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公开(公告)号：US20210257804A1
公开(公告)日：2021-08-19
申请号：US17266114
申请日：2018-10-31
Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
Inventor： Jiulin GAN , Zhongmin YANG , Xiaobo HENG , Zhishen ZHANG
IPC: H01S3/067
Abstract: Disclosed is an all-fiber optical vortex laser based on resonance of orbital angular momentum modes. The all-fiber optical vortex laser has an annular cavity structure, and includes a narrow-linewidth pump laser, an optical amplifier, an orbital angular momentum mode generator, a first polarization controller, an optical fiber circulator, an optical fiber coupler, a second polarization controller and a vortex optical fiber. The orbital angular momentum mode generator (3) realizes directional conversion from a fundamental transverse mode in a single-mode optical fiber into an orbital angular momentum mode with a specific topological charge in a vortex optical fiber. The optical fiber coupler can realize directional coupling from an orbital angular momentum mode in one vortex optical fiber to an orbital angular momentum mode in another vortex optical fiber; the vortex optical fiber is an optical fiber supporting stable transmission of an orbital angular momentum model.
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公开(公告)号：US20220326087A1
公开(公告)日：2022-10-13
申请号：US17436789
申请日：2020-04-30
Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
Inventor： Zhongmin YANG , Xiaoxiao WEN , Wei LIN , Xiaoming WEI
Abstract: The present application relates to a light pulse signal processing system. A to-be-measured signal light source generates a to-be-measured signal light pulse, and the to-be-measured signal light pulse is transmitted to a cylindrical lens. The to-be-measured signal light pulse is converted into a to-be-measured signal light pulse having a spatial angle chirp by the cylindrical lens, and is outputted and is incident into a pair of long mirrors at different angles. The to-be-measured signal light pulse incident at different incident angles is delayed by the pair of long mirrors. A cluster of to-be-measured signal light pulses with a corresponding repetition rate is outputted to a beam combining mirror, and is combined with a cluster of reference light pulses by the beam combining mirror. A light signal analysis device analyzes the combined cluster of light pulses.
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公开(公告)号：US20220246250A1
公开(公告)日：2022-08-04
申请号：US17622867
申请日：2019-10-22
Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
Inventor： Zhongmin YANG , Guoquan QIAN
Abstract: The present invention relates to a method for searching for a structural gene of glass, including the following steps: determining atomic species for structure search according to the glass system; performing structural screening on the basis of the first principle to screen out compounds that can be formed by the interaction between each of the atoms; comparing the formation energy and the phonon spectrum of each compound to obtain stable compounds; and constructing a metastable composition diagram of a glass system according to the stable compounds, in metastable composition diagram, a micro-structural unit of a glassy compound near a target glass composition point is the structural gene of glass in the metastable glass composition diagram.
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公开(公告)号：US20220131329A1
公开(公告)日：2022-04-28
申请号：US17427106
申请日：2019-10-28
Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
Inventor： Shanhui XU , Kunyi LI , Changsheng YANG , Qilai ZHAO , Zhouming FENG , Zhongmin YANG
Abstract: The invention discloses a multi-wavelength and single-frequency Q-switching optical fiber laser device. The laser device comprises a saturable absorber, a high gain optical fiber, a polarization-maintaining multi-wavelength narrow-band fiber Bragg grating, a resonant cavity temperature control module, a polarization-maintaining wavelength division multiplexer, a pump source and a polarization-maintaining light isolator. By taking a highly doped phosphate optical fiber as a laser gain medium, two ends of the optical fiber device are connected with the saturable absorber and the polarization-maintaining multi-wavelength narrow-band fiber Bragg grating respectively to form a short linear laser cavity. A short cavity length of the short linear laser cavity can realize single longitudinal mode operation of laser in the resonant cavity, and meanwhile, a stable multi-wavelength and single-frequency pulse laser output is realized in the resonant cavity by combining multi-wavelength resonance caused by the polarization-maintaining multi-wavelength narrow-band fiber Bragg grating with passive Q-switching performance of the saturable absorber in the cavity. The multi-wavelength single-frequency Q-switching optical fiber laser device of the invention realizes output of a plurality of wavelength pulse laser with adjusted repeated frequency simultaneously, and the laser in each wavelength is maintained in single-frequency operation, such that the multi-wavelength single-frequency Q-switching optical fiber laser device can be widely applied to aspects of laser radar, laser sensing, gas detection and the like.
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公开(公告)号：US20230016454A1
公开(公告)日：2023-01-19
申请号：US17946051
申请日：2022-09-16
Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
Inventor： Zhongmin YANG , Yuankai GUO , Xiaoming WEI
Abstract: The present application relates to a real-time measurement method and system for ultrafast space-time-frequency three-domain information based on space-time-frequency compression. The method includes: generating an ultrafast-pulse optical signal in a to-be-observed physical system; performing intensity-modulated spatial encoding on the ultrafast-pulse optical signal; arranging, by a space-time editor, a time-domain series of an encoded ultrafast-pulse optical signal in a horizontal space direction; performing, by a frequency-space editor, frequency spectral processing on a space-time distribution encoding form of the encoded ultrafast-pulse optical signal; performing, by a frequency-time delayer, frequency-time delaying on an encoded space-time-frequency synchronized ultrafast-pulse optical signal; performing, by an area array detector, real-time compression and acquisition on a high-frequency-resolution encoded space-time-frequency synchronized ultrafast-pulse optical signal, to obtain compressed encoded data information; and decompressing and decoding data according to the compressed encoded data information, to obtain space-time-frequency three-domain synchronization information of the ultrafast-pulse optical signal.
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Patent Agency Ranking
公开(公告)号：US20220216666A1
公开(公告)日：2022-07-07
申请号：US17608482
申请日：2019-10-28
Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
Inventor： Changsheng YANG , Shanhui XU , Linhuan HUANG , Zhongmin YANG , Zhouming FENG
Abstract: Disclosed is a multimode interference effect-based wide tunable single-frequency optical fiber laser device. The laser device comprises a high-reflectivity chirped optical fiber grating, a high-gain optical fiber, a low-reflectivity chirped optical fiber grating, a pump source, an optical circulator, an optical fiber etalon and an SMS optical fiber structure apparatus. The high-reflectivity chirped optical fiber grating, the high-gain optical fiber and the low-reflectivity chirped optical fiber grating are connected in sequence to form a short linear resonant cavity; the optical circulator, the optical fiber etalon and the SMS optical fiber structure apparatus form a ring cavity, a stress loader is fixed onto the SMS optical fiber structure apparatus, and a transmitting wavelength of the SMS optical fiber structure apparatus is changed and tunable filtering by the SMS optical fiber structure apparatus is realized by loading stress to the SMS optical fiber structure apparatus.
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公开(公告)号：US20210407628A1
公开(公告)日：2021-12-30
申请号：US16764406
申请日：2019-07-25
Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
Inventor： Zhongmin YANG , Guoquan QIAN
Abstract: A method for performance prediction of a functional glass system, which includes the following steps: determining species of atoms for structural search according to components of a target glass system; performing structural search based on a first principle to search out compounds that can be formed by interaction between the atoms; comparing a formation energy and a phonon spectrum of each of the compounds to obtain stable compounds; constructing a glass structural composition diagram according to the stable compounds, microstructural units of a glassy compound adjacent to a target glass composition point are structural genes of the glass; and calculating a property of the target glass according to a leverage model formula of a multiplex glass system, the leverage model formula of the multiplex glass system being P0=Σi=1nPi×Li.
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公开(公告)号：US20210351558A1
公开(公告)日：2021-11-11
申请号：US17277305
申请日：2018-10-30
Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
Inventor： Shanhui XU , Qilai ZHAO , Zhitao ZHANG , Changsheng YANG , Zhouming FENG , Zhongmin YANG
Abstract: A tunable narrow-linewidth photo-generated microwave source based on polarization control includes a high-reflectivity fiber grating, a high-gain fiber, a low-reflectivity polarization-maintaining fiber grating, a stress adjusting device, a single-mode semiconductor pump laser, an optical wavelength division multiplexer, a polarization beam splitter, a polarization controller, an optical coupler, and a photoelectric detector. Birefringence distribution in the low-reflectivity polarization-maintaining fiber grating is controlled by adjusting a stress magnitude of the stress adjusting device to the low-reflectivity polarization fiber grating, thereby controlling a laser frequency working in different polarization modes in a resonant cavity, and a tunable narrow-linewidth photo-generated microwave source is generated by a beat-frequency technology using a dual-wavelength narrow-linewidth laser with variable frequency intervals.
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公开(公告)号：US20230011819A1
公开(公告)日：2023-01-12
申请号：US17946054
申请日：2022-09-16
Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
Inventor： Zhongmin YANG , Xiaoxiao WEN , Yueyi SUN , Xiaoming WEI
IPC: H04B10/079
Abstract: The present invention discloses an intelligent real-time full-field measurement method and system for a high-repetition-rate femtosecond pulse. The method includes: splitting a to-be-tested signal into n channels; performing a frequency reduction separation on each of the channels; splitting each channel of frequency-reduced time-domain demultiplexed signals into two signals, where a small dispersion component performs time-domain stretching on one signal, and a big dispersion component performs a time-frequency conversion on the other signal; acquiring time-domain intensity information of the to-be-tested signal after the stretching by the small dispersion component and frequency-domain envelope information of the to-be-tested signal after the time-frequency conversion by the big dispersion component; and continuously iterating the acquired time-domain intensity information and frequency-domain envelope information according to a Gerchberg-Saxton algorithm until a convergence is achieved, to obtain information about intensity and phase of the to-be-tested signal in a time domain and a frequency domain.
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公开(公告)号：US20220299374A1
公开(公告)日：2022-09-22
申请号：US16964095
申请日：2019-06-21
Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY
Inventor： Zhongmin YANG , Wei LIN , Chao MENG , Xiaoxiao WEN , Tian QIAO
Abstract: Disclosed are a method and a system for acquiring three-domain information of ultrafast light field. The method includes: acquiring time-domain information at positions of respective spatial points in a first signal to be measured; acquiring first frequency-domain information of continuous light portions at positions of respective spatial points in a second signal to be measured; acquiring second frequency-domain information of pulse light portions at positions of respective spatial points in a third signal to be measured; and fusing the time-domain information, the first frequency-domain information, and the second frequency-domain information, and determining three-domain information of an ultrafast light field signal according to information obtained by the fusion; wherein, the first signal to be measured, the second signal to be measured and the third signal to be measured are three signals obtained by splitting the ultrafast light field signal to be measured.
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