adjusted, and a larger tuning range may be obtained.Type: ApplicationFiled: December 14, 2021Publication date: August 11, 2022Inventors: Changda Xu, Dechao Ban, Wenhui Sun, Wei Chen, Ninghua Zhu, Ming Li
-
Patent number: 11362482Abstract: An integrated Fourier domain mode-locked optoelectronic oscillator and its application and a communication system are provided, which relates to the technical field of microwave photonics. The integrated Fourier domain mode-locked optoelectronic oscillator includes an optoelectronic chip and an electronic chip. The optoelectronic chip includes a laser, a modulator, an optical notch filter, and a photodetector coupled via an optical waveguide. The electronic chip includes an electrical amplifier and a power splitter coupled via a coplanar microwave waveguide. The volume, weight and power consumption of the Fourier domain mode-locked optoelectronic oscillator is greatly reduced by integrating all the devices on the chip. A tunable sweeping microwave signal output is realized, and the sweeping speed of the output signal is increased. The integrated Fourier domain mode-locked optoelectronic oscillator can be used in radars and communication systems.Type: GrantFiled: May 11, 2020Date of Patent: June 14, 2022Assignee: Institute of Semiconductors, Chinese Academy of SciencesInventors: Ming Li, Tengfei Hao, Dapeng Liu, Nuannuan Shi, Wei Li, Ninghua Zhu
-
Publication number: 20210281044Abstract: A broadband tuning system includes a first chip and a second chip. The first chip includes a first light amplification region, a first forward grating region and a first backward grating region that are sequentially arranged in a first direction. The first light amplification region is configured to amplify a first light source and to turn on or turn off the first light source, and the first forward grating region and the first backward grating region are configured to tune the first light source. The second chip includes a second light amplification region, a second forward grating region and a second backward grating region that are sequentially arranged in a second direction. The second light amplification region is configured to amplify a second light source and to turn on or turn off the second light source, and the second forward grating region and the second backward grating region are configured to tune the second light source.Type: ApplicationFiled: December 29, 2020Publication date: September 9, 2021Inventors: Wenhui Sun, Wei CHEN, Nuannuan SHI, Ninghua ZHU, Ming Li, Yu LIU, Xin WANG, Jinhua BAI, Haiqing YUAN, Wei LI
-
Patent number: 11043917Abstract: Embodiments of the present disclosure disclose an optoelectronic oscillator including an optical chip and a microwave chip. The optical chip is implemented by fabricating different optoelectronic devices on an integrated optical substrate, comprising: a laser assembly; a mode selection device coupled to the laser assembly, and configured to receive the laser and perform mode selection; an optical delay module coupled to the mode selection device; and a detector coupled to the optical delay module. The microwave chip is a microwave integrated circuit formed by fabricating microwave elements on a semiconductor substrate, comprising: a microwave processing circuit configured to receive microwave signal and perform signal processing; a coupler coupled to the microwave processing circuit, and configured to provide a part of the microwave signal to a phase shifter and output the other part thereof; and a phase shifter configured to feed the phase-shifted microwave signal to the laser assembly.Type: GrantFiled: May 12, 2020Date of Patent: June 22, 2021Assignee: INSTITUTE OF SEMICONDUCTORS, CHINESE ACADEMY OF SCIENCESInventors: Ming Li, Dapeng Liu, Nuannuan Shi, Tengfei Hao, Ninghua Zhu
-
Publication number: 20210063452Abstract: A frequency spectrum detection system including: a frequency-scan light source, a phase modulator, an optical filter, an optical fiber, a photodetector, a power divider, an electric amplifier, a combiner, an electric filter, and an oscilloscope. The frequency-scan light source, the phase modulator, the optical filter, the photodetector, and the electric amplifier form a ring-shaped optoelectronic oscillator resonant cavity, which is configured to generate a frequency-scan signal. The combiner is configured to receive a signal to be measured. The phase modulator is configured to modulate the combined electrical signal onto a frequency-scan optical signal. The optical filter is configured to selectively attenuate or amplify one sideband of double sidebands of the double-sideband phase-modulated optical signal. The photodetector is configured to detect a signal filtered by the optical filter.Type: ApplicationFiled: May 28, 2020Publication date: March 4, 2021Inventors: Ming Li, Tengfei Hao, Jian Tang, Nuannuan Shi, Wei Li, Ninghua Zhu
-
Publication number: 20210066875Abstract: A Fourier domain mode-locked optoelectronic oscillator includes a laser light source, a phase modulator, an optical notch filter, a photodetector, an electrical amplifier and a power divider; wherein the laser light source, the phase modulator, the optical notch filter and the photodetector together form a swept microwave photonic filter. The passband of the swept microwave photonic filter is determined by the difference in wavelength corresponding to the laser light source and the notch positions of the optical notch filter. In the present disclosure, the laser light source, the phase modulator, the optical notch filter, and the photodetector are configured to form a fast swept microwave photonic filter, the sweeping of a passband of the microwave photonic filter is realized by the sweeping of the laser light source or the optical notch filter, and the change in the filter's passband is matched with the latency for delivering a signal in the optoelectronic oscillator loop for one trip.Type: ApplicationFiled: August 6, 2020Publication date: March 4, 2021Inventors: Ming LI, Tengfei HAO, Jian TANG, Nuannuan SHI, Wei LI, Ninghua ZHU
-
Publication number: 20200366242Abstract: Embodiments of the present disclosure disclose an optoelectronic oscillator including an optical chip and a microwave chip. The optical chip is implemented by fabricating different optoelectronic devices on an integrated optical substrate, comprising: a laser assembly; a mode selection device coupled to the laser assembly, and configured to receive the laser and perform mode selection; an optical delay module coupled to the mode selection device; and a detector coupled to the optical delay module. The microwave chip is a microwave integrated circuit formed by fabricating microwave elements on a semiconductor substrate, comprising: a microwave processing circuit configured to receive microwave signal and perform signal processing; a coupler coupled to the microwave processing circuit, and configured to provide a part of the microwave signal to a phase shifter and output the other part thereof; and a phase shifter configured to feed the phase-shifted microwave signal to the laser assembly.Type: ApplicationFiled: May 12, 2020Publication date: November 19, 2020Inventors: Ming LI, Dapeng LIU, Nuannuan SHI, Tengfei HAO, Ninghua ZHU
-
Publication number: 20200358244Abstract: An integrated Fourier domain mode-locked optoelectronic oscillator and its application and a communication system are provided, which relates to the technical field of microwave photonics. The integrated Fourier domain mode-locked optoelectronic oscillator includes an optoelectronic chip and an electronic chip. The optoelectronic chip includes a laser, a modulator, an optical notch filter, and a photodetector coupled via an optical waveguide. The electronic chip includes an electrical amplifier and a power splitter coupled via a coplanar microwave waveguide. The volume, weight and power consumption of the Fourier domain mode-locked optoelectronic oscillator is greatly reduced by integrating all the devices on the chip. A tunable sweeping microwave signal output is realized, and the sweeping speed of the output signal is increased. The integrated Fourier domain mode-locked optoelectronic oscillator can be used in radars and communication systems.Type: ApplicationFiled: May 11, 2020Publication date: November 12, 2020Inventors: Ming Li, Tengfei Hao, Dapeng Liu, Nuannuan Shi, Wei Li, Ninghua Zhu
-
Patent number: 10681539Abstract: A multi-band channel encrypting switch control device is provided. The device comprises a transmission part and a receiving part. The transmission part comprises: a first controller to store a secret key and to send a digital signal; an encrypting unit to encrypt the digital signal; a multi-band transmitter to select a plurality of wavebands to transmit the encrypted signal on the plurality of wavebands under control of the secret key; and a switch. The receiving part comprises: a multi-band detector to receive the encrypted signal transmitted on the plurality of wavebands; a decrypting unit to decrypt the encrypted signal; and a second controller to store the secret key and to decide whether or not to issue a switch signal by processing the signal and making decisions using the process result. A transmission device, a receiving device, and a control method are also provided.Type: GrantFiled: December 21, 2016Date of Patent: June 9, 2020Assignee: INSTITUTE OF SEMICONDUCTORS, CHINESE ACADEMY OF SCIENCESInventors: Ninghua Zhu, Wei Chen, Jianguo Liu
-
Patent number: 9966734Abstract: The present invention discloses a semiconductor laser comprising an optical waveguide structure which may include a lower waveguide layer, an active layer of multiple quantum wells and an upper waveguide layer, which are successively stacked from bottom to top, a grating layer being formed on upper portion of the active layer, wherein the upper waveguide layer, a cladding layer and a contact layer are formed as a ridge which has a light incidence end surface and a light output end surface, wherein a beam expanding structure is formed on one end of the output end surface. The beam expanding structure has a beam expanding portion with a shape gradually contracted inwards from the light output end surface. Preferably, the beam expanding portion has a horizontal divergence angle of 5° to 20°.Type: GrantFiled: April 25, 2017Date of Patent: May 8, 2018Assignee: Institute of Semiconductors, Chinese Academy of SciencesInventors: Ninghua Zhu, Jianguo Liu, Jinjin Guo, Wei Chen
-
Publication number: 20170310080Abstract: The present invention discloses a semiconductor laser comprising an optical waveguide structure which may include a lower waveguide layer, an active layer of multiple quantum wells and an upper waveguide layer, which are successively stacked from bottom to top, a grating layer being formed on upper portion of the active layer, wherein the upper waveguide layer, a cladding layer and a contact layer are formed as a ridge which has a light incidence end surface and a light output end surface, wherein a beam expanding structure is formed on one end of the output end surface. The beam expanding structure has a beam expanding portion with a shape gradually contracted inwards from the light output end surface. Preferably, the beam expanding portion has a horizontal divergence angle of 5° to 20°.Type: ApplicationFiled: April 25, 2017Publication date: October 26, 2017Inventors: Ninghua Zhu, Jianguo Liu, Jinjin Guo, Wei Chen
-
Patent number: 9791761Abstract: An integral chip is disclosed by embodiments of the present disclosure, including: two mono-mode vertical coupling gratings, two modulation modules, one 2×1 multi-mode interference coupler, and one dual-mode vertical coupling grating. The integral chip is capable of operating in dual wavelengths and dual polarization states by combination of polarization multiplexing and wavelength division multiplexing so as to realize modulation of complex formats and to enhance data modulation rate.Type: GrantFiled: February 10, 2017Date of Patent: October 17, 2017Assignee: INSTITUTE OF SEMICONDUCTORS, CHINESE ACADEMY OF SCIENCESInventors: Ming Li, Jian Tang, Yu Liu, Haiqing Yuan, Ninghua Zhu
-
Publication number: 20170181128Abstract: A multi-band channel encrypting switch control device is provided. The device comprises a transmission part and a receiving part. The transmission part comprises: a first controller to store a secret key and to send a digital signal; an encrypting unit to encrypt the digital signal; a multi-band transmitter to select a plurality of wavebands to transmit the encrypted signal on the plurality of wavebands under control of the secret key; and a switch. The receiving part comprises: a multi-band detector to receive the encrypted signal transmitted on the plurality of wavebands; a decrypting unit to decrypt the encrypted signal; and a second controller to store the secret key and to decide whether or not to issue a switch signal by processing the signal and making decisions using the process result. A transmission device, a receiving device, and a control method are also provided.Type: ApplicationFiled: December 21, 2016Publication date: June 22, 2017Inventors: Ninghua ZHU, Wei CHEN, Jianguo LIU
-
Patent number: 9210802Abstract: An optoelectronic device includes a packaged part and a core component. The core component includes a chip subcarrier and an optoelectronic chip. The device also includes a connecting plate that forms a coplanar waveguide transmission line together with the ground through a high-frequency transmission line and an isolation dielectric. The coplanar waveguide transmission line and a low-frequency line are connected to the packaged part and the core component and are configured to transmit a high-frequency signal and a low-frequency signal between the packaged part and the core component.Type: GrantFiled: December 30, 2013Date of Patent: December 8, 2015Assignee: Huawei Technologies Co., Ltd.Inventors: Xiaolu Song, Lixian Wang, Ninghua Zhu
-
Patent number: 9059516Abstract: A 3D package device of a photonic integrated chip matching circuit, comprising: a first carrier substrate; a first microwave transmission line array formed by evaporation on the top surface of the first carrier substrate to provide bias voltages and high-frequency modulation signals to the photonic integrated chip; a second carrier substrate formed perpendicularly to the first carrier substrate or to have a certain angle with respect to the first carrier substrate, so as to constitute a 3D structure; a second microwave transmission line array formed by evaporation on the bottom surface of the second carrier substrate to match electrodes of the first microwave transmission line array, the second microwave transmission line array being soldered or sintered with the electrodes of the first microwave transmission line array; an electrode array formed by evaporation on a side surface or two opposite side surfaces of the second carrier substrate; and a microwave circuit.Type: GrantFiled: December 13, 2012Date of Patent: June 16, 2015Assignee: Institute of Semiconductors, Chinese Academy of SciencesInventors: Ninghua Zhu, Jiasheng Wang, Jianguo Liu, Yu Liu